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

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 0" Cll • RETURN ADDRESS
E016 EDEI '06 C' 0" C"
i PETlmtl ADDRESS FOR DUMMY STACK
207 ; ----------------------- ---------------- - ---­
lOS
209 OF STORGAGE.
THIS SUBROUTINE PERFORMS A READ/WRITE STOOAGE TEST ON A 16K 8LOCK
210 ;ENTRY REQUIREMEtHS:
211 ES = ADDPESS OF STORAGE SEGt!EHT eEING TESTED
21Z
Z13
OS = ADDRESS OF STORAGE SEGMENT BEING TESTED
\oIHEH EHlERltIG AT STGTST_CHT. CX MUST BE LOADED WITH THE BYTE COUNT.
Z14 .EXIT PARAtlETERS:
ZIS ZERO HAG =