diff options
Diffstat (limited to 'roms/7seg_counter_irq_timer_smart_update.asm')
| -rw-r--r-- | roms/7seg_counter_irq_timer_smart_update.asm | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/roms/7seg_counter_irq_timer_smart_update.asm b/roms/7seg_counter_irq_timer_smart_update.asm index 2b009de..e18bfc7 100644 --- a/roms/7seg_counter_irq_timer_smart_update.asm +++ b/roms/7seg_counter_irq_timer_smart_update.asm @@ -4,8 +4,8 @@ T1LCL = $6004 T1LCH = $6005 ACR = $600b PCR = $600c +IFR = $600d IER = $600e -IFR = $600f SER = %00000001 RCLK = %00000010 @@ -106,8 +106,10 @@ nmi: irq: pha - phx - phy + txa + pha + tya + pha bit T1LCL ; clear timer1 interrupt bit PORTA ; clear CA1 interrupt dec TICKS @@ -115,9 +117,11 @@ irq: lda #INTERVAL sta TICKS inc CURRENT ; increment internal counter -irq_done: - ply - plx +irq_done: + pla + tay + pla + tax pla cli rti |