Compaq LTE Elite, Maintenance And Service Manual

Page: 323 / 387

Table A-7. Compaq SmartStation 198-Pin External Options Connector
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Pin
Signal Pin Signal
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1 Printer Select 100 +5V Fused (computer)
2 Printer Busy 101 Printer Auto Line Feed *
3 Printer Data Bit 7 102 Printer Error *
4 Printer Data Bit 5 103 Ground
5 Ground 104 Printer Initialize *
6 Printer Data Bit 3 105 Diskette Write Gate *
7 Printer Data Bit 1 106 Diskette Read Data *
8 Printer Strobe * 107 Ground
9 +5V from Main Exp. Base 108 Power On *
10 Battery Voltage 109 Exp Device Connected *
11 Power Good Exp. Base 110 I/O Error Check *
12 Standby 111 Ground
13 Mouse Data 112 System Address Bit 4
14 Battery Voltage 113 System Address Bit 5
15 CRT-Red Analog 114 System Address Bit 6
16 CRT-Green Analog 115 Ground
17 CRT-Blue Analog 116 System Address Bit 7
18 CRT Horizontal Sync 117 System Address Bit 8
19 CRT Vertical Sync 118 System Address Bit 9
20 Ground 119 Ground
21 Serial-Data Term Ready 120 System Address Bit 10
22 Serial-Ring Indicator 121 System Address Bit 11
23 Serial Transmit Data 122 System Address Bit 12
24 Serial Clear-to-Send 123 System Address Bit 13
25 Ground 124 Ground
26 Serial Receive Data 125 System Address Bit 14
27 Serial Ready-to-Send 126 System Address Bit 15
28 Serial Carrier Detect 127 System Address Bit 16
29 Serial-Data Set Ready 128 Ground
30 Ground 129 System Address Bit 17
31 DMA Acknowledge 2 * 130 System Address Bit 18
32 DMA Acknowledge 1 * 131 System Address Bit 19
33 DMA Acknowledge 0 * 132 Ground
34 +5V Fused (computer) 133 Printer Select In *
35 Printer Paper Out 134 Diskette Boot
36 Printer Acknowledge * 135 Diskette Low Den. Media *
37 Printer Data Bit 6 136 Diskette Direction In *
38 Printer Data Bit 4 137 Ground
39 Ground 138 Diskette Index *
40 Printer Data Bit 2 139 Diskette Change *
41 Printer Data Bit 0 140 Diskette Head Select
42 Keypad Data 141 Ground
43 Battery Voltage 142 Reserved
44 Keyboard Clock 143 No Wait States *
45 Keyboard Data 144 Bus Ready
46 Mouse Clock 145 Ground
47 Battery Voltage 146 I/O Read Control *
48 Ground-CRT 147 I/O Write Control *
49 Ground-CRT 148 ISA Bus Clock
50 Ground-CRT 149 Ground
51 Ground-CRT 150 Address Latch Enable
52 Ground-CRT 151 DMA Cycle Indicator
53 DMA Request 1 152 Unlatched Address Bit 17
54 DMA Request 7 153 Ground
55 DMA Request 6 154 Unlatched Address Bit 18