464 Ad Filter System

Low-pass and high-pass filters are provided for limiting the bandwidth of the signal being fed to the Analog to Digital converter. The cutoff points of each are individually controllable. Signal arriving at the Master Card at pin 1 of the 10-way ribbon connector is attenuated by MDAC E4. The attenuation is controlled by the data written to the A side of P.I.A. DE5. Op-amp F3 in combination with CMOS switches E1, F1, F5 form the low-pass filter. The cutoff frequency is determined by the...

0 0 0 1 1 0 1

No parity bit 7 set to 0 no parity bit 7 set to 1 The 6802's E output is divided by 100 by the dual CMOS counter 4518 at location A2 to provide a 9-6KH2 interrupt source. This clock is connected to the PIA's CA1 pin which in turn is programmed to generate an interrupt to the MPU. This is used by the software in determining the serial output baud rate. 3-2 PTA, VOLTAGE REGULATORS, CLICKER AMD HS-232C SIGNAL ( refer to drawing IKB1-02). 3.2.1 Parallel Interface Adapator (PIA) The two 3 bit ports...

1

The FAIRLIGHT Graphics Monitor is a high resolution CRT monitor for use with the Fairlight range of microcomputers. It is designed to accept composite video from the Graphics Lightpen Card Q219 and interface the lightpen. The Q219 card is located in the microcomputer mainframe. The display tube is a high-resolution 15 diagonal P3T type which gives a crisp, green image. The large format results in a highly readable display, which means low operator fatigue. An optional high-performance Light Pen...

1 Introduction

1.1 Card Cage 1.2 Audio Board 1.5 External Connections Figure 1. C.M.I. Mainframe Block Diagram 3 2. SYSTEM OVERVIEW 2.1 General Principles 2.2 Hardware Software Relationships 2.2.1 System Startup Boot 5 2.2.2 Disk Operations 2.2.3 Lightpen Graphics Display 6 2.2.4 Command Entry 2.2.5 Loading Saving Sounds 2.2.6 Sound Sampling 2.2.7 Music Playing 2.2.8 Music Keyboard Functions 2.2.9 Keyboard Sequencer 2.2.10 Music Composition Language 9 3. SP CIFICATIONS 3.2 AUDIO 3-3 DIGITAL

1 O

1) This is a self-test of the A D converter on the master-card, using a ramp output from any channel in the range 2-8 (CH1 is used to provide the ADCLK signal, the pitch set in the pitch register of CHI controlling the frequency of ADCLK and hence the A D sample frequency). 2) The specified signal source channel (CH< opt> ) Is loaded with a monotonia ramp waveform occupying two segments of waveform memory (256 bytes) and then 3) The signal from the channel output is fed via the cable to the...

10

KEYBOARD DISPLAY AND KEYPAD MODULE, CMI-12 The Display and Keypad Module provides a simple user interface with the CMI from the master music keyboard. A 16-switch keypad is scanned by the Keyboard Controller for commands to be sent to the CMI and a 12 digit LED display receives simple messages from the CMI to the user. This section describes the operation of the CMI-12. 6.1 DISPLAY AND KEYPAD OPERTION (Refer to drawing CMI-12-01) The DL-14T6 LED display modules, containing four digits each,...

10r

Due to the stability required of the horizontal oscillator, the 12 V supply is decoupled first by D12 and C60, and then separated by R39 and R4o. R39 provides output power to pin 2 of the IC. R40 feeds pin 1 and also the input and timebase sections, and is further bypassed via C20. Instability of the horizontal timebase may be caused by too much noise on these supplies. Further decoupling is provided by the separate ground connections to both timebase and output sections (pins 16 and 4). This...

11 Picture Tube Handling

CIRCUIT ADJUSTMENT 5.1 PRELIMINARY SET-UP 5.2 POWER SUPPLY CARD,VDU03 6 5.2.1 24V adjust 5.3 MAIN CARD, yD J01 5.3.1 Horizontal Frequency 6 5-3.2 H. Phase 5.3.3 H. Linearity 6 5.3.4 Vertical Frequency 6 5.3.5 Vertical Height & Linearity 7 5.3-6 Focus Adjustment 5.4 CRT CARD, VDU02 5.4.1 Black Level 6. DISASSEMBLY 6.1 TOP COVER REMOVAL 6.2 PICTURE TUBE REPLACEMENT 8 7. LIGHT PEN 7.1 GENERAL DESCRIPTION

11 Picture Tube Handling 1

BLOCK DIAGRAM 5. CIRCUIT ADJUSTMENT 5.1 PRELIMINARY SET-UP 5.2 POWER SUPPLY CARD,VDU03 6 5.2.1 24V adjust 5.3 MAIN CARD, yD J01 5.3.1 Horizontal Frequency 6 5-3.2 H. Phase 5.3.3 H. Linearity 6 5.3-4 Vertical Frequency 6 5.3.5 Vertical Height & Linearity 7 5.3-6 Focus Adjustment 5.4 CRT CARD, VDU02 5.4.1 Black Level 6. DISASSEMBLY 6.1 TOP COVER REMOVAL 6.2 PICTURE TUBE REPLACEMENT 8 7. LIGHT PEN 7.1 GENERAL DESCRIPTION

11 Preventative Maintenance

The following procedures should be carried out every 1000 hours of operation. 1) Revove the top cover of the Mainframe and clean the mesh above the fans using a vacuum cleaner. 2) Unplug each circuit board, remove dust deposits from components and clean edge connector fingers using a soft cloth and a no-residue solvent such as freon. Check that the polarising key is properly installed in position 7 of each edge connector socket before replacing the cards. 3) Check all cables for signs of...

11 System Overview

The system comprises for main units (Refer Fig. 1). 1) Mainframe Houses the computer section, floppy disk drives, audio generation section and power supplies- 2) Graphics Terminal The primary display terminal for the computer. It is a 15 inch C.R.T. display with lightpen. 3) Alphanumeric Keyboard Sends serial ASCII data to the computer. Used for operator input of commands etc. 4) Music Keyboard Piano-like keyboard sends serial data to the computer on each key depression. Used for live playing....

113dmc015 masterslave keyboard subassembly

1 G5156 KEYBOARD MUSIC 73 KEYS 2 G5154 BRACKET A N K BD MTG 4 G518T RETAINER SPRING MUSIC K BD 5 G5158 SPRING KEYBOARD MUSIC 6 MCM11A CARD K BD MUSIC 24SW 7 MCM11B CARD K BD MUSIC 25SW 8 H0122 SCREW 6BAX3 4 CHD 9 H0012 WASHER STAR 6BA 1 G0030 COVER MUSIC SLAVE WOOD BEIGE 2 G0029 PANEL MUSIC SLAVE BASE BEIGE 3 35156 KEYBOARD MUSIC 73 KEYS 4 G0105 STRIP CLAMP MUSIC K BD. 5 G0002 CHEEK SLAVE LH B K 6 G0003 CHEEK SLAVE RH B K 7 MC014 SLAVE KEYBOARD INTERFACE CARD 3 MC019 CABLE MUSIC SLAVE K BD...

14 Mechanical Parts Lists 238

14.1 MAINFRAME DRAWING REF DMC0001 14.2 CARD CAGE ASSEMBLY DRAWING REF DMC032 14.3 MAINFRAME REAR PANEL DRAWING REF DMC038 14.4 FRONT PANEL ASSEMBLY DRAWING REF DMC042 241 14.5 TRANSFORMER END PLATE DRAWING REF DMC046 242 14.6 REGULATED POWER SUPPLY DRAWING REF DMC057 243 14.7 FAN ASSEMBLY DRAWING REF DMC066 The C.M.I. Mainframe houses all the data processing and audio generation hardware of the C.M.I. System, including D.C. power supplies and floppy-disk drives. This manual is designed to help...

143 Mainframe Rear Panel Drawing Dmc038

REF.NO PART NO DESCRIPTION REMARKS 02 H0213 NUT DRESS KEY SWITCH 03 D8014 KEY SWITCH YALE 04 D6709 CONNECTOR CAN PANEL LINE 3S 05 D6736 CONNECTOR CAN PANEL LINE 3P 06 D6739 CONNECTOR CAN PANEL 7S 07 D6731 LUG DMINI LOC LATCH 09 D6721 CONNECTOR PANEL 5P 10 D6710 CONNECTOR PANEL 5S 11 H0016 WASHER HEAD PHONE SOCKET 12 05410 HOLDER LAMP 01030AC 13 G5412 BEZEL RED 012319 AC 15 G5190 TOP FUSE HOLDER B K 16 D6720 CONNECTOR PANEL 3P 17 D6719 CONNECTOR PANEL 3S 19 G0079 ESCUTCHEON C.M.I REAR PANEL 22...

145 Transformer End Plate Drawing Dmc046

REF.NO PART NO DESCRIPTION ' REMARKS 01 G0051 PLATE C.M.I C CAGE L.H.AND 02 G0066 BRACKET C.M.I AC CONNECTOR 03 G0054 BRACKET C.M.I CAP MTG.AND. 04 G5167 TXFORMER C.M.I 1 ALKAY 05 G5205 CLAMP CORD UTH906 06 G0052 BRKT C.M.I CAP MTG TOP AND 07 G0053 BRKT C.M.I CAP MTG BOT AND. 08 C7& 11 CLIP CAP ELECT SIZE 16 09 G5223 CONNECTOR UTM3191.6R 10 G5222 CONNECTOR UTM3191.6P 11 G5122 CLIP CABLE GREY 3M 12 D2003 RECTIFIER BRIDGE MDA3504 13 G0064 BRACKET C.M.I C CAGE FUSES 14 G5309 HOLDER FUSE FLUSH...

15 11 1 0

RUN Run tests on all active interrupts. Both sequential test (one interrupt at a time) and simultaneous test (triggered simultaneously, arrival checked for correct priority) will be run unless the SEQ or SIM commands have been used. See below. Run will be aborted if error count is exceeded or if the user hits CNTRL ESC (break). REPEAT n Sets the repeat count to n. The original value is printed. A repeat count of zero will continue Indefinitely until aborted. ERROR n Sets maximum error count for...

16 V

Most Of this section is the network required by the horizontal combination IC for timebase generation and compensation. The base frequency is set by C18 quite often problems with stability or frequency adjustment can be solved by replacing this. VR3 enables adjustment either side of the base frequency and can also cause problems. The trimpots are ceramic and rough treatment can fracture them. Be warned - a fracture is not always visible. The frequency and stability of the horizontal trace...

2

C n Channel number Range 1-8, default 1 (always used) R n Audtype AD Run Continuous 16kHz AD Run Continuous 30.2kHz These tests are the same as the AD tests except that sampling continues indefinitely to assist in debugging problems discovered by AD. purpose AD conversion display. Options C n Channel no. Test No.1 Display Routine This simply sets up the specified channel to play back the sampled waveform last recorded by AD or ADCHK. Monitor it at TP6 or the...

2000jG

A board which is unable to load the system and or MEMDBG can only be debugged by optioning it as Card 1 and installing it along with a healthy board as Card 0. If the faulty board still crashes the system, disable the data driver using option W3 (see Q256 hardware documentation). The eight tests contained in the program should be sufficient to solve most problems on the Q256. However MEMDBG has been written such that debug technicians can easily add their own test loops tailor made to...

21 Master Keyboard Disassembly

(Refer to drawings DMC-004C and DMC-004B) (1) Switch off CMI power and remove all cable connections to the keyboard. (2) Place keyboard upside-down on a soft surface. (3) Remove the six screws marked A and the five screws marked 3 on the drawing DMC-004C from the bottom panel of the keyboard. Do not remove any screws other than these from the bottom panel at this stage. (4) Return the keyboard right way up and remove the five back panel screws > attaching the wooden cover to the panel, marked...

23 Slave Keyboard Disassembly And Reassembly

To remove the wooden cover and the CMI-11 switch modules from a 3lave keyboard, follow the same procedures as specified for the master keyboard in sections 2.1.1 and 2.1.3 respectively. 2.3.1 Removal of CMI-14 Slave Interface (Refer to drawing DMC-005) (1) With CMI power off, remove the flat Gable connecting the master- and slave keyboards, if not already done. CAUTION Always turn off CMI power to the master keyboard before connecting or disconnecting the external cable between the master and...

2m2

1M Brightness adjustment 10 uF 350 V C58 2.2 uF 160 V 3YV96F, . . D'l 1 3Y584 the winding between pins 3 and 5 supplies +85 V, rectified by D9 and C 8. This is used to supply both the cathode circuit on the tube support card (P5 pin 5) and one leg of the brightness control (via R52). The Winding between pins 6 and 7 provides two supplies the focus G2 supply (described in the next section), and -155 V, rectified by R51, D11 and C34. This connects via R53 to the other leg of the brightness...

31 Subsystem Substitution

The easiest way to identify the faulty sub-system is to exchange whole.units for known good ones if such are available. If a complete working system is on hand, exchange each sub-system in turn, starting with the most likely to be responsible for a given fault. Some common fault symptoms and suggested substitution procedures follow. 3-1.1 System will not boot. Sucessful Boot is indicated by Page 1 appearing on the screen, or Page 1 Ready message at the music keyboard. Unplug keyboard from...

3125

The precotnpensation value is normally set to 0 on inner and outer tracks. It is more important on inner tracks as the bit density on the disk is greater. W4 selects minifloppy drives and also requires the board to be made with a 34 pin connector (or a special cable) and an 8MHz crystal. The serial data stream that comes from the drive is in a synchronous form. It has embedded the required data as well as clock pulses and syncronization marker bytes. The data separator is used to generate the...

32 Audio

100-120 or 200-250 switch selectable 2 amps 240V, 4 amps 120v 50 60 Hz Channel Outputs Connector type Number of channels Output level Output impedance Output load Cannon XLR 3 pin (balanced) 8 (maximum) 3-7 volts p-p 600 ohms Connector type Cannon XLR 3 pin Load impedance 4 ohm3 (minimum) Power output at clipping 20 watts maximum (This output is not intended to be driven to full output continuously) Connector type 1 4 Stereo Phones Signal Derived from monitor speaker output via 100 ohm resistor...

32 Subsystem Nonsubstitution

SYSTEM INTERCONNECTION CABLES 8 4.1 Mains Cable MC068 (l.E.C.) 4.2 Graphics Terminal Power MC067 (l.E.C.) 9 4.3 Graphics Terminal Signal MC065 9 4.4 Music Keyboard Power MC064 4.5 Music Keyboard Signal MC060 4.6 Alpha-numeric Keyboard Power Signal MC013 11 4.7 Slave Keyboard Power Signal MC059 11 4.8 Printer MC062 4.9 Phones 4.10 Monitor 4.11 Channels 1 to 8 4.12 Mixed Line Out 4.13 Sync 4.14 Filter Output 4.15 Mic In 4.16 Line In 4.17 ADC Direct 5. REPAIR...

33 Keyboard Operation

The keyboard is scanned by the MPU by setting successive rows to 1 using the PIA, and seeing if any columns go to 0. Each key has a unique row and column number thus allowing the MPU to access each of the 64 keys individually. The HALL EFFECT keyswitches do not bounce, so repetitive reads of a key do not have to be made to distinguish if a key is pressed or released. The keyboard scanning is the main program loop. When keys are found depressed and later released, their state is noted in a 64...

34 Mechanical

Dimensions Width 750 mm Depth 450 mm Height 320 mm This section describes the operation of each of the circuit boards used In the C.M.I, mainframe. The information is presented primarily to give service personnel a thorough understanding of the operation of the system as an aid to fault diagnosis to the board level. Once the faulty board has been identified, it is recommended that the Mainframe be repaired by board exchange. The faulty item should be returned to Fairlight Instruments for...

34 Slave Keyboard Malfunctions

Failure of groups of keys or individual diagnosed following the same guidelines keys oh the slave keyboard can be as for the master keyboard. However two additional possible sources of faults exist the cable from the master keyboard to the 3lave, and the CMI-14 slave interface. Since the slave scan address lines are the same as the master 3can address lines, faults in the slave keyboard which corrupt those lines can cause the master to malfunction. Section 7.1.1 describes the use of the 4-pole...

3sx20

A 7.5 V reference is supplied to the base of Q6.Q6 s emitter therefore can set the current flowing through the cathode Chain RT9, R20, R72, Q6, Q7 and C51. R20 varies the voltage on the cathode as this current varies, thus changing the beam current. Three things can influence Q6< s emitter VR2 sets the no-signal beam current i.e. black level. The mixed blanking signal turns Q5 on which shuts down Q6, cutting off the beam current. Video signals turn Q7 on, saturating Q6 and increasing beam...

4

Access to these locations for initialization of the mapsel is decoded by IC 1B, along with the peripheral enable input PENBIN. The output of IC TB is latched on rising BRA by IC 4A (drawing Q256-03) to produce LFC4X. Writing to the mapsel RAM is the most time-critical of all operations on the Q256. Normally the entire current data phase is available to generate the map selection number for the next cycle but when writing, the current data phase must be used to write to the mapsel ram as well....

4000 43ff 5000 53ff 9000 9400 Ao00 A400 B000 B400 Fc00 Ffff

Internal RAM. 23 bytes only used, for software variable storage. Active key input AD nonv. input pia (K34) Key address output ia (F34) Alpha-numeric keyboard comms. ACIA (C67) CMI communications ACTA (D67) Software readable switch External ram 1(l67 n67) External RAM i 2 (K67, M67, not normally Installed) ROM 1 CJ6 , not normally installed) ROM 2 (HI67, not normally installed) The six-pole dual-in-line (DIL) switch SW4 provides adjustment to the sensitivity of the analog controls. It is read...

4101 Introduction

This board contains the controls used for system debugging and reset. It contains 2 push button switches, one for RESET and one for NMI. The remaining toggle switches activate halting of .each CPU and enabling of the appropriate labelled function. The 555 timer is wired as a low frequency oscillator and is used to flash the LED associated with each armed switch. The CMOS NAND gate is used for debouncing of the pushbutton switches. Each switch has two poles. One activates the function while the...

4102 Communications Port

The front pannel also carries a 10-way flat cable connector, P2, that contains serial communications lines from the Q133 card. The hard Disk Subsystem is in three parts. , The D.M.A. interface that plugs into the C.M.I, buss, the Western Digital Controller that connects to this and the Winchester drive itself. The Q077 card interfaces the Western Digital WD 1002-05 Winchester Floppy Controller, to the C.M.I, buss. This parallel interface allows transfers Via D.M.A. for maximum speed. The cable...

411 Introduction

The Q209 contains the dual 6809 processors, on board processor communication hardware entailing, indivisible instructions, processor readable identification map state, interprocess or interrupts, automatic map switching FUSE register and hardware trace logic to enable single stepping for software debugging. The Dual Processor card multiplexes each processor onto a common address and data buss in an interleaved manner, each processor therefore may simultaneously access the same memory location...

41bottom Cover Removal

Disconnect the Power Signal cable from the 2. Place keyboard face down on smooth surface. 3 Using 'locking type' bladed screwdriver, remove the 4 screws from the base cover. Access is gained through the 4 clearance holes in the bottom cover. 4. Lift off the cover and slide the cord grip out from the bottom cover cutout . 1. Remove bottom cover as in 4.1. 2. Spread cord grip open to release cable. 3- Remove the cable from the Printed Circuit Card by spreading the connector locking lugs apart....

435 Memory Array

The dynamic memory array consists of four ranks of nine RAM ICs. Each IC is a 64k x 1 bit device, so each rank forms one byte plus parity bit. Which rank is accessed depends on which RAS and CAS lines are driven low by the decoding circuitry. The RAM chips each have 8 address lines. Since 64k space requires 16 address bits the full address is multiplexed onto the 8 lines. The lower 8 bits (Rowrt address) is latched Into the RAM chips when RAS goes low. After a period of address hold time the...

44 Software Loop And Interrupt Routine

A useful clue when fault finding ROM-based equipment such as the CMI-1C 13 the main software loop which the processor normally executes in the steady state that state which exists after a successful power-on initialisation, but before any special functions have been called upon by key presses, changed A D values., etc. This software loop may also be referred to as the idle loop. Knowledge of what happens in the idle loop allows a service person to establish, for example what peripherials are...

444 Dma Logic

Data requests from the 1791 or Device Driver ROM loading are synchronised with Processor 2 Phase 2 using flip-flops C1 and A10. This sets up a DMA request to the processor (RDMA). DMA cycles are granted by ACK acknowledge signal. Flip-flop A11 only allows a DMA cycle to occur every second Processor cycle (the floppy drive can not transfer at that rate but this is a system constraint on other DMA devices in the DMA daisy chain). The DMA daisy chain is controled by ENL and EDL. Respectively these...

45

Remove the Printed Circuit Card as In 4.3. 2. Place the card down on a flat surface with the keytops facing Upwards. 3- Locate the EPROM near the heat3ink bracket, refer to exploded view 4. NOTE THE POSITION OF PIN 1 ON THE EPROM WITH RESPECT TO ITS SOCKET BEFORE REMOVING THE EPROM. USE THE EPROM'S LABEL AS YOUR GUIDE TO THE POSITION OF PIN 1. Carefully lift out the EPROM from its socket. 5* To replace the EPROM, position its pins over its socket NOTE POSITION OF PIN 1 BEFORE INSERTING and...

45 Keyswitch Module Removal

1 - Remove the bottom cover as in 4.1. 2. Remove the keytop from the module being replaced and as many adjacent buttons as required to allow adequate working space. The keytop can be removed by pulling or prying upward with a padded tool from their under side. FAIRLIGHT INSTRUMENT recommends to use the 'Keytop Puller' tool,(Part SW-10485). Refer to figure 1. The FAIRLTGHT Intelligent Alpha-Numeric Keyboard has been designed to be used as the primary input console for the Fairlight range of...

452 Video Timing Logic

All timing is derived from a crystal oscillator and a counter chain. The dot clock is constucted around inverter F2 and the 10.38Mhz crystal. The string of counters at F9 to F11 and Ell to El3 count the dotclock dotclk and with the aid of SROM produce all video related signals. The screen area is organized as 84 bytes on the line and 304 lines in the frame. The actual displayed area is 64 bytes on the line and 256 lines. One byte time is 8 DOTCLK pulses or 770ns. The SROM prom at E10 generates...

47

Mains Neutral, Active and Ground. A.C. Mains supply to Graphics Terminal. Switched by key 3witch on mainframe. This supply is always the same as the local mains potential. Video signal to Graphics Terminal and Light Pen signals to mainframe. Connector Type Cannon 5-pin. Lightpen Hit. T.T.L. level, asserted low. On oscilloscope, appears as a series of low-going pulses about 1uS wide, repeated every 20mS, when the pen is pointed at a bright area of the screen. See figure 8.3a. Lightpen...

471 Introduction

The Channel Cards are the audio generation and manipulation system of the C.M.I. Up to eight channel cards may be installed. All eight cards are identical and interchangeable. Their assignment (1 to 8) is a function of which slot they are plugged into in the C.M.I. Card Cage. Each Channel Card contains 16K bytes of waveform RAM in which sounds are stored. Circuitry is provided to clock out this memory to a digital to analog converter, also located on the channel card. The speed at which the...

481 Introduction

The Audio Module interfaces the audio input output connectors on the rear panel of the C.M.I, mainframe with the appropriate internal circuitry. Functions include buffering of audio outputs from the channel cards generation of a mixed line output, provision of a monitor amplifier for driving a monitor speaker or headphones, processing of sync input and output signals, and supply of power to the channel cards. Audio from the channel cards arrives at the Audio Module by means of a fifty-way...

493 Regulator 5 Volt 18

This regulator is part of the regulator assembly located at the rear of the C.M.I. Card Cage. IC1 is the regulating element of the circuit. Transistor Q2 senses the current drawn by IC1, driving parellel transistors Q3 to Q6. Equal current sharing is ensured by emitter resistors R7-R10. Current limiting is provided by germanium transistor Ql, which uses the drop across sensing resistor R1 as a current sense. Short circuit current is limited to approximately 20 Amps, regulation falling off above...

500r 82r

The signal appears on pin 2 of connector 3. First it is DC isolated by C1 and R1. It is then sent in two directionsone is to the sync separator which we will treat later. The other is to the contrast pot via pin 4 of P3. This divides the signal down to set the size of the luminance signal as desired. This signal then returns thru pin 6 of P3 to pas3 into the buffer stage. It is rare to encounter problems at this stage.

52 External Connections

6- KEYBOARD DISPLAY AND KEYPAD MODULE , CMI-12 19 6.1 DISPLAY AND KEYPAD OPERTION 6.1.1 LED Display * 19 6.1.2 Keypad 6.2 EXTERNAL CONNECTIONS 7. SLAVE KEYBOARD INTERFACE, CMT-14 20 7.1 OPERATION 7-1.1 Scanning and Buffering 20 7-1.2 Power Supplies 7.2 EXTERNAL CONNECTIONS 3. SCHEMATICS 8.1 MUSIC KEYBOARD CONTROLLER CMI-10 SHEET 1 22 8.2 MUSIC KEYBOARD CONTROLLER CMI-10 SHEET 2 23 8.3 MUSIC KEYBOARD CONTROLLER CMI-10 SHEET 3 --------24 8.4 MUSIC KEYBOARD CONTROLLER CMI-10- SHEET 4 25 8.5...

6 Diagnostic Software

6.1 INTRODUCTION TO DIAGNOSTIC SOFTWARE . 73 6.1.1 RUNNING THE DIAGNOSTIC SOFTWARE 73 6.1.2 CHAIN FILE DIAGNOSTICS 6.1.3 RUNNING INDIVIDUAL TEST PROGRAMS 75 6.1.4 MEASUREMENT TOLERANCES 6.2 CHANNEL CARD TESTS 6.2.1 TRIMMING TESTS 6.2.2 FILTER TESTS 6.2.3 WAVEFORM MEMORY TESTS 6.2.4 MEMORY DUMP 6.2.5 ENVELOPE CONTROL TESTS 6.2.6 VOLUME CONTROL TESTS 6.2.7 TIMER TESTS 6.2.8 PITCH AND OCTAVE CONTROL 6.2.9 INTERRUPT FLAGS 6.3 MASTER CARD TESTS 6.3.1 TIMER TESTS 6.3.1.1 Timer Tests 6.3.1.2 Click Out...

6 diagnostic Software continued

Test no.1 P2 DMA MAP SWITCHING Test no.2 P2 DMA P1 UNIQUENESS DMA256 tests the automatic selection of special DMA mappings via the DMA claim lines which are input to the Q256 memory cards from all devices on the bus which use DMA (Floppy Disk Controller, Hard Disk Controller, General Interface card). P2 initializes map 29 with Block 2 of the test card mapped into K1 (logical area 4000 to 7FFF) as a 16K DMA buffer, and switches into map 29 to fill the buffer with its own page numbers. Then P2...

62 External Connections

4.6.8 Display module test (all segments on) 10 Digit write strobe 9,18, Key scan address and data to display modules 11-16 The Slave Keyboard Interface provides regulated power supplies to the CMI-11 switch modules in a slave keyboard and buffers the analog outputs of the switch modules before feeding them to the master keyboard controller. This section describes the operation of the cmi-14. The five slave key scan address lines from the master keyboard controller are fed straight through to...

63

V floating heater supply, and passes to the tube support card via P5 pins 2 and 3. R49 limits the current. To check the operation of the heater, look for the glow towards the back of tube neck. This combines the video and blanking signals and provides an output stage to drive the cathode. It also supplies and limits the necessary voltages to the rear of the tube Video output blanking '. '. Supplies signals

64 Q256 Memory Card Diagnostics Software

When testing system memory it is desirable to have as little memory space as possible taken up by the operating system and the memory test itself. In order to restrict the memory diagnostics within a 16K block, they are split into three separate programs M0 256, MAP256 and DMA256. The first performs bulk memory testing in 16k chunks and exercises the parity generation checking system. MAP256 tests the full capability of the memory management system, except for the automatic DMA map selection,...

642 Mem256

MEM256 performs the bulk memory data and addressing tests, refresh and parity system tests. Purpose Checks both processors' abilities to write rapidly varying data throughout memory. In each test, the SELected blocks are mapped one at a time into 4000 to 7FFF and a semi-random data sequence written by either or both processors in an order as specified below. Each processor then checks its own data. Test no.1 PI ODD UP, P2 EVEN UP PI writes to all odd locations starting from 4001 and proceeds...

643 Map256

This section describes MAP256 VI - 6 Test name MAP . No. tests 15 Purpose Tests the mapping functions of the 0256. Test no. 1 PAGE UNIQUENESS - P2 Test no. 2 PAGE UNIQUENESS - P1 Options 0 n1,n2 n4 OSBLK Operating system block These tests check that each 2K physical page (there are 128 on each Q256) can be accessed uniquely. The general approach is to write each page with its own page number, and then verify them all to ensure no page overwrote another. Getting around the operating system...

69

DAC Output swing, tests Ns2,3 0 to 5.6 0 to 1.88 0 to 2.6 Test N 4, Filter Distortion (VR2) Option R - channel card Revision Range 1-3 default 3- Reraove the short between TT10 and TT8 for this test. Second harmonic distortion in the CEM 3320 VCF (Revs 1 and 2 only) is minimised by adjusting the resonance control bias. The adjustment is made using a sine wave signal in the pass band of the filter, I.e. well below cutoff. A dummy sound Is played by the channel card at zero pitch, envelope and...

81 General Description

8.2 Circuit Description 7.1 DMKB2 ALPHA NUMERIC KEYBOARD MODULE Drawing ref. Part ii. Description. 3 G0042 Switch Module 4B3S 4 G4008 Support Module St) 10433 5 G4009 Tension bar 7 . 34006 Switch Module 6AID 8 34005 Switch Module 4AIS 9 G4004 Switch Module 6B1D 10 34003 Switch Module 4B1S 11 H0123 Screw 6BAx1 CHD 12 H0201 Nut 6BA Hex. 13 T H0110 Screw 4BAx1 4 nylon 14 H0202 Nut 4BA Hex. 15 H0002 Washer Mica T0220 7.2 DMC003 ALPHA NUMERIC KEYBOARD ASSEMBLY 3 G1017 Top cover 5 D6753 Cover...

81 General Description 11

8.2 Circuit Description 9. vdt701 maim circuit functional description 12 9.1 video blanking 9.1.1 Video Input 9-1.2 Video .Preamp 9.1.3 DC Restoration 13 9.1.4 Mixed Blanking 9.2 HORIZONTAL SECTION 9.2.1 Sync Amplifier 9.2.2 Horizontal Oscillator 15 9-2.3 Decoupling Sync Separation 15 9.2.4 Horizontal Driver 9.2.5 Horizontal Output 16 9.2.6 Feedback 9.2.7 Output Conditioning 9.2.8 Dynamic Focus 9.3 VERTICAL SECTION 9.3.1 Sync Conditioning 19 9-3.2 Vertical Oscillator ------------19 9.3.3...

8yw96s

C33 1 uF C54 100 nF C55 100 uF 40 V Here is what can be called the heart of the circuit, as so much depends on its proper operation. The horizontal flyback transformer drives not only the horizontal trace, but all the HT supplies, the EHT for the tube anode and the heater supply. It also does all this from a single 24 V supply. Q10 is set up as a switch between ground and one end of TX1's primary. The other end of the primary is connected via D8 and C33 to a decoupled 24 V supply. When Q10 is...

942 Audio Board Replacement 161

9.5 TOP COVER REMOVE REPLACE 9 6 SIDE COVER REMOVE REPLACE 9.7 BOTTOM COVER REMOVE REPLACE 9.8 DISK DRIVE REMOVE REPLACE 9.8.2 DISK DRIVE REPLACEMENT 9.9 FAN ASSEMBLY REMOVE REPLACE 9.10 CARD CAGE REMOVE REPLACE 9.10.1 CARD CAGE REMOVAL 9.10.2 CARD CAGE REPLACEMENT 9.11 REGULATED POWER SUPPLY ASSEMBLY REMOVE REPLACE 166. 9.11.1 REMOVAL 9.11.2 REPLACEMENT 9.12 MOTHERBOARD REMOVE REPLACE 9.12.1 REMOVAL 9.12.2 REPLACEMENT 9.13 TRANSFORMER END PLATE REMOVE REPLACE 1 69 9.13.1 REMOVAL 9.13.2...

Ad

6,8.3 Comprehensive Analog Test Chain test name ANALOG To check all analog functions of the CMI channel cards, master card, and audio card. This test is most conveniently used with the Analog Tester box connected to the rear panel of the CMI as labelled. Some cables need to be arranged slightly differently from normal. To make the changes, eject the disk(s), and turn power off first. (1) Keyboard Power cable, normally connected from the CMI to the Music Keyboard, should go to the analog tester....

Adclk

* A 2-way link option is provided on the CMI-25 motherboard whereby a Q096 64K memory card may be installed instead of the Q256, provided an old revision (Rev 5) master card Is used. The default linking on the motherboard connects pin 63A of a Rev 6 master card (PENB Input) to the Peripheral Enable output of the Q256. On an old master card, pin 63a is the Video Ram Enable (VRAMEN) output which connects via the non-default link, to the Graphics Controller VRAMEN input. The Q096 RAM card is not...

Baw62

This section provides a mixed blanking signal to the tube support card. The horizontal blanking signal extracted in the previous section is mixed with the treated vertical sync pulses taken from the vertical section. R11 and R12 also provide biasing for Q5 on the tube support card. The final mixed blanking signal passes to the tube support card via P4 pin 2. 9. VDU01 MAIN CIRCUIT CARD FUNCTIONAL DESCRIPTION (continued) 9.2 HORIZONTAL SECTION This section takes care of everything necessary for...

Byv96e

This section removes non-luminance information from the video signal during horizontal retrace. The horizontal blanking signal is extracted from the horizontal flyback pulses by D5, R9, R10 and R15. Each pulse turns Q4 on, which clamps the video signal via D1. The blanked video is then buffered by emitter follower Q3. R13 in series on the output corrects the impedance and protects the buffer. There is an optional link for selecting an external luminance signal (no sync). The selected signal...

C11

12 V supply to Q5, decoupled by C5. 7.5 V ref. to Q6, generated from 12 V by 85 V supply to cathode chain, decoupled Brightness control voltage, bypassed by 400 V (G2) supply via R33 and C11. Focus voltage via R24. R17, D4 and C7. by R21, C8 and C9. C10. Incorporated into the board layout is a ground ring around the tube connections. If any voltage goes dangerously high , the excess energy will arc over and be dissipated.

Cb2

Buffered through G23 to address to provide CMI-11 switch module addresses CMI-12 keypad mutiplexor addresses LED display module data Data inputs to flip-flops (G4) which switch control button lamps. Analog control input multiplexor addresses. Scan Not Done (SCND) timing flag input Strobe output to update lamp flip-flops LED display digit select lines LED display all-segments-on (cu) and module select (cs) signals. Input flag from keypad multiplexor. Does not generate...

Cd

14 1 C.M.I MAINFRAME DRAWING REF.DMC0001 REF.NO PART NO DESCRIPTION REMARKS 01 G0036 PANEL C.M.I TOP BEIGE 02 MC038 PANEL C.M.I REAR BEIGE 03 G0035 PANEL C.M.I SIDE BEIGE 04 G0050 PANEL C.M.I BOTTOM BEIGE 05 G0069 PANEL SUPPORT BASE 06 G0090 STRIP C.M.I FRONT B KG B K 07 G5054 DISK DRIVE LEFT (0) 08 G5055 DISK DRIVE RIGHT (1) 09 G0089 PANEL C.M.I FRONT 12- G0086 , C CAGE RAIL M BRD UPPER 13 G0033 PLATE DISK DRIVE TOP 14 G0034, PLATE DISK DRIVE BOTTOM 15 G0082 BRACKET CARD CAGE SUP TOP 16 G0081...

Chain Memdbgl

The chain calls the editor followed by the assembler to generate a new MEMDBG.CM on drive 1. Options in the chain include C - generate an assembly listing in the console screen P - print assembly listing on the line printer L - save assembly listing as the file MEMDBG.AL 1 CHAIN MEMDBG l C< return> to list to the console. The program consists of three sections A test executive, the menu, and the collection of test loops. Only the menu needs to be modified to include...

Cmitnt

With the CMI diagnostics disk in drive 0. It does not use the standard command interpreter but has its own commands to set up and run interrupt tests. Each Interrupt ha3 a predetermined priority such that if two or more interrupts arrived since the last interrupt service, the one with the highest priority gets serviced first. The level of an interrupt is a number indicating its priority such that the highest priority interrupts have a level of zero, and the others are arranged in ascending...

D10

*iM5 High voltage type (blue) IMS' High voltage type (blue) This is a +800 V supply derived from the winding between pins 6 arid 7, rectified by R50 and D10. The G2 -t-400 V supply is divided down by special high voltage resistors R54 and R56, passing to the tube support card via PS pin 7. The focus adjust pot is connected directly across the -t-800 V supply. The static focus voltage is mixed thru R57 with the dynamic focus signal at 031, the composite then passing to the tube support card via...

Data Register At Address Register At Status Register At

FC5B (write only) ( HDAD ) FC5B (read only) (HDST ) The following registers are accessed by writing the required registers address to the address register, HDAD, and then accessing the data register. The first 8 locations are in the Western Digital controller and the rest are in the Q077. Data register Error register Sector Count Sector Number Cylinder low Cylinder high Size Drive Head Status Register DMA address low DMA address high control register lower partial sector byte count (inverted)...

Dii

Replay sampled waveform C n Channel no. Test No.1 Display Routine The contents of the RAM buffer are moved to the specified channel card memory and the channel set running until < CNTRL-ESC> is typed. Monitor the waveform at TPS. It should be a low frequency triangle. This test allows a quicker check of sampled data than DBI. Both display routines are only necessary for debugging as the ADI test itself checks if sampled data is correct. Test No. 1 2 Jam and -Jr.jam Purpose Checks correct...

Dmc004c

1 G0023 COVER MUSIC WOOD BEIGE 2 G0027 PANEL MUSIC BASE BEIGE 3 H0114 SCREW 6GX1 2 PAN 4 H0127 SCREW 4BAX3 4 CHD 11.2 DMC004 MASTER KEYBOARD ASSEMBLY 1 G0027 PANEL MUSIC K BD BASE MECHAISM ASSY 9 G0105 STRIP CLAMP MUSIC K BD 11 G0024 STRIP SLIDER POT 12 35161 POT SLIDER 13 G0025 CHEEK RH MASTER V 14 G5165 BEZEL DISPLAY RED 15 MCMI12 CARD MUSIC DISPLAY 16 G5142 SPACER 6BAX1 4 ROUND 17 D6738 CONNECTOR CANNON 7 18 D6710 CONNECTOR CANNON 5S 19 D6729 CONNECTOR DMINI 25S 20 D6727 CONNECTOR DMINI 9S...

Fcxx

MIDI IRQ (CMI-08 only) 0 P SMPTE MIDI IRQ (CMI-28) 0 P Port select I P * The CMI-08 board only generates the MIDINT interrupt which is connected to the PI level 0 IRQ input on the Master card, along with the ACIA IRQ from the Q133. The CMI-28 board only generates the SMIDINT interrupt which is connected to the PI level 3 IRQ input on the Master card, along with the P1 IPI interrupt from the processor card. The B-side signals on pins 67-69 are duplicates of the corresponding signals on side A,...

Figure

2.1.2 Removal of CMI-10 Keyboard Controller (Refer to drawing DMC-004) (6) Remove all cable connections to the CMI-10 module. (7) Unscrew three nuts and bolts attaching the CMI- 10 s heatsink to the back panel. (8) Six plastic standoffs secure the module to the base of the keyboard. With a small screwdriver, press the catch of each standoff while gently prising the module up. (9) Lift the module off the standoffs. 2.1.3 Access to Keyboard Switch Mechanism (Refer to drawings DMC-004C and...

Function

Available for peripherals ACIA registers Timer (6840) PIA registers, user and clock CPU 1 interrupt priOritiser CPU 2 interrupt prioritiser Shared 512 byte RAM Unique 256 byte RAM for each processor 4.2.1.2 Restart and Interrupt Vectors RAM space allocated uniquely to each processor provide independent interrupt vectoring. The vector locations are as follows ADDRESS (HEX) FFFE F FFFC D FFFA B FFF8 9 FFF6 7 FFF4 5 FFF2 3 FFFO 1 FFEE F FFEC D FFEA B FFE8 9 FFE6 7 FFE4 5 FFE2 3 FFEO 1

Functional Descriptional

4.11.1 INTRODUCTION 4.11.2 ADDRESS MAP 4.11.3 COMMANDS 4.11.4 DMA ADDRESS COUNTERS 4.11.5 DMA BYTE TRANSFER COUNTERS 4.11.7 ADDRESS DECODING, CONTROLLER 4.11.8 DMA LOGIC 4.11.9 CONTROL REGISTER 4.11.10 DEVICE DRIVER ROM 4.12 CMI28 GENERAL INTERFACE FUNCTIONAL DESCRIPTION 57 4.12.1 INTRODUCTION 4.12.2 MEMORY CONFIGURATION 4.12.3 68000 6809 DMA BUSS INTERFACE 58 4.12.4 DEBUGGING NOTES FOR DMA CIRCUITRY 4.12.5 SMPTE MIDI CARD PERIPHERAL CIRCUITS 4.12.6 INTERRUPTS 4.12.7 SMPTE GENERATING CIRCUITRY...

Ground

Pulses or tone of 1 to 20 volts P-P. 'Waveform unimportant. Frequency range 2 Hz to 5 kHz. Impedance 10 K ohms. Click Output. Periodic pulse, rate controlled by Page R -R.T.C., Page 9 Keyboard Sequencer or Page C - M.C.L. Waveform is a spike of approx. 5 volts peak, approx. 5 mS wide, alternately positive and negative going. Output of the bandpass filter used by the Analog to Digital converter. It is designed to enable the operator to monitor the effect of various bandpass filter...

I

I ---------> sync 4 out 4.12.10 General Interface Support Card CMI-29 This circuit board contains the analog circuitry required for the I O for SMPTE and MIDI. There are 3 MIDI inputs (A, B & C) and 4 MIDI outputs (A, B, C & D). Provision has been made for a fourth MIDI input (D). The SMPTE input has a balanced line receiver. The signal is then filtered and converted to TTL compatible signals through the LM311 comparator. The SMPTE out signal is converted from a TTL to a balanced line...

Klt

Increase brightness control until picture background can be seen. 2. Adjust H. Phase control VR4 to centre picture horizontally within background raster. 1. Adjust H. Lin coil L2 to obtain optimum horizontal linearity at the start and end of the horizontal scan. 1. Turn V. Frequency control VR40 until picture starts rolling down the screen and the blanking bar is seen. 2. Slowly turn VR40 back so that bar rolls up and locks in. 3. Turn VR40 a few more degrees to ensure stable locking. 5.3.5...

Ymt

Note A reasonable knowledge of the technology involved and the dangers of working with high voltages is essential. This is where the signal enters the 7DTJ. The functions of this section arc Video input ' Video'' preamp DC restoration Mixed blanking Two outputs, video and mixed blanking are supplied to the tube support card. There is an external contrast control. The necessary blanking signals are derived from both the horizontal and vertical circuitry.

Info

The Various CPU functions is an 8 bit register in which each bit may be independently written to. This register is at location 6D, and it Is decoded by devices at 9B and 7A. When written to, the bit address is selected by the 3 least significant bits of the data byte. The state of data bit 3 determines whether the bit is set or cleared. The four functions provided per processor from this register are interprocessor interrupt hardware trace map switch select fast interrupt request where P is 0...

Keyswitch Module Removal

Remove the bottom cover as in 4.1. 2. Remove the keytop from the module being replaced and a3 many adjacent buttons as required to allow adequate working space. The keytop can be removed by pulling or prying upward with a padded tool from their under side. FAIRLIGHT INSTRUMENT recommends to use the 'Keytop Puller' tool,(Part SW-10485). Refer to figure 1. 3. Unsolder the 4 terminals of the Key Switch Module from the PCB using a temperature controlled soldering iron set to 750F degrees. Use a...

Memdbgc

The user i3 presented with a menu of tests indicating which parts of circuitry are exercised by each test. Simply type the number of the required test then answer the prompts for data such as which processor is to run the test, what data is to be used, what 16K memory block is to be written read etc. Once all data required for the test is obtained the test loop is entered immediately. The only thing left to do then watch the signals of Interest behave as the test loop requires. In general it is...

Mq21501

14.1 PARTS LIST FOR DRAWING MQ215L 01 Ref No. Part No. Description. 3 .10209 Front Panel Assy. 6 G0073 Power Supply Base Plate 7 G5159 Voltage Selector Switch 8 J0040 Rear Panel Escutcheon 11 D6768 Power Connector 3 pin 12 D6710 Graphics Connector 5 pin 19 MVDU01 Main Card VDII01 21 G5198 Picture Tube 15 23 MVDU03 P.S.U. Card VDU03 27 H0125 Screw 6gx1 4 28 HO102 Screw CHD4BAX 29 H0111 Screw CKS 4BAxl5 l6 30 H0118 Screw CKS6BAx3 8 31 H0115 Screw 4Gx3 8 33 H0133 Screw CHD i BAr1 4 35 H0021 ' .'...

Ov

6.9.2 Channel Card Revs 1 and 2 (CEM Filter) 6.9.2 Channel Card Revs 1 and 2 (CEM Filter) Zero setting -3dB point (16Hz) expressed as binary fraction. Decimal point is placed between D5 and D6 inputs on DAC. (FILTA,14 setting not shown -3dB at 13.4kHz, -6dB at 19.3kHz) Zero setting -3dB point (16Hz) expressed as binary fraction. Decimal point is placed between D5 and D6 inputs on DAC. (FILTA,14 setting not shown -3dB at 13.4kHz, -6dB at 19.3kHz) 6.9.3 Series A Channel Card Rev 3 (SSM Tracking...

Pp

Balanced, 600 ohms input suitable for microphones. When the MIC LINE switch is in the MIC position, this irtput is fed to the Analog to Digital converter. Balanced, 600 ohm line level input. This Input is connected to the Analog to Digital converter when the MIC LINE switch is in the LINE position. Pin 2 INPUT'A. Amplitude of 1.4 volts P-P required for full scale conversion. Pin 3 INPUT B. Amplitude of 1.4 volts P-P required for full scale conversion. Direct input to the Analog to Digital...

R uf 400 v c3o

This section conditions the horizontal drive to ensure linearity and width are correct. The two coils form an adjustable series LC with the capacitors and deflection coils, and the current waveform determines deflection behaviour. Only the linearity coil is adjustable the width coil was found to work better without its tuning slug. Thus there may be small differences in the screen width of different monitors, but this has not been a problem. Faint Vertical stripes on a bright raster would...

R150 R154

Vertical frequency adjust CI39 470 nF This network is required by the vertical combination IC to generate the vertical timebase. It can be separated into four smaller networks as follows Pin 7 RC network (C133y R148) between 24 Pin 10 RC network (R14Q, R150, CI 36) between 24 V and .'.'grid. Pin 13 Parallel RC (R154, C139) to ground, The problems common to this area are similar to those of the horizontal timebase network. The stability of the trace depends on these networks operating correctly...

Test Procedures 104

6.4.2 MEM256 6.4.3 MAP256 6.4.4 DMA256 6.4.5 MEMDBG 6.4.5.1 Use of MEMDBG 6.4.5.2 Adding Your Own Test Loops 114 6.5 Q133 CENTRAL PROCESSOR CONTROL MODULE 116 6.5.1 USER PERIPHERAL INTERFACE ADAPTER 116 6.5.2 SYSTEM TIMER 6.5.4 ACIA 6.6 Q219 LIGHTPEN GRAPHICS TEST 6.6.1 LGTST 6.6.2 LIGHTPEN TIMERS 6.6.3 LIGHTPEN PIA 6.6.4 PROCESSOR ACCESS SELECTION 6.6.5 LIGHTPEN DRAWING 6.6.6 VIDEO RAM TESTING 6.7 INTERRUPT TESTS 6.7.2 CMIINT COMMANDS 6.7.3 GENERAL PROCEDURE OF TESTS 124 6.7.4 ERROR MESSAGES...

Tp3

1 RTN Z Line in A 3 Line in B line in 50cket This test can also be performed using the Analog Tester box but the tester cannot gain access to the unfiltered channel output and uses the filtered output instead. This can indicate whether there is a major fault in the master filter but there is no point making accurate level measurements since the frequency responses of the channel card, master card, MIC or LINE input amplifiers and the tester itself are all superimposed. Set the tester to FILT...

Under No Circumstances Should Any Force Be Applied To The Neck Of The Tube

If the handling procedures for the tube prior to insertion in the chassis is such that there is a risk of personal injury as a consequence of accidental damage to the tube, then it is recommended that protective clothing should be worn, particularly eye shielding. Fig I.- . Lifting picture tube from edge-down position Fig I.- . Lifting picture tube from edge-down position Fig.2 - Lifting picture tube from face-down position Fig.3Lifting picture tube frpm face-up position Fig.2 - Lifting picture...

Vector

Restart NMI SWI1 Unused FIRQ SWI2 SWI3 Unused IRQ level IRQ level IRQ level IRQ level IRQ level IRQ level IRQ level IRQ level The Q133 contains two 2K ROMs that contain all the basic driver and initialization routines, such as loading the disk drivers and Q256's maprams. The monitor ROM occupies IK bytes from F000 to F3FF and may be accessed by either processor. Processor-unique workspace RAM is used by the monitor so both can be executing the monitor independently. Open 1-byte unit at address...

Vs

Unregulated power supply to music keyboard (also indirectly supplies alphanumeric keyboard). Pins 1,2 + 10V Return. Return (ground) for + 10V supply. Pins 3,4 + 10V Supply. Unregulated supply, +9 to +11 volts. Pin 5 -20V Supply. Unregulated supply, -18 to -22 volts. Pin 6 +20,-20 Return. Return (ground) for + and - 20 supplies. Pin 7 +20V Supply. Unregulated supply, +18 to +22 volts. Bi-directional serial data between mainframe and music keyboard, including busy flags in both directions. Power...

W

Use random number pattern instead of 29 pattern use pattern XX where XX < hex number> write the pattern to disk, read back and verify print error if total recoverable disk errors exceed XX where XX < hex number> . Default value is 0. delay XX*10 ms. after a read write where XX < hex number> teat continouslv alternating between 'add-29' and a random number pattern all error messages printed on printer (a) Disk Read Write Errors These are of the form **PR0M I O ERROR STATUS Xstatus...

Wait

Initially, all interrupts are active, I.e., will be tested upon typing the RUN command. Tests can be activated or deactivated using the commands above. Each test begins with the processor interrupt mask set so that interrupts currently pending are ignored. The status registers associated with each active interrupt Is read in order to clear pending interrupts. These status registers generally contain a flag which indicates an interrupt has been generated and at this point the flag should be...

[

Some MAST tests require at least one channel card to be installed In the CMI. These are indicated by the presence of a C option in the descriptions below. This section describes MAST Version 3-12 Test No.1 Master Timer Read Write Latches Purpose Check ability to communicate with timer. and all numbers is followed by a in the same way. Each write read is a double byte transfer through the 8-bit buss. . Test No,2 Master Timer Internal Clock Timeout Purpose Check timeout operation under internal...

[Coption2

Test No.1 Light Pen Timer Read Write Latches Purpose 6840 timer preset latches can be written to and the counters read. Timers are put into preset state in which the counters always reflect the contents of the preset latches. Then each timer is write read tested with all numbers from 0 to FFFF. Each write read is a 16-bit transfer through the 8-bit buss. Test No. 2 Light Pen Timer Internal Clock Timeout Purpose Correct timeout from timers under internal clock. The internal clock is provided by...

441 Introduction

The floppy interface card interfaces the bit parallel serial buss of floppy disk drives to the C.M.I.'s interleaved parallel buss. The interface is a combination of device driver software, controlling disk data format arid initialization of data transfer parameters, and the hardware which carries out the transfers without processor intervention. Data is stored on the floppy disk itself on its magnetic coating, in concentric rings. In a standard, 8 inch floppy there are 77 such rings on each...

The Diskette In The Drive Under Test With

Tests can be run separately or in destructive non-destruct groups by typing as follows - DM,(0 or 1 or B) ,XT< returri> (Do all non-destruct tests) DD,(0 or 1 or B) ,X < return> (Do all destructive tests) ST < tests> ,(0 or 1 or B) ,X < return> where < tests> up to 10 test numbers separated by '-' The extended test option X accumulates error counts over a number of pass es . ESC key will abort test in progress. Typing 0S< return> will return the user to QDOS and reboot...