CompuPro 816/A User manual

COMPUPRO 8/16 COMPUTERS
Prepared by:
Xerox Corporation
Xerox Service Business
SERVICE MANUAL
SBXCESOI0
Service Education & Customer Support
8200 Brookriver Drive
Dallas, Texas 75247
SEPTEMBER 1983

COMPUPRO
PRELIMINARY
CHAPTER1 GENERAlDATA
COMPUPRO COMPUTERS SERVICE MANUAL
1. GENERAL DATA
1-1

1. GENERAL DATA
11.1 HOW TO USE THIS SERVICE MANUAL I
COMPUPRO
PRELIMINARY
This service manual provides information necessary for maintenance of the CompuPro@ 816
Computers.
11.1.1 MANUAL CONTENT I
The manual is divided into eight chapters. Content of chapters is described below.
Chapter 1. General Data
This chapter provides
information or instructions for manual usage, specifications, tools and
supplies lists, and general procedures.
Chapter 2. Installation .
This chapter provides procedures
for installation equipment by a Service Representative.
Chapter 3. Repair Data
This chapter provides procedures
for removal, replacement, and adjustment of parts. Each pro-
cedure refers
to related parts list (PL) in Chapter 4.
Chapter 4. Parts Identification
This chapter provides exploded view illustrations of parts (and parts configuration) and a
matching list
of parts descriptions. The parts list refers to the related repair procedures in
Chapter 3. Symbols used on parts illustrations are defined in Section 1.1.2.
Chapter 5. PrintJDisplay Quality
This chapter
is provided only in applicable manuals.
Chapter 6. Troubleshooting
This chapter provides CompuPro 816 Computers
troubleshooting introduction and explanations,
Level 1Checkout, Level 2 Check Charts, and power distribution BSDs.
CompuPro@ is a registered trademark of CompuPro Division, Godbout Electronics
1-2

COMPUPRO
PRELIMINARY 1. GENERAL
DATA
11.1.2 MANUAL SYMBOLS I
Symbols used in this service manual are defined below.
rru REMOVAL AND REPLACEMENT
6 ADJUSTMENT
11:11 REMOVAL, REPLACEMENT, AND ADJUSTMENT
Figure 1-2 Repair Procedure Symbols
Repair procedure symbols appear on exploded view illustrations in Chapter 4, located near the
applicable item number on the drawing. The number within the symbol matches the number of the
repair procedure provided in Chapter 3.
11.1.3 REVISION MARKS I
Service manual revisions are provided by a change package or a new issue of the manual. On the
changed or added pages, a letter (at the bottom of the page) is used to identify level of revision. The
following list defines methods used to identify the changes on each page.
Text
Tables
Changed
Illustrations
New
Illustrations
Change bar in left margin
Change bar at left side of the changed data
Number (indicating the level of revision) next to drawing number; change bar at
left side of drawing number
Change bar at left side of drawing number
When additional levels of revision are needed, revision marks for earlier revisions are taken out, and
only new revisions are identified. Each revision includes a new title page containing a Revision
Control List. The list provides page numbers where revisions have occurred as well as letters
identifying the level of revision.
1-3

1. GENERAL DATA
11.2 SPECIFICATIONS 1
11.2.1 CONFIGURATIONS 1
Table 1-1
CompuPro Computers
Configurations
Hardware
816/A 816/8
816/C 816/0
Required Hardware
Desktop Enclosure 2 X X X X
Floppy Disk Enclosure X X X X
Disk 1PWA X X X X
CPU 8085/88 PWA X X X
CPU 8086/87 PWA X
CPU 68K PWA
System Su pport 1PWA X X X X
Interfacer 4 PWA X X
Interfacer 3
XNote 2
XNote 3 XNote 3
M/Drive/H PWA X
Memory SizeNote 1 128K 256K 384K 512K
Note 1: System memory is obtai ned by usi ng RAM 16, RAM 17, or RAM 21 PWAs
Note 2: Interfacer 3 PWA with 5 serial ports (not fully populated).
Note 3: Interfacer 3 PWA with 8 serial ports (fully populated).
1-4
COMPUPRO
PRELIMINARY
System 68K
X
X
X
X
X
X
X
256K

COMPUPRO
PRELIMINARY
11.2.2 ELECTRICAL SPECIFICATIONS I
1. GENERAL DATA
Circuit conductors and ground conductors must be installed in accordance with local electrical
requirements. A standard 15A, 2-pole, 3-wire grounded duplex receptacle is required for proper
machine operation ..
AC power is obtained from a grounded wall outlet. Voltages required at the wall outlet are 103 to
127 VAC line to neutral, 0 to 3 VAC neutral to ground, at 60 Hz.
1-5

COMPUPRO
PRELIMINARY
CHAPTER 2 INSTALLATION
COMPUPRO COMPUTERS
SERVICE MANUAL
2. INSTALLATION
2-1 ,

2. INSTALLATION
12.1 PRELIMINARY CHECKS I
1. MEASURE AND VERIFY VOLTAGE AT WALL RECEPTACLE (FIGURE 2-1).
CAUTION
COMPUPRO
PREll MI NARY
If any of the voltage measurements is not as specified below, the cause must be corrected. Inform
the customer that the equipment must not be connected to the wall receptacle, and that a licensed
electrician must correct the wiring. Do not try to make the correction. If the improper condition has
not been corrected before the next call, provide a written report to your manager about the
improper wiring.
a Move meter RANGE switch to 1 SO VAC scale.
2-2
b. Measure voltage between AC hot (ACH) and neutral (ACN).
c. Verify that meter reading is between 103 VAC and 127 VAC.
d. Measure voltage between ACH and ground (GND).
e. Verify that meter reading is between 103 VAC and 127 VAC.
f. Measure voltage between GND and ACN.
g. Verify
that meter reading is less than 3 VAC.
ACN (LONGER
SLOT) NEUTRAL
GND (HOLE)
ACH (SHORTER
SLOT) HOT
Figure 2-1 Wall Receptacle)

COMPUPRO
PRELIMINARY
2. INSTALLATION
12.2 COMPUPRO 816 COMPUTERS INSTALLATION I
1. REMOVE THE DESKTOP ENCLOSURE 2 FROM SHIPING CARTON AND CHECK FOR DAMAGE.
a. Open shipping carton carefully to preserve packing materials and store for possible
future use.
b. Remove
any accessories (manuals, cables) packed with unit.
c. Remove Desktop Enclosure 2 from carton and place on a desk or table.
d. Check unit for damage.
2. REMOVE FLOPPY DISK ENCLOSURE FROM SHIPPING CARTON AND CHECK FOR DAMAGE.
a. Open shipping carton carefully to preserve packing materials and store for possible
future use.
b. Remove
any accessories (manuals, cables) packed with unit.
e. Remove Floppy Disk Enclosure from carton and place next to the Desktop Enclosure 2.
d. Check unit for damage.
3. CONNECT FLOPPY DISK ENCLOSURE TO DESKTOP ENCLOSURE 2.
a. Locate the 50 pin flat ribbon cable.
b. Connect one end of the cable to the DISK connector on the rear of th~ Desktop
Enclosure 2.
e. Connect the other end to the DISK connector on th~ rear of the Floppy Disk Enclosure.
4. CONNECT SYSTEM CONSOLE TERMINAL TO DESKTOP
ENCLOSURE 2.
a. Connect the Terminal to TERMINAL 0 connector at rear of Desktop Enclosure 2.
5. IF APPLICABLE, CONNECT THE REMAINING TERMINALS.
6. REMOVE THE FLOPPY DISK ENCLOSURE AND DESKTOP ENCLOSURE TOP COVERS AND CHECK
FOR LOOSE CONNECTORS, AND CORRECT CONFIGURATION (FIGURES 2-2 TO 2-16)
7. CONNECT THE AC POWER CORDS.
8. PERFORM LEVEL 1CHECKOUT TO VERIFY SYSTEM IS WORKING PROPERLY.
2-3

2. INSTALLATION
2-4
816/A
STANDARD SWITCH SETTINGS
CPU 8085/88
-
off Sl on
1 x
2 x
3 x
x 4
x 5
x 6
7 x
x 8
DISK 1 -
off Sl
on off
1 x x
x 2
x 3 x
x 4 x
x 5
x 6
x 7
x 8
DI'l'ERPACm 4 -
off
SI
on
x 1
x 2
x 3
x 4
x 5
x 6
x 7
x 8
Jl.Il\per Settings:
Jl - No shunt
J2 - Bottan installed with Epson
printer / No shunt otherwise
J3 -Top installed wi th Epsorl
printer / No shunt otherwise
J4 - Bottan installed wi th both
Epson and Centronics
J5-J25 -Removed
S2
1
2
3
4
5
6
7
8
off
x
x
x
off S2
on
off
S3
on
x 1 x 1
x 2 2 x
x 3 x 3
x 4 x 4
x 5 x 5
x 6 x 6
x 7 x 7
x 8 x 8
on
x Jl.Il\per
Settings:
J4 - Install a j l.Il\per
Jl6 - Install a j l.Il\per
x on B-C
x
J17 -Jumper A-C
x
x
S2
on off
S3
on
1 x 1 x
2 x 2 x
3 3 x
4 4 x
5 x x 5
6 x x 6
7 x x 7
8 x 8
9 x
10 x
J26 -Jl.Il\per A-B and c-o for
parallel printer Jl.Il\per A-C
and B-O for serial printer.
JSI, JS2, JS3 - Install shunt,
shorting all 8 lines.
JS4 -No connections
JS5 - Connect pins 13-16 to pin 5
JS6 - Connect pins 9-12 to pin 6
Figure 2-2 816/A Standard Switch Settings
COMPUPRO
PRELIMINARY

COMPUPRO
PRELIMINARY
2. INSTALLATION
816/A
SYS'l'D1 SUI'P(Rf I --
off
51
on
x 1
x 2
x 3
4 x
x 5
x 6
7 x
x 8
Junper 5ettiD3s:
JI -- Serial port connection
J2
-- Insert an eight pin dip
shunt, leaving the lower
five pins on the right
side out. Leaving the
first three wires shunted
effectively makes a
3-wire
serial connection.
off
52
on off
53
on
1 x x 1
2 x x 2
3 x x 3
4 x x 4
x 5 5 x
x 6 x 6
x 7 7 x
x 8 x 8
J3 -- Plug an auxiliary battery
cable into this connector,
red wire toward the left.
J8 -- Install an eight pin shunt
J13
-- Insert a shorting plug onto
prongs 8 and
c.
Remaining junpers are left unconnected.
U16 -- Install the -Go 86- EPRCM
lUll 17'5
-- Both Boards
1st 64K
2nd 64K
off
51 on
off
52
on
off
52
on
x 1 x 1 x 1
2 x 2 x 2 x
3 x 3 x 3 x
4 x 4 x 4 x
5 x 5 x 5 x
6 x 6 x 6 x
7 x 7 x 7 x
8 x 8 x 8 x
9 x 9 x x 9
10 x
10
x
10
x
- or --
or -
lUll 16'5
--
lUll 21
1st 64K
2nd 64K
off
51
on
off
Sl
on
off
SI
on
1 x 1 x 1 x
2 x 2 x 2 x
3 x 3 x 3 x
4 x 4 x 4 x
5 x 5 x 5 x
6 x 6 x 6 x
7 x 7 x 7 x
8 x x 8 8 x
Figure 2-3 816/A Standard Switch Settings (Continued) 2-5

2. INSTALLATION COMPUPRO
PRELIMINARY
2-6
816/A
DISK 1
50-PIN FLOPPY DISK
INTERFACER 4 CENTRONICS
INTER
FACER 4
(terminal 2)
INTERFACER 4
(terminal 1)
SYSTEM SUPPORT CONSOLE INTERFACER 4
(printer 1)
(terminal 0)
FOR MAXIMUM COOLING LEAVE EMPTY SLOTS BETWEEN BOARDS.
INTERFACER 4
DISK 1 ~ .fII .• ~ .,
• .t~ INTERFACER 4
.fI. __ ... -. ........ /
, fIoppyso,=- CIIIIII /
i
~I;:~~!!~!~c:~.oJl-·· -je
~."".,
~" .. t.'
•
• •
SYSTEM SUPPORT 1
Figure 2-4 816/A Cable Connections

COMPUPRO
PRELIMINARY 2. INSTALLATION
816/8
STANDARD SWITCH SETTINGS
CPU 8085/88 -
off
SI
on
off
S2
on
off
S3
on
1 x x 1 x 1
2 x x 2 2 x
3 x x 3 x 3
x 4 x 4 x 4
x 5 x 5 x 5
x 6 x 6 x 6
7 x x 7 x 7
x 8 x 8 x 8
OISK 1 off
SI
on
off
S2
on
1 x x 1
x 2 2 x JLI1lper Settings:
x 3 x 3 J4 - Install a j lI11per
x 4 x 4 J16 - Install a junper
x 5 5 x on B-C
x 6 6 x
J17 -Jumper A-C
x 7 7 x
x 8 8 x
DI'I'ERFICP.R 3-5
-
off
SI
on
x 1
2 x
3 x
4 x
x 5
6 x
7 x
8 x
JlI11per Settings:
Jl - Insert a dip shunt, shunting lines 1, 2 and 3 for 3-wire,
no handshaking. Consult manual for hardware hardshaking.
J2 - Insert a dip shunt, shunting lines 1, 2 and 3 for 3-wire,
no hardshaking. Consult manual for hardware handshaking.
JlS - Connect pins 9-16 to pin 5
J16 - Connect pins 1-8 to pin 11
J17 -Jumper two top pins.
Remaining j lI11pers left unconnected.
Figure 2-5 816/8 Standard Switch Settings
2-7

2. INSTALLATION COMPUPRO
PRELIMINARY
2-8
SYSTEM SlJPP(Rl" 1
--
off
Sl
on
x 1
x 2
x 3
4 x
x 5
x 6
7 x
x 8
JlIIlper Settings:
Jl -- Serial port connection
J2 -- Insert an eight pin dip
shunt, leaving the lower
fi ve pins on the right
side out. Leaving the
first three wires shunted
effectively makes a
3-wire serial connection.
MIl 17's
--
816/8
off
S2
on
off
S3
on
1 x x 1
2 x x 2
3 x x 3
4 x x 4
x 5 5 x
x 6 x 6
x 7 7 x
x 8 x 8
J3 -- Plug an auxiliary battery
cable into this connector,
red wire toward the left.
J8 -- Install an eight pin shunt
J13 -- Insert a shorting plug onto
prongs 8 and C.
Remaining jllllpers are left unconnected.
U16 -- Install the "Go 86" EPRCM
ALL BClMOO
1st 64K
2nd 64K
3rd 64K 4th 64K
off
Sl on
off
S2
on off
52 on off
52 on off
52 on
x 1 x 1 x 1 x 1 x 1
2 x 2 x 2 x 2 x 2 x
3 x 3 x 3 x 3 x 3 x
4 x 4 x 4 x 4 x 4
x.
5 x 5 x 5 x 5 x 5 x
6 x 6 x 6 x 6 x 6 x
7 x 7 x 7 x 7 x 7 x
8 x 8 x 8 x x 8 x 8
9 x 9 x x 9 9 x x 9
10 x 10 x 10 x 10 x 10 x
- or --
or-
JWII 16's
--
RM 21's
1st 64K
2nd 64K
3rd 64K
4th 64K 1st 128K 2nd 128K
off 51 on
off 51 on
off 51 on
off 51 on off 51 on off Sl
on
1 x 1 x 1 x 1 x 1 x 1 x
2 x 2 x 2 x 2 x 2 x 2 x
3 x 3 x 3 x 3 x 3 x 3 x
4 x 4 x 4 x 4 x 4 x 4 x
5 x 5 x 5 x 5 x 5 x 5 x
6 x 6 x 6 x 6 x 6 x 6 x
7 x 7 x x 7 x 7 7 x x 7
8 x x 8 8 x x 8 8 x 8 x
Figure 2-6 816/8 Standard Switch Settings (Continued)

COMPUPRO
PRELIMINARY
2. INSTALLATION
816/8
NOTE: THE SYSTEM SUPPORT 1 SYSTEM CONSOLE CABLE (terminal 0) IS NOT
SHOWN IN PHOTO BECAUSE IT IS UNDERNEATH THE OTHER CABLES.
INTERFACER 3
INTERFACER 3 (printer 1)
(printer
0)
INTERFACER 3
(terminal
2)
INTERFACER 3 DISK 1
5O-PIN
FLOPPY DISK CABLE
FOR MAXIMUM COOLING LEAVE EMPTY SLOTS BETWEEN BOARDS •
• INTERFACER 3
INTERFACER 3 INTERFACER 3
SYSTEM SUPPORT 1
Figure 2-7 816/8 Cable Connections 2-9

2. INSTALLATION COMPUPRO
PREll MI NARY
2-10
816/C
CPU 8085/88 -
off
51
on off
52
on
off 53
on
1 x x 1 x 1
2 x x 2 2 x
3 x x 3 x 3
x 4 x 4 x 4
x 5 x 5 x 5
x 6 x 6 x 5
7 x x 7 x 7
x 8 x 8 x 8
DISK I --
off
51
on
off
52
on
1 x x 1
x 2 2 x Jumper Settings:
x 3 x 3 J4
-- Install
a jumper
x 4 x 4
Jl6 -- Install
a jumper
x 5 5 x on B-C
x 6 6 x J17
-- Jumper A-C
x 7 7 x
x 8 8 x
DI'I.'ERFACER 3-8
Jumper Settings:
Jl -- Insert a dip shunt, shunting lines 1,
off
51
on 2 and 3
for 3-wire no handshaking.
x 1 Consult manual
for hardware handshaking.
2 x
J2 -- Insert a dip shunt, shunting lines 1,
3 x 2 and 3
for 3-wire, no handshaking.
4 x Consult manual
for hardware handshaking.
x 5 J1S
-- Connect pins 9-16 to pin 5
6 x J16
-- Connect pins 1-8 to pin 11
7 x J17 -- Jumper two top pins.
8 x Remaining
jLl1lpers left unconnected.
SYS'ftlIt SUPPalT I
off
51
on
off
52
on
off
53
on
x 1 1 x
x-
l
x 2 2 x x 2
x 3 3 x x 3
4 x 4 x x 4
x 5 x 5 5 x
x 6 x 6 x 6
7 x x 7 7 x
x 8 x 8 x 8
JLI1lper Settings:
Jl -- Serial port connection
J2 -- Insert an eight pin dip shunt, leaving the lower five pins on the
right side out. Leaving the first three wires shunted effectively
makes a 3-wire serial connection.
J3 -- Plug an auxiliary battery cable into this connector, red wire
toward
the left.
J8 -- Install an eight pin shunt
Jl3 -- Insert a shorting plug into prongs 8 and C.
Remaining jumpers are left unconnected.
U16 -- Install the "Go 86" EPRa-1.
Figure 2-8 816/C Standard Switch Settings

COMPUPRO
PRELIMINARY
AM 17'5
ALL BOMD5
off
51 on
x 1
2 x
3 x
4 x
5 x
6 x
7 x
8 x
9 x
10 x
AM 16'5
1st 64K
off
51 on
1 x
2 x
3 x
4 x
5 x
6 x
7 x
8 x
AM 21's
-
off
x
2. INSTALLATION
816/C
1st 64K
2nd 54K
3rd 64K
off
52 on
off
S2 on off
S2 on
x 1 x 1 x 1
2 x 2 x 2 x
3 x 3 x 3 x
4 x 4 x 4 x
5 x 5 x 5 x
6 x 5 x 6 x
7 x 7 x 7 x
8 x 8 x x 8
9 x x 9 9 x
10 x 10 x 10 x
4th 64K
5th 64K
5th 64K
off
52
on
off
S2 on off
S2 on
x 1 x 1 x 1
2 x 2 x 2 x
3 x 3 x 3 x
4 x 4 x 4 x
5 x 5 x 5 x
6 x 6 x 6 x
7 x X 7 X 7
x 8 8 x 8 x
x 9 9 x x 9
10
x 10 x 10 x
- or -
2nd 64K
3rd 64K
4th ':;4K
5th 64K
6th 64K
51 on
off
51 on off
51 on
off
SI
on off 51 on
1 x 1 x 1 x 1 x 1 x
2 x 2 x 2 x 2 x 2 x
3 x 3 x 3 x 3 x 3 x
4 x 4 x 4 x 4 x 4 x
5 x 5 x 5 x 5 x 5 x
6 x 6 x 6 x x 6 x 6
7 x x 7 x 7 7 x 7
8 8 x x 8 8 x x 8
- or -
1st 128K 2nd 128K
3rd 128K
off
SI on off
51 on
off
S1
on
1 x 1 x 1 x
2 x 2 x 2 x
3 x 3 x 3 x
4 x 4 x 4 x
5 x 5 x 5 x
6 x 6 x x 6
7 x x 7 7
8 x 8 x 8 x
Figure 2-9 816/C Standard Switch Settings (Continued) 2-11

2. INSTALLATI.ON COMPUPRO
PREll MI NARY
816/C
. NOTE: THE SYSTEM SUPPORT 1 SYSTEM CONSOLE CABLE (terminal 0> IS NOT
SHOWN IN PHOTO BECAUSE IT IS UNDERNEATH THE OTHER CABLES.
INTERFACER 3-
INTERFACER 3 (printer
!NTERFACER 3
INTERFACER 3*
(printer 0)
INTERFACER 3*
DiSK 150-PIN
FLOPPY DISK CABLE
It~TER FACER 3··
herminal 5)
INTERFACER 3**
(terminal 6)
*3-in-1 serial cable: canter of board
**3-in-1 serial cable: right side of boc
FOR MAXIMUM COOLING LEAVE EMPTY SL.OTS BETWEEN BOARDS.
INTERFACER 3 DISK 1
INTERFACER 3
INTERFACER 3
INTER FACER 3
SYSTEM SUPPORT 1
2-12 Figure 2-10 816/C Cable Connections

COMPUPRO
PRELIMINARY
CPU 8086/87
off
51
x 1
x 2
x 3
x 4
x 5
x 6
x 7
x 8
x 9
x 10
-
on off
52 on
off
x 1 x
x 2 x
x 3
x 4
x 5 x
x 6 x
x 7
x 8 x
x 9
x 10
2. INSlALLA liON
816/0 '
53 on
off
54 on
off
55
on
1 x 1 x 1
2 x 2 x 2
3 x 3 x x 3
4 x 4 x x 4
5 5 x x 5
6 6 x x 6
7 x 7 x x 7
8 8 x x 8
9 x x 9
10 x x 10
J8 -No shunt
installed if using 8087 co-processor, otherwise,
install shunt.
off
51
X 1
X 2
X 3
X 4
X 5
X 6
X 7
X 8
X 9
x
10
DISK 1 -
off 51 on
x 1
2 x
3 x
4 x
x 5
6 x
7 x
8 x
DI'J."fJW'M:I! 4
on
off
X
X
X
off
x
x
x
x
x
x
x
-
52
1
2
3
4
5
6
7
8
9
10
51
1
2
3
4
5
6
7
8
on
X
X
X
X
X
X
X
on
off
52 on
x x 1
2 x Jumper
Settings:
x 3
J4 -- Install
a jl..ltlper
x 4
J16 - Install
a jl..ltlper
5 x on B-C
6 x J17 -Jumper s-c
7 x
8 x
Jl..Itlper Settin;s:
Jl -- Insert a dip shunt, shunting lines 1, 2
and 3 for 3-wire no handshaking. Consult
manual for hardware handshaking.
J2 -- Insert a dip shunt, shunting lines 1, 2
and 3 for 3-wire, no handshaking. Consult
manual for hardware handshaking.
J1S -- Connect pins 9-16 to pin 5
J16 -- Connect pins 1-8 to pln 11
J17 -- Jl..Itlper b«> top pins.
Remaining jl..ltlpers left unconnected.
Jl..Itlper Settings: Jl -- No shunt
off
53
J2 - Bottan installed wi th Epson
on
printer/No shunt otherwise.
X 1
J3 -- Top installed with Epson
X 2
printer/No shunt otherwise.
X 3
J4 -- Bottom installed wi th both
X 4 Epson and
Centronics
5 X
J5-J25 - Removed
6 X J26 -Jl..Itlper
A-B and c-o
7 x
JS1, JS2, JS3 -- Install shunt,
8 X
sbortin; all 8 lines.
JS4 - No connections
JS5 -- Connect pins 13-16 to pin 5
JS6 -'Connect pins 9-12 to pin 6
Figure 2-11 816/0 Standard Switch Settings
2-13

2. INSTALLATION
816/0
COMPUPRO
PRELIMINARY
S!S'l'!M SlJPlI(RI' 1
--
off 51
on
x 1
x 2
x 3
4 x
x 5
x 6
7 x
x 8
JlJnper Settings:
Jl -- 5erial port connection
J2 -- Insert an eight pin dip
shunt, leaving the lower
fi ve pins on the right
side out. Leaving the
first three wires shunted
effectively makes a
3-wire serial connection.
RAM16's
off
52 on
off
53
on
L x x 1
2 x x 2
3 x x 3
4 x x 4
x 5 5 x
x 6 x 6
x 7 7 x
x 8 x 8
J3 -- Plug an auxiliary battery
cable into this connector,
red. wire toward the left.
J8 -- Install an eight pin shunt
J13 -- Insert a shorting plug onto
prongs 8 and C.
Remaining jumpers are left unconnected.
U16 -- Install the "Go 86" EPROM
1st 64K
2nd 64K 3rd 64K 4th 64K
5th 64K
6th 64K
7th 64K
8th 64K
off 51 on
off 51 on off 51 on
off 51 on
off 51 on
off 51 on
off 51 on
off 51 on
1 x 1 x 1 x 1 x 1 x 1 x 1 x 1
2 x 2 x 2 x 2 x 2 x 2 x 2 x 2
3 x 3 x 3 x 3 x 3 x 3 x 3 x 3
4 x 4 x 4 x 4 x 4 x 4 x 4 x 4
5 x 5 x 5 x 5 x 5 x 5 x 5 x 5
6 x 6 x 6 x 6 x x 6 x 6 x 6 x 6
7 x 7 x x 7 x 7 7 x 7 x x 7 x 7
8 x x 8 8 x x 8 8 x x 8 8 x x 8
RAM 21's
--
M-Drive B --
1st 128K
2nd 128K 3rd 128K
4th l28K 1st 5121<
2nd 5121<
3rd 5121<
off 51 on
off 51 on off 51 on off 51 on
off 51 on
off 51 on
off 51 on
2-14
1 x 1 x 1 x 1 x x 1 x 1 x 1
2 x 2 x 2 x 2 x x 2 x 2 x 2
3 x 3 x 3 x 3 x 3 x 3 x 3
4 x 4 x 4 x 4 x 4 x 4 x 4
5 x 5 x 5 x 5 x 5 x 5 x 5
6 x 6 x x 6 x 6 x 6 x 6 x 6
7 x x 7 7 x 7 x 7 x 7
·X
7
8 x 8 x 8 x 8 x 8 x 8 x 8
9 x 9 x x 9
10
x x 10 10
2) In addition to the switch settings and jumper settings already
listed for the System Support board, you .ust also make the
following modification:
Pull IC28 out of its socket, bend pin 4 out so that when
replacing the IC it does not make contact with the socket or any
other pins. Without this modification, MP/M 86 ·will not work with
the CPU 8086.
Figure 2-12 816/0 Standard Switch Settings (Continued)
x
x
x
x
x
x
x
x
x
x