Compaq LTE Elite, Maintenance And Service Manual

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56 Ground 155 Unlatched Address Bit 19
57 DMA Request 5 156 Unlatched Address Bit 20
58 DMA Request 3 157 Unlatched Address Bit 21
59 DMA Request 2 158 Ground
60 Ground 159 Unlatched Address Bit 22
61 DMA Request 0 160 Unlatched Address Bit 23
62 DMA Acknowledge 7 * 161 System Address Bit 0
63 DMA Acknowledge 6 * 162 Ground
64 Ground 163 System Address Bit 1
65 DMA Acknowledge 5 * 164 System Address Bit 2
66 DMA Acknowledge 3 * 165 System Address Bit 3
67 Expansion Base Present 166 Diskette Drive Select *
68 Reserved 167 Diskette Low Density *
69 Ground 168 High Density
70 Reserved 169 External Diskette Connected *
71 Diskette Write Protect * 170 Tape Select *
72 Diskette Write Data * 171 Ground
73 Ground 172 Diskette Motor *
74 Diskette Step * 173 16-Bit I/O Cycle *
75 Diskette Track 0 * 174 Low Memory *
76 Reset 175 Ground
77 Ground 176 Memory Read Control *
78 System Data Bit 15 177 Memory Write Control *
79 System Data Bit 14 178 16-Bit Memory Cycle *
80 System Data Bit 13 179 Ground
81 Ground 180 Bus Master Grab *
82 System Data Bit 12 181 Byte High Enable *
83 System Data Bit 11 182 Refresh *
84 System Data Bit 10 183 Ground
85 Ground 184 Interrupt Request 15
86 System Data Bit 9 185 Interrupt Request 14
87 System Data Bit 8 186 Interrupt Request 12
88 System Data Bit 7 187 Ground
89 System Data Bit 6 188 Interrupt Request 11
90 Ground 189 Interrupt Request 10
91 System Data Bit 5 190 Interrupt Request 9
92 System Data Bit 4 191 Interrupt Request 7
93 System Data Bit 3 192 Ground
94 Ground 193 Interrupt Request 6
95 System Data Bit 2 194 Interrupt Request 5
96 System Data Bit 1 195 Interrupt Request 4
97 System Data Bit 0 196 Reserved
98 Ground 197 Interrupt Request 3
99 DMA Terminal Count 198 Sense Computer Present
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* Active low
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IMPORTANT: There are differences between the pin-outs for the 198-pin
external options connector on the Compaq LTE Elite and the
Compaq SmartStation.