IBM 5150 Hardware Reference Manual

LOC OBJ
LINE SOURCE
0068 ?!
155
De
;LAST INPUT VALUE
156
157 1------------------------ ---- _______________ _
158 ; TIMER DATA AR€A
159 ----------------- __________________________ _
Ot6C ?1!'!
160
TlI1ER_LOW
0"
j lOW WORD OF TIMER COUHT
006£ ????
161
TIMER_HIGH
ow
; HIGH WORD OF TIMER COUNT
0070 ?!
162 TINER_OFL
De
; TIMER HAS ROllED OVER SINCE LAST READ
163 ;COUNTS.SEC
lOU
18
16'
,COUNTS.NIH
EQU
1092:
165
iCOUtlTS_HOUR
lOU 65543
166
; COUNTS_DA. Y
EOU
1513040 = 1800BOH
167
168 i ------------------------- ________________ • __
169 ; SYSTEM DATA AREA
170 ; --- - - ---------- ____________________________ _
0071 ??
171 BIOS_BREAK DB
; BIT 7 = 1 IF BREAK HY HAS BEEN DEPRESSED
0072 ????
172 RESET_FLAG OW
; WORD = 1234H IF KEYBOARD RESET UNDERWAY
173
OATA WOS
174
175 ; -----~-':' _ _: .•. ---. ____________________________ _
176 J EXTRA DATA AREA
177 1--------------------- -----------------------
'0050
178 XXDATA SEGMENT AT 50H
O~OO 11
179
STATUS_BYTE DB
18. XXOATA ENDS
181
18Z ; --------------------------------------------
183 J VIDEO DISPUY BUFFER
184 ; -------- -- - -- - - - - - - - - ------ ---- ---- ------ ---
8800
18S VIDEO_RAM SEGMENT AT OBaOOH
'0000
186 REGEN LABEL BYTt
0000 187
REGENW LABEL WORD
(1000 (16}84 ??)
188 DB 1638't DUPl?)
189
ENIlS
190 i ---------- -------- ------------------------
191 ; ROM RESIDENT CODE
19'
; ---- - --- ----------- --- --- ---------------- --
fOOD
193 CODE SEGMENT AT OFOOOH
0000 (51344 111
19. DB 57344 DUP(?) j FI LL LOWEST 56K
, 195
:EOOO 35373030303531
196
08 '5700051 CDPR. IBM 1981' I COPYRIGHT NOTICE
20434F50522E20
49424020313938
31
197
198 ; ------------------- -------------------------
199 j INITIAL RELIA8ILITY TESTS -- PHASE 1
200 ; --- - - - - - - --- - ------ - -- - - - -- - ------------- ---
201 ASSUME CS:COOE,SS:COOE,ES:ABSO,OS:DATA
202 ; ------------- ------ -------------------------
203 DATA DEfINITIONS
2.04 J - - ---- -- ----------- - -- ----- - ---------- -- - ---
E016 D8EO 205 Cl
Cll
• RETURN ADDRESS
0"
E016 EDEI
'06
C' 0"
C"
i PETlmtl ADDRESS FOR DUMMY STACK
207 ; ---- ----- ---------- --- - --- ------------ - - ----
lOS THIS SUBROUTINE PERFORMS A READ/WRITE STOOAGE TEST ON A 16K 8LOCK
209 OF STORGAGE.
210 ;ENTRY REQUIREMEtHS:
211 ES = ADDPESS OF STORAGE SEGt!EHT eEING TESTED
21Z OS = ADDRESS OF STORAGE SEGMENT BEING TESTED
Z13 \oIHEH EHlERltIG AT STGTST_CHT. CX MUST BE LOADED WITH THE BYTE COUNT.
Z14 .EXIT PARAtlETERS:
ZIS ZERO HAG = <l If STORAGE ERROR (DATA COMPARE OR PARITY CHECK. AL::O
216 DENOTES A PARITY CHECK. ELSE AL=XOR' EO 8IT PATTERN OF THE
217 EXPECTED DATA PATTERt~ VS THE ACTUAL DATA READ.
216 Ax.eX,CX.DX,DI, Atm 51 ARE ALL DESTROYED.
Zl'jl i --------------------------------------------
EOIA
2Z0
STGTST
PROC NEAR
E01A 890040
tlOV CX.4000H iSETUP tNT TO TEST A 16K BlK
E010 STGTST_Ctn:
'"
'"
EOID Fe 223 ClO ;SET 011'1 FLAG TO ItICREMENT
EOlE 8809
2'4
f10V
BX.CX
,SAVE BYT!: tNT (4K fOR VIOEO OR 16K I
E020 B8FfFF
HOV AX.OFFFFH
;6ET DATA PATTERN TO URITE
E023 BA55AA 226 HOV
OX.OAA55H
;SETUP OTHER DATA PATTERNS TO USE
E026 2BFF
"7
SUB
OI.OI
iDI = OffSET 0 PELAlIVE TO ES REG
EOZ8 F3
228
PEP
STOSE\
;WRITE STORAGE LOCATIONS
E029 AA
'25
A-4

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5