2 ; IRQ handling (ATARI version)
5 .export initirq, doneirq
10 .import __CHARGEN_START__
11 .include "romswitch.inc"
14 ; ------------------------------------------------------------------------
29 ; ------------------------------------------------------------------------
40 ; ------------------------------------------------------------------------
55 sta PORTB ; disable ROM
56 set_chbase >__CHARGEN_START__
58 jsr callirq ; Call the functions
61 sta PORTB ; restore old ROM setting
69 jmp IRQInd ; Jump to the saved IRQ vector
71 ; ------------------------------------------------------------------------