IBM 5150 Technical Reference page 129

LaC OBJ LINE SOURCE
439 OKA
CHA~ElS
ADDRESS AND COUNT REGISTERS
J-----
WRAP
£10A BOFF
EIOC
EIOC 8A08
ElOE SAF8
E110 890800
£1132.8Oz.
EllS
EllS EE
E 116 50
E1l7 EE
E118 B80101
EHB EC
Elle 8AEO
EllE EC
EllF 3808
El2.1 7401
flU F4
£124
£124 42
E125 f2EE
Ell7 FEeD
E129 74£1
E12B 8EDB
E120 8EC3
E12F BOFF
E131 E601
El33 50
£134 E601
£136 B20B
E138 B056
En... EE
E138 8000
E13D £608
E13F 50
E140 E60A
£142 8103
El44 B041
£146
E146 EE
f147 FEeD
E149 E2FB
E14B BAl30Z.
E14E B001
E150 EE
£151 882£7204
£155 81fD3412
£159 740...
Else 8C41F090
E15F E9B6FE
E162
£162 7401
£164 F4
£165
£165 2BFF
£167 £460
£169 l40C
E168 0404
E160 BlOC
440
441
HOY
AL.OFFH
; WRITE PATTERN FF TO All REGS
442
C16:
443
HOY
I SAVE PATTERN FDR COMPARE
444
HOY
445 HOY ; SETUP LOOP tNT
446 SU8
; SETUP I/O PORT AOOR OF REG {OOOO,
447
C17:
448 OUT DX,Al I WRITE PATTERN TO REG, LSB
449
PUSH AX
4SO
OUT DX,AL
I HSB OF 16 BIT REG
451
HOV AX,0101H
I AX TO ANOTHER PAT BEFORE RO
452
IN AL,DX I READ 16-BIT OMA CH REG. LSB
453
HOV
AH,AL
I SAVE LSB OF 16-BIT REG
454
IN AL.DX I READ MSB OF OMA CH REG
45. CHP
BX,AX I PATTERN READ AS WRITTEN?
456 JE C18 I YES - CHECK NEXT REG
457
HLT I NO - HALT THE SYSTEH
458 C18:
I NXT_DMA_tH
4.9
INC
ox
I SET 110 PQRT TO NEXT CH REG
460
lOOP C17 ; WRITE PATTERN TO NEXT REG
461
INC AL
j
SET PATTERN TO
0
462
JZ C16 I WRITE TO
CH~El
REGS
"3
464 1----- INITIALIZE AND START OMA FOR MEMORY REFRESH.
"7
46.
..6
HOY
DS.BX ; SET
UP
ABSO INTO OS AN) ES
HOY
ES,BX
468
ASSUME DS:ABSO.ES:ABSO
469
47.
t10V AL,OFFH
; SET CNT OF 64K FOR RAtI REFRESH
471 OlTT
OI1A+l,AL
472
PUSH AX
473
OUT OI1A+l,.U
474
HOV DL.OSH I
OX=OOOB
47.
HOV Al,OS8H
I SET OMA HOOE.CH O.REAO,AUTOINT
47.
OUT DX,Al
I
WRITE
DHA
HOOE REG
477
HOV AL,O ; ENABLE DHA CONTROllER
478
OUT DI1.6.+8.AL I
S~TUP
OMA COHHAHD REG
479
PUSH AX
480
OUT
DHA+ID,Al
I
ENABLE CHANNEl
0
FOR REFRESH
481 HOY
482
HOY
I SET HOOE FOR CHAHNEl 1
48'
t18A:
484
OUT
aX,AL
48. INC
AL I POINT TO NEXT CHAHNEl
486 lOOP C18A
487 1---------- - - - - - - - - ------ - - - - - - - - - -- - ---- -- ----- -- -- -- ----------­
488 BASE 16K READIWRITE
STOR.6.GE TEST
489 I DESCRIPTION
490
~ITEIREADIVERIFY
DATA PATTERNS FF,55,AA,01, AND 00
491 TO 1ST 16K OF STORAGE. VERIFY STORAGE ADORESSABILITY.
492 INITIALIZE THE 8259 INTERRUPT CONTROllER CHIP
FOR
493 CHECKING MANUFACTURING TEST 2 HODE.
494
J - . -- - - -. --- _. -- -. - - - -- -- _ •••• ----- - --_. - --------- --------------­
49.
496
1-----
DETERMINE MEMORY SIZE
AN)
FIll MEMORY
WITlf
DATA
4"
498
HOY DX,021lH 1 ENABLE EXPANSION BOX
499
HOY
AL,OlH
500 OUT
DX,AL
.01 HOV
BP,OATA_WORDrOFFSET RESET_FLAG! I SAVE 'RESET.FlAG' IN SP
S02
CHP BP,1234H ; WARM START?
503
JE C18B
; BYPASS STG 1ST.
S04 HOY
SP,OFFSET C2
S05
J"P
STGTST
C24:
S07
JE C188 I PROCEED IF STGTST OK
S08
HLT
; HALT IF NOT
509
CISB:
510 SUB DI,DI
511 IN
I DETERMINE BASE RAtI SIZE
512 AM>
AL,OCH
I
ISOLATE RAM SIZE
SWS
.06
ADD
AL. 4 I CALCULATE HEttoRY SIZE
514
HOY
CL. 12
'13
5-36 System BIOS