; Test program to verify correct emu8051 operation ; ; Test desc: timers ; Test output: PC = $FFF0 ; Test output: SP = $60 ; Test output: R0 = $22 ; Test output: R1 = $97 ; Test output: R2 = $20 ; Test output: R3 = $42 ; Test output: TIMER0 = $10DA ; Test output: TIMER1 = $1F42 ; Test output: TCON = $A0 ; Test output: TMOD = $11 ; Test output: PSW = $00 TOS EQU 60h ; Adresse du dessus de la pile. ORG 0000h ; Reset vector MOV SP,#TOS ; Init stack pointer MOV TMOD,#00010001B ; Init timers 0 and 1 as 16-bit timers, ; incremented by the internal clock ;; First test: no overflow MOV TH0,#2 MOV TL0,#55h ; Set initial value of timer0 to $0255 CALL DELAY MOV 00h, TH0 ; Save value of timer 0 MOV 01h, TL0 MOV 02h, TH1 ; Save value of timer 1 MOV 03h, TL1 MOV 04h, TCON ;; Second test: overflow MOV TH0,#0F0h MOV TL0,#98h ; Set initial value of timer0 to $F098 MOV Th1,#0FFh MOV TL1,#00h ; Set initial value of timer1 to $FF00 CALL DELAY LJMP 0FFF0h ;; Loop of $2040 cycles DELAY: MOV A,#10h ORL TCON,#50h ; Timer 0 and timer 1 ON. B2: MOV B,#0 B1: DJNZ B,B1 DJNZ ACC,B2 ANL TCON,#0AFh ; Stop both timers RET END