IBM XT 5160 User Manual

SOFTWARE INTERRUPTS (BIOS CALLS AND PO INTERS )
;
THESE ARE THE VECTORS WH I CH ARE MOVED INTO
; THE 8086 I NTERRUPT AREA OUR I NG POWER ON.
; ONLY THE OFFSETS ARE 0 I SPLA YEO HERE, CODE
;
SEGMENT WILL BE ADDED FOR ALL OF THEM, EXCEPT
; WHERE NOTED.
.----------------------------------------- ------------- --
TEMPORARY INTERRUPT SERV I CE ROUT I NE
1. TH I S ROUT I NE I S ALSO LEFT I N PLACE AFTER THE
;
POWER ON 0 I AGNOST I CS TO SERV I CE UNUSED
I NTERRUPT VECTOR
S. LOCATION 'I NTR FLAG' WILL
CONTA I N EITHER: 1. LEVEL OF HARDWARE I NT. THAT
CAUSED CODE TO BE EXEC.
; 2. 'FF' FOR NON-HARDWARE INTERUPTS THAT WAS
EXECUTED ACC I DENTL Y •
5-107
INT 10H -- VIDEO DISPLAY
I NT 1 1H - - GET EQU I PMENT FLAG WORD
I NT 12H -- GET REAL MODE MEMORY SIZE
I NT 1 3H - - 0 I SKETTE
I NT 1 4H - - COMMUN I CAT I ON ADAPTER
INT 15H -- EXPANDED BIOS FUNCTION CALL
I NT I 6H - - KEYBOARD INPUT
I NT 17H - - PR I NTER OUTPUT
INT 18H -- OF600H INSERTED FOR BASIC
INT 19H -- BOOT FROM SYSTEM MEDIA
INT 1 AH -- TIME OF DAY
I NT lBH -- KEYBOARD BREAK ADDRESS
I
NT 1CH - - TI MER BREAK ADORES S
INT IDH -- VIDEO PARAMETERS
I NT 1EH -- 0 I SKETTE PARAMETERS
INT IFH -- POINTER TO VIDEO EXTENSION
GET MASK VALUE
MASK OFF L VL BE I NG SERV I CEO
SAVE REG
AX CONTENTS
READ I
N-SERV I CE REG
(FIND OUT WHAT LEVEL BEING
SERVICED)
GET LEVEL
SAVE IT
OO? (NO HARDWARE ISR ACTIVE)
VECTOR TABLE VALUES FOR POST TESTS
I NT 08H - HARDWARE T I MER 0 IRQ
I NT 09H - KEYBOARD IRQ
INT OAH IRQ
INT OBH - IRQ
INT OCH - IRQ
INT ODH - IRQ
I NT OEH - 0 I SKETTE IRQ
INT OFH - IRQ
SET FLAG
RESTORE REG AX CONTENTS
; NEED I
RET FOR VECTOR TABLE
; SET FLAG TO FF IF NON-HDWARE
1-24
01-10-86
AL, INTAO 1
AL,AH
INTA01,AL
AL,EOI
I NTAOO, AL
tllNTR FLAG,AH
AX -
OS
AL,INTAOO
AH,AL
AL,AH
HW INT
AH-;OFFH
SHORT SET_I NTR_FLAG
OFFSET V IDEO 10
OFFSET EQU I PMENT
OFFSET MEMORY SIZE DET
OFFSET 0 I SKETTE 10-
OFFSET RS232 10-
OFFSET CASSETTE 10
OFFSET KEYBOARD-I 0
OFFSET PR I NTER To
OOOOOH -
OFFSET BOOT STRAP
OFFSET T I ME-OF DAY
OFFSET DUMMY RETURN
OFFSET DUMMY-RETURN
OFFSET V IDEO-PARMS
OFFSET 0 I SK BASE
OOOOOH -
TIME_OF _DAY_'I
OFEA5H
01 EA5H
T I MER_I NT_I
CS:CODE
OFEF3H
o IEF3H
LABEL WORD
OFFSET T I MER I NT
OFFSET KB I NT
OFFSET DTI
OFFSET 011
OFFSET 011
OFFSET 011
OFFSET 0 I SK I NT
OFFSET 011-
CS:CODE,DS:DATA
OFE6EH
o IE6EH
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
OW
INPUT
(AH) = 0
READ THE CURRENT CLOCK SETT I NG
RETURNS CX = HIGH PORTI ON OF COUNT
OX = LOW PORT I ON OF COUNT
AL = 0 1FT I MER HAS NOT PASSED
24 HOURS SINCE LAST READ
<> 0 I F ON ANOTHER DA Y
(
AH) = 1 SET THE CURRENT CLOCK
CX = HIGH PORT I ON OF COUNT
OX = LOW PORT I ON OF COUNT
NOTE: COUNTS OCCUR AT THE RATE OF
1193180/65536 COUNTS/SEC
(OR ABOUT I 8.2 PER SECOND - - SEE EQUATES BELOW)
ORG OFF53H
ORG 01 F53H
IRET
DUMMY RETURN FOR ADORES S CaMPA TlBI L I TY
POST (01/10/86)
IN
OR
OUT
MOV
OUT
SET_I NTR FLAG:
MOV
POP
POP
DUMMY RETURN:
- IRET
01 I ENDP
.---------------------- ----------------------------------
01 1 PROC NEAR
ASSUME OS :DATA
PUSH OS
CALL DDS
PUSH AX
MOV AL,OBH
OUT I NTAOO, AL
NOP
IN
MOV
OR
JNZ
MOV
JMP
ASSUME
ORG
ORG
VECTOR TABLE
- OW
OW
OW
OW
OW
OW
OW
OW
ORG
ORG
TIMER_I NT:
JMP
ASSUME
ORG
ORG
TIME OF DAY:
- -JMP
PAGE
;
--- I NT I A - ----- -- - -------------------------- ----------
TIME OF DAY :
THIS ROUTINE ALLOWS THE CLOCK TO BE SET/READ :
:
:
:
:
:
:
:
:
:
:
:
:
:
:
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
I E6E
2567 I E6E
2568 I E6E E9 0995 R
2569
2570
2571 I EA5
2572 IEA5
2573 1 EA5 E9
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
I EF3
2585 1 EF3
2586 I EF3 1 EA5 R
2587 IEF5 0987 R
2588 I EF7 1 F23 R
2589 I EF9 I F23 R
2590 I EFB 1 F23 R
2591 I EFD I F23 R
2592 I EFF OF57 R
2593 1FO 1 I F23 R
2594
2595
2596
2597 1 F03 1065 R
2598 1 F05 1840 R
2599 lF07 1841 R
2600 1 F09 OC59 R
2601 1 FOB 0739 R
2602 1FOD 1859 R
2603 1 FOF 082E R
2604 lFll OFD2 R
2605 lF13 0000
2606 1F 15 06F2 R
2607 lF17 lE6E R
2608 lF19 lF49 R
2609 lF1B lF49 R
2610 lF1D 10A4 R
261 1 1F 1F OFC7 R
2612 lF21 0000
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624 I F23
2625
2626 I F23 IE
2627 IF24 E8 lA12 R
2628 I F27 50
2629 I F28 BO OB
2630 I F2A E6 20
2631 I F2C 90
2632 1 F2D E4 20
2633 I F2F 8A EO
2634 I F3l OA C4
2635 I F33 75 04
2636 I F35 B4 FF
2637 I F37 EB OA
2638 I F39
2639 1 F39 E4 21
2640 I F3B OA C4
2641 1 F3D E6 21
2642 1 F3F BO 20
2643 IF41 E6 20
2644 lF43
2645 1 F43 88 26 006B R
2646 IF47 58
2647 IF48 IF
2648 lF49
2649 IF49 CF
2650 1 F4A
2651
2652
2653
2654
2655
2656
1 F53
2657 lF53 CF
IBM Personal Computer MACRO Assembler Version 2.00
POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES

IBM XT 5160 Specifications

General

Brand	IBM
Model	XT 5160
Category	Desktop
Language	English