2 ; IRQ handling (ATARI version)
5 .export initirq, doneirq
10 .import __CHARGEN_START__
11 .include "romswitch.inc"
14 ; ------------------------------------------------------------------------
29 ; ------------------------------------------------------------------------
40 ; ------------------------------------------------------------------------
54 sta PORTB ; disable ROM
55 set_chbase >__CHARGEN_START__
57 jsr callirq ; Call the functions
60 sta PORTB ; restore old ROM setting
67 jmp IRQInd ; Jump to the saved IRQ vector
69 ; ------------------------------------------------------------------------