IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF) IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
Asynchronous Communications Adapter Connector Interface Specifications REAR PANEL /""\ \\ External Device _OCZ5 o ~ 0~ AT STANDARD TTL LEVELS Description ... .... ... , NC Transmit Data Receive Data Request to send Clear to send Data set ready Signal ground Carrier detect ... +Transmit current loop return (20 rna) ~ NC ....L .... -Transmit current loop data (20 rna) NC NC NC NC NC NC +Receive current loop data (20 rna) NC Data Terminal Ready NC Ring Indicate NC NC - Receive current loop return (20 rna) Pin 1 2 3 .. 4 5 .. r' 6 .. 7 8 .. 9 0 • 25 • • • • • • 14 • 0 10 11 Asynchronous 12 Communications 13 Adapter 14 (RS232C) 15 16 17 18 ... 19 20 21 22 23 • 24 25 .. .. NOTE: To avoid inducing voltage surges on interchange circuits, signals from interchange circuits shall not be used to drive inductive devices, such as relay coils. 2-147
2-148 NOTES
- Page 116 and 117: Command Summary (continued) DATA B
- Page 118 and 119: Command Summary (continued) DATA B
- Page 120 and 121: Table 15. Status Register I BIT NO.
- Page 122 and 123: Table 17. Status Register 3 BIT NO.
- Page 124 and 125: ~ ~ +AO-9 +AEN -lOW -lOR -DACK2 +T
- Page 126 and 127: Adapter Inputs -Index -Write Protec
- Page 128 and 129: 5-1/4" Diskette Drive Adapter Exter
- Page 130 and 131: (3) The write-protect sensor disabl
- Page 132 and 133: Memory Expansion Options Two Memory
- Page 134 and 135: Switch - Configurable Start Address
- Page 136 and 137: Game Control Adapter The Game Co
- Page 138 and 139: I/O Channel Description A9-AO: D7-D
- Page 140 and 141: ) ) ) 15 PIN MALE '0' SHELL c....t
- Page 142 and 143: Asynchronous Communications Adapter
- Page 144 and 145: Modes of Operation The different mo
- Page 146 and 147: I TRANSMIT 'IACUIT I +5V ~ 4S-"l Tx
- Page 148 and 149: INS8250 Functional Pin Description
- Page 150 and 151: Data Set Ready (DSR), Pin 37: When
- Page 152 and 153: Input/Output Signals Data (D7-DO) B
- Page 154 and 155: Bit 3: This bit is the Parity Enabl
- Page 156 and 157: Table 23. BAUD RATE AT 1.843 Mhz De
- Page 158 and 159: Interrupt Identification Register T
- Page 160 and 161: Interrupt Enable Register This 8-bi
- Page 162 and 163: In the diagnostic mode, the receive
- Page 164 and 165: Transmitter Holding Register The T
- Page 168 and 169: SECTION 3. ROM and SYSTEM r", USAGE
- Page 170 and 171: MOV AH,l ;function is to set time o
- Page 172 and 173: Vectors With Special Meanings Inter
- Page 174 and 175: BIOS Memory Map STARTING ADDRESS H
- Page 176 and 177: The timer is set mode 3 which means
- Page 178 and 179: Keyboard Encoding and Usage Encodin
- Page 180 and 181: Keys 71-83 have meaning only in bas
- Page 182 and 183: ALT - Temporarily shifts keys 2-13,
- Page 184 and 185: Keyboard Usage This section is inte
- Page 186 and 187: Table 28. BASIC Screen Editor Speci
- Page 188 and 189: Low Memory Maps (O-'0600'x) Table 3
- Page 190 and 191: BASIC Workspace Variables If you do
- Page 192: APPENDICES Contents: Appendix A: RO
- Page 195 and 196: lOC OBJ LINE SOURCE STITlE( ROM BIO
- Page 197 and 198: LOC OBJ LINE SOURCE 0068 ?! 155 De
- Page 199 and 200: LOC OBJ LINE SOURCE E09E BBf5 EOAO
- Page 201 and 202: lOC OBJ LINE SOURCE £179 E2FD 462
- Page 203 and 204: LOC OBJ LINE SOURCE E278 7408 612 J
- Page 205 and 206: lOC OBJ LINE SOURCE 755 ; ---------
- Page 207 and 208: LOC OSJ LINE SOU RCE E42B 7440 900
- Page 209 and 210: lOC OBJ LINE SOURCE ESIE 884000 E52
- Page 211 and 212: LaC OBJ LINE SOURCE E613 803E120001
- Page 213 and 214: LaC OSJ LINE SOURCE E6EC eSOAOE E6E
- Page 215 and 216: LaC OBJ LINE SOURCE E7SF 1505 .402:
2-148 <br />
NOTES
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