IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

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System Board Component Diagram READ ONLY MEMORY SYSTEM EXPANSION 110 SLOTS r -Jl-J-2~-:--J4-~ rJ I I : ," I I I CASSETTE 110 KEYBOARD 110 :: , b , Q 0 SYSTEM P2 'Q I : ~ CLOCK CHIP I ,. TRIMMER I~AUX BOARD PROCESSOR SOCKET =1 =2 m 1 - INTEL 80S8 0~ n~ n n :w.~- :::::~SOR U U U CONFIGURATION 16-64 KB o READ/WRITE MEMORY '\ o00000 00 ""~""" 00000000 0000000 o DOODDDDDDDDOODD o 00000000 0000000 o D~~DD~,,~,~ DOD 00 SPEAKER OUTPUT MIC OR AUX SelECT Figure 4. SYSTEM BOARD COMPONENT DIAGRAM 2-13
Keyboard The Keyboard is a device separate from the System Unit. Itis attached via a serial interface cable approximately 6 feet in length which plugs into the rear ofthe System Unit. The attaching cable is coiled, like that of a telephone headset, and is a shielded four-wire wire connection. The interface contains power ( +5 Vdc), ground and two bidirectional signal lines. The cable is permanently attached at the keyboard end and plugs into the System Unit via a DIN connector. The keyboard' uses a capacitive technology with a microcomputer (Intel 8048) performing the keyboard scan function. The keyboard is packaged in a low-profile enclosure with a tilt adjustment for 5 degree or 15 degree orientations. The keyboard contains 83 keys laid out in three major groupings. The central portion of the keyboard contains a standard typewriter keyboard layout. On the left side, arranged as a 2x5 block, are 10 function keys. These keys are user-defined by software. On the right is a l6-key, key pad area. This areais, defined by the software but contains legends for the functions of numeric entry, cursor control calculator pad screen edit. The keyboard interface is defined so system software has the maximum flexibility in defining keyboard operations such as shift states of keys, make/break keys, and typematic operation. This is accomplished by having the keyboard return scan codes rather than American National Standard Control Characters (ASCII) codes. In addition, all keys except control keys are typematic and generates both a make and a break-scan code. For example, key 1 produces scan code 01 on make, and code 81 on break. Break codes are formed by adding X'80' to make codes. The keyboard I/O driver can define keyboard keys as shift keys or typematic as required by the application. The microcomputer (Intel 8048) in the keyboard performs several functions including a Power-on Self-test and when requested by the System Unit This diagnostic CRC checks the microcomputer ROM, tests memory and checks for stuck keys. Additional functions are: keyboard scanning, key debounce, buffering of up to 20 key scan codes, maintaining bidirectional serial communications with the System Unit, and executing the hand shake protocol required by each scan code transfer. A keyboard diagram and table of scan codes are on the following pages. Figure (5) is a block diagram of the keyboard interface on the System Board. 2-14
Page 1: April 2011 IMPORTANT 1. The motherb
Page 5 and 6: FEDERAL COMMUNICATIONS COMMISSION R
Page 8 and 9: CONTENTS SECTION 1. HARDWARE OVERV
Page 10 and 11: Programming Considerations ........
Page 12 and 13: INS 8250 Functional Pin Description
Page 14 and 15: FIGURE LISTING 1. System Block Dia
Page 16 and 17: SECTION I. HARDWARE OVERVIEW The
Page 18 and 19: The 16KB Memory Expansion Kits allo
Page 20 and 21: SECTION 2. HARDWARE ~ Contents: Sys
Page 22 and 23: SYSTEM BOARD The System Board fits
Page 24 and 25: The memory is dynamic 16K x 1 chips
Page 26 and 27: System Board Data Flow Figure 2. S
Page 28 and 29: 1/0 Channel Diagram REAR PANEl SI
Page 30 and 31: I/O CHRDY I I/O Channel Ready: This
Page 34 and 35: Keyboard Interface B lock Diagram
Page 36 and 37: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Page 38 and 39: Cassette User Interface The cassett
Page 40 and 41: Cassette Interface Connector Specif
Page 42 and 43: I/O Address Map HEX RANGE 9 8 7 6
Page 44 and 45: System Memory Map X'OOOOO' 16 TO 6
Page 46 and 47: System Memory Map Cont. START ADDR
Page 48 and 49: 5-1/4" Diskette Drives Switch Setti
Page 50 and 51: 32/64KB Memory Expansion Option Sw
Page 52 and 53: Power Supply The system DC power su
Page 54 and 55: N I ~ VI ) § I • \. ~ o el so.
Page 56 and 57: IBM Monochrome Display and Parallel
Page 58 and 59: System Channel Interface Lines Used
Page 60 and 61: Programming Considerations Programm
Page 62 and 63: • CRT Status Port (I/O Address '3
Page 64 and 65: Color/Graphics Monitor Adapter The
Page 66 and 67: CPU .. r-- ) ) ) DISPLAY ADDRESS BU
Page 68 and 69: Modes of Operation There are two ba
Page 70 and 71: IBM Monochrome Display Adapter V s.
Page 72 and 73: Color selection is determined by th
Page 74 and 75: 1"'"""""\ Table 5. I R G B Summary
Page 76 and 77: Programming the Mode Control and St
Page 78 and 79: Bit 5 When on, this bit will change
Page 80 and 81: I/O Address and Bit Map Read/Write
Page 82 and 83:
Color/Graphics Monitor Adapter Auxi
Page 84 and 85:
Parallel Printer Adapter The Printe
Page 86 and 87:
Programming Considerations The Prin
Page 88 and 89:
Parallel Printer Adapter Interface
Page 90 and 91:
Table 7. Printer Specifications (1
Page 92 and 93:
Table 9. Functions and Conditions o
Page 94 and 95:
Table 10. Connector Pin Assignment
Page 96 and 97:
(4) Data transfer sequence Fig. 17
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ASCII Control Codes Control Codes V
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(8) DC 2 (Device Control 2) The DC
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(b) 3) ESC 2 (Escape 2) Receipt of
Page 104 and 105:
ehaves like the LF code. Therefore,
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[DATA] IESCGI ABCDEFGHI [PRINT] ABC
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5 1/4-Inch Diskette Drive Adapter T
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~ Functional Description From a pro
Page 112 and 113:
The FOe is capable of performing 15
Page 114 and 115:
Table 13. Symbol Descriptions (cont
Page 116 and 117:
Command Summary (continued) DATA B
Page 118 and 119:
Command Summary (continued) DATA B
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Table 15. Status Register I BIT NO.
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Table 17. Status Register 3 BIT NO.
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~ ~ +AO-9 +AEN -lOW -lOR -DACK2 +T
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Adapter Inputs -Index -Write Protec
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5-1/4" Diskette Drive Adapter Exter
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(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
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I/O Channel Description A9-AO: D7-D
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) ) ) 15 PIN MALE '0' SHELL c....t
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Asynchronous Communications Adapter
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Modes of Operation The different mo
Page 146 and 147:
I TRANSMIT 'IACUIT I +5V ~ 4S-"l Tx
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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
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Bit 3: This bit is the Parity Enabl
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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
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In the diagnostic mode, the receive
Page 164 and 165:
Transmitter Holding Register The T
Page 166 and 167:
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,
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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 ; ---------
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LOC OSJ LINE SOU RCE E42B 7440 900
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lOC OBJ LINE SOURCE ESIE 884000 E52
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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:
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LaC OBJ LINE SOURCE 1659 ASSUME CS:
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LOC OBJ LINE SOURCE E994 8E08 1798
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LOC 08J LINE SOURCE £"91 474849 EA
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LaC OBJ LINE SOURCE E890 E99700 E89
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LOC 08J LINE SOURCE 2255 ;-- INT 13
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LOC OS! LINE SOURCE 2407 ;------ DI
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lOC OBJ LINE SOURCE (Eol 7438 fE03
Page 231 and 232:
LOC OBJ LINE SOURCE Ef'tD £67200 2
Page 233 and 234:
LOC OBJ LINE SOURCE 2870 I ~- -----
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LOC (lBJ LINE SOURCE 3007 j --- INT
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laC OBJ LINE SOURCE 3157 (AH}=6 SCR
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lOC OBJ LINE SOURt.:E FOA43828ZDOAI
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lOC OBJ LINE SOURCE FtC7 3458 VIDEO
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LOC OBJ LINE SOURCE F260 750E f2:62
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LOC OBJ LINE SOURCE F32B 06 3760 PU
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LOC OBJ LINE SOURCE F3Cl 3910 NEAR
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laC OBJ LINE SOURCE 1'460 80HfE F46
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LOC OBJ LINE SOURCE F4FF BSFB 4213
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LOC OBJ LINE SOURCE 4359 j------ IM
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LOC OBJ LINE SOURCE F689 57 4511 PU
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lOC OBJ LINE SOLIRCE 4662 THE 0 COL
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LOC OBJ LINE SOURCE F7Cl 8AC4 F7e]
Page 261 and 262:
LaC OBJ LINE SOURCE F840 4967 EQUIP
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LOC OBJ LINE SOURCE F8DA E304 5116
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LOC OBJ LINE SOURCE F97E EBF9 5268
Page 267 and 268:
LOC OBJ LINE SOURCE H20 C3 5415 RET
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LOC OBJ LINE SOURCE fC46 0030300000
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LOC OBJ LINE SOURCE FEBS 833E6E0018
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lOC OBJ LINE SOURCE 5866 ;.*.-•
Page 275 and 276:
A-82 NOTES
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8088 REGISTER MODEL AX: AH Al ACCUM
Page 279 and 280:
MEMORY SEGMENTATION MODEL LOGICAL
Page 281 and 282:
XCHG =Exchange RegisterImemory with
Page 283 and 284:
SBB = Subtract with borrow Reg./mem
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AND = And Reg./memory and register
Page 287 and 288:
Indirect within segment 11111111 mo
Page 289 and 290:
8088 CONDITIONAL TRANSFER OPERATION
Page 291 and 292:
BOBBINSTRUCTION SET MATRIX LO HI 0
Page 293 and 294:
INSTRUCTION SET INDEX Mnemonic Pag
Page 295 and 296:
VALUE AS CHARACTERS AS TEXT ATTRIBU
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Character Set (OO-7F) Quick Referen
Page 307 and 308:
C-14 NOTES
Page 309 and 310:
SYSTEM BOARD (PROCESSOR AND SUPPORT
Page 311 and 312:
SYSTEM BOARD (DEVICE DECODES) I~ i
Page 313 and 314:
SYSTEM BOARD (ROS AND BUS DRIVER) ~
Page 315 and 316:
Ṉ-0 SYSTEM BOARD (DYNAMIC MEMORY
Page 317 and 318:
SYSTEM BOARD (KEYBOARD/SENSE/CONTRO
Page 319 and 320:
\:j I " m < -tv CI:I Q » :11:1 Q P
Page 321 and 322:
I- z ..... 0 t:::I 0 ... ;:; ~ r
Page 323 and 324:
tl I-0'1 ," r-" "~ (S"T" 'RESET I E
Page 325 and 326:
~ ~ ~ ~ ~~ IBM MONOCHROME DISPLAY A
Page 327 and 328:
tj III ~ N 14L.517') ~ 0 __________
Page 329 and 330:
~ N s: N CI CO J ~ CI 2 A Y 18 n DA
Page 331 and 332:
IBM MONOCHROME OISPLAY DANGER HAZAR
Page 333 and 334:
COLOR/GRAPHICS MONITOR ADAPTER ~
Page 335 and 336:
1'. -- COLOR/GRAPHICS MONITOR ADAPT
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1 COLOR/GRAPHICS MONITOR ADAPTER :;
Page 341 and 342:
PARALLEL PRINTER ADAPTER D-34
Page 343 and 344:
t:l +AEN AND U'I GATE , ., + ENABL
Page 345 and 346:
t:! W CI CHARGE PUMP 00 AOI en U ~I
Page 347 and 348:
5%" DISKETTE DRIVE .., CI -N ... ';
Page 349 and 350:
t:j ~ N o W z N ;:1'1: ~ aZKO: ." R
Page 351 and 352:
32KB MEMORY EXPANSION d-w- I NNO) 3
Page 353 and 354:
64 ~~ MEMORY EXPANSION ~~ D-46
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BO~ t::l azq +';V[)( +'>vOC 'f c+o;
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D-50 NOTES
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IBM Monochrome Display Size: Length
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12. Binary: (1) Pertaining to a sel
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40. Hertz (Hz.): A unit offrequency
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70. OR: A logic operator having the
Page 367 and 368:
G-8 NOTES
Page 369 and 370:
Other Related Publications 7. NATIO
Page 371 and 372:
Page 373 and 374:
Character Codes 3-11 Generator 2-
Page 375 and 376:
DIN (Connectors) 2-5 DIP (Dual In-L
Page 377 and 378:
Game Control Adapter (continued) C
Page 379 and 380:
I/O (Input/Output) Address Map 2-33
Page 381 and 382:
Microsecond 2-3 Mnemonic B-18 Mod
Page 383 and 384:
Parameters, 6845 Initialization 2-4
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Read/Write Memory (continued) Grap
Page 387 and 388:
s Scan Codes 2-17 Screen 2-43 Sche
Page 389 and 390:
u Unit Specifications Appendix E
Page 391 and 392:
1-22 NOTES
Page 393:
III"I UNITED NO POSTAGE NECESSARY
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IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

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