6502
/
kickc
mirror of https://gitlab.com/camelot/kickc.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Added more CIA constants

This commit is contained in:
Jesper Gravgaard 2023-12-29 07:13:36 +01:00
parent 9e2d1accc5
commit ef7ab9be16
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/main/kc/include/mos6526.h
View File

@ -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)