SECTION
NUMBER
II
III
IV
V
VI
TABLE
OF
CONTENTS
INTRODUCTION .
System Overview .
DISASSEMBLY/REASSEMBLY .
Disassembly .
Reassembly .
CPU
CIRCUIT BOARD " .
Technical Description .
Video Sync Circuits .
Processor .
RAM
.
Address Decoding .
Memory
Map
.
10
PO
RT
Description .
Video , .
Keyboard .
Cassette Interface . . . . . . . . . . . . . . . . . . . . . . . . .
Line
Printer and
Real
Time Clock .
10
Bus
.
Adjustments and Jumper Positions .
Model III
10
Bus
Detailed Description .
Model
III
PO
RT
Bits .
CPU
Module Parts
list
. . . . . . . . . . . . . . . . . . . . . . . .
FLOPPY DISK INTERFACE .
Technical Description .
Control and Data Buffering .
Non
-Maskable Interrupt Logic .
Drive Select Latch and Motor
On
Logic .
Wait
State Generation and WAITIMOUT Logic .
Clock Generation Logic .
Disk
Bus
Selector Logic .
Read/Write Data Pulse Shaping Logic .
Disk
Bus
Output Drives .
Write Precompensation and Clock Recovery
logic
.
Floppy
Disk
Controller Chip .
Adjustments and Jumper Options .
Floppy Disk Interface
PC
Board Parts
list
.
RS-232C CIRCUIT BOARD .
RS-232C Technical Description .
Pin
-Out Description .
Port and Bit Assignments .
RS-232C
PC
Board Parts
list
.
POWE
R SUPPLY .
Functional Specifications .
Troubleshooting .
Set-Up Procedures .
Visual Inspection . . . . . . . . .
Start-Up .
No
Output .
Performance Test .
Power Supply Component Values .
PAGE
NUMBER
1
3
5
7
9
11
13
13
13
13
14
14
15
16
17
17
18
18
18
19
21
25
41
43
43
43
43
44
44
44
44
44
44
45
45
49
53
55
56
57
62
65
67
67
67
67
68
68
69
70
To Next Page
Loading...
