Sha256: 98a983f244ee1a42ec6a8a48b6a12a3989d81d73d4f2dff1bcdea98420a3f773
Contents?: true
Size: 1.46 KB
Versions: 7
Compression:
Stored size: 1.46 KB
Contents
; Hello World for Philips Videopac (Magnavox Odyssey 2) ; by Frog ( https://github.com/petersobolev ) ; 25 July 2016 cpu 8048 org 400h ; interrupt vectors jmp 02C3h ; selectgame (RESET) jmp 0009h ; irq jmp timer ; timer jmp 001Ah ; vsyncirq jmp start ; after selectgame jmp 0044h ; soundirq timer: ret ; no timer needed start: call 011Ch ; gfxoff mov r0,#010h ; pointer in VDC - which char to display (one of 12) mov r3,#40 ; x mov r4,#100 ; y mov r1,#hellostr & 0ffh ; string to print (should be on same 255 bytes page) mov r2,#11 ; string length nextchar: mov a,r1 movp a,@a ; get char located at @r1 mov r5,a inc r1 ; inc addr of char mov r6,#0eh ; white color call 03EAh ; printchar bios subroutine (increases r0, r3) djnz r2,nextchar call 0127h ; gfxon (show what is written to VDC) loop: jmp loop ; just wait and do nothing ; 'HELLO WORLD' (ascii not supported by assembler) hellostr: db 01dh, 012h, 00eh, 00eh, 017h, 00ch, 011h, 017h, 013h, 00eh, 01ah
Version data entries
7 entries across 7 versions & 1 rubygems