IBM AT 5170 Technical Reference page 235

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IBM Personal Computer MACRO Assenlbler Version 2.00
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-.
TEST2 ---- 06/10/85 POST TESTS AND INITIALIZATION ROUTINES 06-10-85
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E
R
POP ex RECOVER 64K BLOCK COUNT
OEe ex
DECREMENT BLOCK COUNT FOR LOOP
.JCXZ KB_LOOP3
CONT I NUE TO NEXT TEST I F DONE
PUSH
CX
SAVE LOOP COUNT
JMP LOOP TI LL ALL MEMORY CHECKED
E2'
KB_LOOP3: END MA IN TEST LOOP
POP AX
CLEAR MAX I MUM BLOCK COUNT
POP AX
CLEAR BASE SIZE COUNT FROM STACK
ADDRESS TEST VALUES ARE IN STACK
ADORES S L I "IE 16-23 TEST
LET FIRST PASS BE SEEN
MOV
CALL
CX,I6511
WAITF
COUNT FOR 250 MS FIXED TIME DELAY
ALLOW S
I
X D I SPLAY REFRE SH CYCLES
;---- ­ INITIALIZE OS DESCRIPTOR
00
0000
PUSH
POP
MOV
MOV
BYTE PTR GOT PTR
ES -
BYTE PTR ES: (OS TEMP.8ASE HI BYTE) ,0
ES;OS_TEMP.SASE::::LO_WORO,O- ­
;----­ TEMPORARY SEGMENT SAVE IN DMA PAGE REGISTER
5U8
OUT
OUT
MOV
OUT
AL,AL
DMA PAGE+4.AL
oMA-PAGE+5,AL
AL,OIH
OMA_PAGE+3,AL
HIGH 8YTE OF LOW WORD OF SEGMENT
LOW 8YTE OF LOW WORD OF SEGMENT
SET HIGH BYTE OF SEGMENT WORD
HIGH BYTE OF SEGMENT
;----­ POINT TO NEXT BLOCK OF 64K
01
MOV
OUT
ADD
AL,l3H ; <><><><><><><><><><><><>
MFG PORT ,AL ;
<><>
CHECKPOINT 33
<><>
BYTE" PTR ES: lDS_TEMP.8ASE_HI_BYTEI ,01
;---- ­ CHECK FOR END OF BASE NENORY TO 8E TESTED
OA
CMP
..JA
8YTE PTR ESIIDS TEMP.BASE HI BYTEI,OAH
NEXT_A - ;-CONTINUE IF ABOVE I MEG
POP
POP
POP
PUSH
PUSH
PUSH
CMP
..JB
CX ; GET COUNT
BX ; GET COUNT TESTED
AX ; RECOVER COUNT OF BASE MEMORY 8LOCKS
AX ; SAVE BASE COUNT
BX ; SAVE TESTED COUNT
CX ; SAVE TOTAL COUNT
BYTE PTR ESI (OS TEMP.BASE HI BYTE) ,AL ; MAX BASE COUNT
NEXT_A - ;-CORTINUE IF NOT DONE WITH BASE MEMORY
DO ADD 1T IONAL STORAGE ABOVE I MEG
NEXT A2:
10
- MOV
BYTE PTR ES: (DS_TEMP.BASE_HI_BYTEl ,tOH
NEXT_A:
MOV AL,BYTE PTR ES: /OS_TEMP.BASE_HI_BYTE)
; ----- DMA PAGE REG I STERS 3
I SAVE THE HIGH 8YTE OF SEGMENT
OUT ; FOR POSSIBLE ERROR
;----- CHECK FOR TOP OF MEMORY (FEOOOO) 16 MEG
CMP AL,OFEH ; TOP OF MEMORY?
JZ K8_LOOP_3 ; GO NEXT TEST IF' IT IS
;----- SET OS REGISTER
PUSH BYTE PTR OS TEMP
POP
as ­
SUB Dl,OI ; POINT TO START OF BLOCK
MOV
DX.DS:
[or
1
; GET THE VALUE OF THIS BLOCK
MOV SI,DJ ; SET S I FOR POSS I BLE ERROR
SUB AX.AX ; CLEAR MEMORY LOCATION
MOV
lol},AX
ALLOW 01 SPLAY TIME TO D I SPLAY MESSAGE AND REFRESH TO RUN
MOV CX,6761 COUNT FOR 102 loiS FIXED TIME DELAY
CALL WAITF ALLOW FI VE D I SPLA Y REFRESH CYCLES
POP CX GET THE LOOP COUNT
POP AX RECOVER TESTED MEMORY
PUSH AX SAVE TESTED MEMORY
PUSH
CX
SA VE LOOP COUNT
CMP AX,DX DOES THE BLOCK 10 MATCH
MOV AX,OX GET THE BLOCK 10 FOR POSS I BLE ERROR
JNZ E21 A GO PR I NT ERROR
.
-----
CHECK FOR CHECK PAR I TV
'N
AL,PORT B CHECK FOR 1/0 OR PARITY CHECK
ANa
AL,PARlfY_ERR STRIP UNWANTED BITS
JNZ E21A EXIT IF PARITY ERROR
POP CX POP CX TO GET AX
POP AX
RECOVER TESTED MEMORY
ADO AX,64 .4K I NCRENENTS
PUSH AX SAVE TESTED MEMORY
PUSH CX SAVE LOOP COUNT
CALL PRT_OK DISPLAY OK MESSAGE
POP CX RECOVER 64K BLOCK COUNT
OEC CX LOOP TILL ALL MEMORY CHECKED
..Jcxz
KB_LOOP _3
CONT INUE
PUSH ex SAVE LOOP COUNT
JMP
E2'
A CONTINUE TILL DONE
1----- BACK TO REAL MODE - MEMORY TESTS DONE
KB LOOP 3:
- -MOV
AL,34H <><><> <><><> <><> <><><><>
OUT MFG_PORT, AL
<><>
CHECKPO I NT 34
<><>
TEST2
5-63