From ef7ab9be16836486f5185341652c37a10099a659 Mon Sep 17 00:00:00 2001 From: Jesper Gravgaard Date: Fri, 29 Dec 2023 07:13:36 +0100 Subject: [PATCH] Added more CIA constants --- src/main/kc/include/mos6526.h | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/src/main/kc/include/mos6526.h b/src/main/kc/include/mos6526.h index 821cc8319..8e2b79116 100644 --- a/src/main/kc/include/mos6526.h +++ b/src/main/kc/include/mos6526.h @@ -37,7 +37,21 @@ struct MOS6526_CIA { }; /// Value that disables all CIA interrupts when stored to the CIA Interrupt registers -const char CIA_INTERRUPT_CLEAR = $7f; +const char CIA_INTERRUPT_CLEAR_ALL = $7f; +/// CIA Interrupt: Mask for clearing CIA interrupt flags. +const char CIA_INTERRUPT_CLEAR = 0x00; +/// CIA Interrupt: Mask for setting CIA interrupt flags. +const char CIA_INTERRUPT_SET = 0x80; +/// CIA Interrupt: Mask modifying Timer A interrupt. Must be combined the SET/CLEAR. +const char CIA_INTERRUPT_TIMERA = 0x01; +/// CIA Interrupt: Mask modifying Timer B interrupt. Must be combined the SET/CLEAR. +const char CIA_INTERRUPT_TIMERB = 0x02; +/// CIA Interrupt: Mask modifying TOD alarm interrupt. Must be combined the SET/CLEAR. +const char CIA_INTERRUPT_ALARM = 0x04; +/// CIA Interrupt: Mask modifying Serial Data Register Full/Empty interrupt. Must be combined the SET/CLEAR. +const char CIA_INTERRUPT_SP = 0x08; +/// CIA Interrupt: Mask modifying FLAG pin interrupt. Must be combined the SET/CLEAR. +const char CIA_INTERRUPT_FLAG = 0x10; /// Timer Control - Start/stop timer (0:stop, 1: start) const char CIA_TIMER_CONTROL_STOP = 0b00000000; @@ -47,6 +61,8 @@ const char CIA_TIMER_CONTROL_START = 0b00000001; const char CIA_TIMER_CONTROL_CONTINUOUS = 0b00000000; /// Timer Control - Time CONTINUOUS/ONE-SHOT (0:CONTINUOUS, 1: ONE-SHOT) const char CIA_TIMER_CONTROL_ONESHOT = 0b00001000; +/// Timer Control - FORCE LOAD (this is a STROBE input) (1: FORCE LOAD) +const char CIA_TIMER_CONTROL_FORCELOAD = 0b00010000; /// Timer A Control - Timer counts (0:system cycles, 1: CNT pulses) const char CIA_TIMER_CONTROL_A_COUNT_CYCLES = 0b00000000; /// Timer A Control - Timer counts (0:system cycles, 1: CNT pulses)