HP Vectra Reference Manual page 243

digital control register 48
digital input register 49
digital output register 47
direct connect [RGB] monitor
connector
[J
1] pin assignment table
6.384
direct memory access controller 23
- direction 51
DISC CHG 52
disc drive 103
display access; alpha, graphics table
6.687
divisor latch 125
divisor latch register, LSM and MSB
125
DMA23
DMA controller, clock cycle 23
DMA port assignments table 2.3 26,27
drive performance 107, HP45816A
table 9.6 112, HP45817A table 9.7
114
drive to controller interface,
HP45816A 113
drive to controller interface,
HP45817A 114
DRQO-DRQ3 32
DRQ5-DRQ7 32
- DS1 51
- DS2 51
E
EC44
ED 44
EE 44
E1 44
E244
E344
E744
E844
-ERROR 136
extension control register 85,86
F
fan 77
FDC data register 49
FDC to disc drive interface 49
FDC function 46
FDC jumper configuration fig. 12 45
FDC status reg ister 48
flexible disc controller subsystem 36,44
flexible disc drive 44
flux change 52
G
graphics mode 86,89
graphics mode, data format 89
H
hard disc subsystems 109
hard disc subsystem, HP45816A 20MB
112, HP45817A 40MB 113
hardware interface Intel 80287 100,
1.2MB FDD 108, 360K 105,
HP45816A 109, HP45817A 109
- HEAD SELEG 51
HP45812A 1.2Mb 104,105
HP45816A 20MB, drive performance
table 9.6 112
HP45817A drive performance table
9.7 114
HP45981 A to system pin assignments
table 6.1 83
HP-Human interface link 55
HP-HIL 55
HP-HIL interface 57
HP-HIL pin assignments table 4.1 58
HP Vectra drive cage fig. 21 103
HP Vectra keyboard [Eng.] fig. 14 60
HPINT 56
humidity 4
-INDEX 52
index register 90
-INIT 138
initial chip values table 6.7 90
input 75
input device interface 20
input line 57
Intel 80286, compatibility 1
Intel 80287 99
Intel 8254 18
Intel 8259A 20
internal components fig. 2 3
internal flexible disc drive HP45812A
104,105
internal flexible disc drive,
performance 360KB table 9.1 104
Index