; ****************************************************************************** ; Binary to Seven-Segment display routine ; Author:Zafar Ullah ; Written: 98/7/30 ; ;****************************************************************************** ; ;****** Assembler directives ; ; uses: SX28AC, 2 pages of program memory, 8 banks of RAM, high speed osc. ; operating in turbo mode, with 8-level stack & extended option reg. ; DEVICE pins28,pages2,banks8,oschs DEVICE turbo,stackx,optionx ID 'Seven-Se' ;program ID label RESET reset_entry ;set reset/boot address FREQ 50000000 ; ; ; ; ORG 100h ; ; Program execution begins here on power-up or after a reset ; reset_entry MOV M, #$0F ;set the mode registar. MOV !RB, #$FF ; Set Port B as Input MOV !RC, #$00 ; Set the port C as Output :LOOP MOV W, RB ; Read Port B AND W, #$0F ; Masking significant bits CALL CHECK_TABLE ; Go to look up table MOV RC, W ; Output the value to port C NOP NOP JMP :LOOP ORG 10h CHECK_TABLE JMP PC+W ; Look up table RETW $40,$F9,$24,$30,$19,$12,$02,$78,$00,$18,$08,$03,$46,$21,$06,$0E
file: /Techref/scenix/seven_seg.src, 1KB, , updated: 1999/6/14 10:19, local time: 2024/12/2 11:19,
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