Zenith Z-100 Series, Technical Manual

Page: 489 / 493

Page 11.3
INDEX
S-100 bus interface, 6.23
Semiconductor identification, 6.39
Signal definitions, 6.50
Status port, 6.21
Status port bit definitions, 6.10
Theory of operation, 6.21
Track formats, 6.11
Troubleshooting, 6.32
Vector interrupt lines, 6.4, 6.24
Write command register (1797), 6.28
Write control latch, 6.27
X-Ray View, 6.49
Floppy drives 5 1/4", 7.1
Cable connections, 7.5
Description, 7.2
Diskette handling, 7.6
Diskette loading, 7.6
Operation, 7.6
Programming, 7.3
Programming plugs, 7.4
Terminator IC's, 7.4
Write-protect, 7.7
Flyback transformer, 5.2
G
GDOTA, 4.55
Initialization sequence, 10.14
Interconnect pin definitions,
Main board, 2.137
Keyboard, 2.139
Light pen, 2.139
Parallel port, 2.138
RS-232, 2.137
S-100 bus, 2.137
Video logic board, 2.141
Video logic board, 4.109
Power Supply connectors, 2.144
Interleaving, 6.12
Interrupt 8259A (FO-F3), 2.15
Interrupt circuitry, 2.69
General, 2.69
Interrupt routine, 2.74
Maskable interrupt sequence, 2.70
Nonmaskable interrupt sequence, 2.73
I/O circuitry, 2.82
I/O port decoder, 2.90
General, 2.82
Parallel port, 2.86
Printer port, 2.87
Light pen port, 2.88
Serial port A, 2.82
Serial port B, 2.85
Video interrupt port, 2.89
IO.SYS, 10.18
H
Handshake, 2.84, 2.87
High address latch (FD), 2.10
Horizontal sync, 5.2
Jumpers — floppy disk controller, 6.3, 6.4
Jumpers — main board, 2.4
Jumpers — video logic board, 4.3