ICP Electronics WAFER-7850, Manual

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Example program:
; INITIAL TIMER PERIOD COUNTER
;
W_LOOP:
MOV AX, 6F02H ;setting the time-out value
MOV BL, 30 ;time-out value is 48 seconds
INT 15H
;
;
ADD YOUR APPLICATION PROGRAM HERE
;
CMP EXIT_AP, 1 ;is your application over?
JNE W_LOOP ;No, restart your application
MOV AX, 6F02H ;disable Watchdog Timer
MOV BL, 0 ;
INT 15H
;
;
EXIT
;
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Appendix B. Address Mapping
IO Address Map
I/O address Range Description
000-01F DMA Controller #1
020-021 Interrupt Controller #1, Master
040-05F 8254 timer
060-06F 8042 (Keyboard Controller)
070-07F Real time Clock, NMI Mask
080-09F DMA Page Register
0A0-0BF Interrupt Controller #2
0C0-0DF DMA Controller #2
0F0 Clear Math Coprocessor Busy
0F1 Reset Math Coprocessor
0F2 Core logic programming configuration
0F8-0FF Math Coprocessor
1F0-1F8 Fixed Disk
200-207 Game I/O
278-27F Parallel Printer Port 2 (LPT3)
2E8-2EF Serial Port 4
2F8-2FF Serial Port 2
300-31F Prototype Card
360-36F Reserved
378-37F
Parallel Printer Port 1 (LPT2)
3B0-3BF Monochrome Display and Printer Adapter
(LPT1)
3C0-3CF Reserved
3D0-3DF Color/Graphics
Monitor Adapter
3E8-3EF Serial Port 3
3F0-3F7 Diskette Controller
3F8-3FF Serial Port 1