adapted to Kick Assembler, some documentation update

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FeralChild64 committed 2019-09-07 12:35:21 +02:00
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; Resources describing the C64 reset sequence:
; https://www.c64-wiki.com/wiki/Reset_(Process)
// Resources describing the C64 reset sequence:
// https://www.c64-wiki.com/wiki/Reset_(Process)
reset_entry:
; The GPL program at https://github.com/Klaus2m5/6502_65C02_functional_tests/blob/master/6502_functional_test.a65
; uses the following initial reset sequence
; affirmed by c64 PRG p269
// The GPL program at https://github.com/Klaus2m5/6502_65C02_functional_tests/blob/master/6502_functional_test.a65
// uses the following initial reset sequence
// affirmed by c64 PRG p269
cld
ldx #$ff
txs
sei
; The following routine is based on reading the public KERNAL jumptable routine
; list, and making unimaginative assumptions about what should be done on reset.
; Also, https://codebase64.org/doku.php?id=base:assembling_your_own_cart_rom_image was used
; as it shows example startup sequence, to be followe by cartridge creators
// The following routine is based on reading the public KERNAL jumptable routine
// list, and making unimaginative assumptions about what should be done on reset.
// Also, https://codebase64.org/doku.php?id=base:assembling_your_own_cart_rom_image was used
// as it shows example startup sequence, to be followe by cartridge creators
; C64 PRG p269
// C64 PRG p269
jsr cartridge_check
bcc +
bcc !+
jmp (ICART_COLD_START)
*
; Initialising IO is obviously required. Also indicated by c64 prg p269.
!:
// Initialising IO is obviously required. Also indicated by c64 prg p269.
jsr JIOINIT
; Setting up the screen and testing ram is obviously required
; also affirmed by p269 of c64 prg
jsr JRAMTAS ; called RANTAM on Codebase64 wiki
// Setting up the screen and testing ram is obviously required
// also affirmed by p269 of c64 prg
jsr JRAMTAS // called RANTAM on Codebase64 wiki
; Resetting IO vectors is obviously required, if we want interrupts to run
; also affirmed by c64 prg p269
// Resetting IO vectors is obviously required, if we want interrupts to run
// also affirmed by c64 prg p269
jsr JRESTOR
;; "Compute's Mapping the 64" p236
// "Compute's Mapping the 64" p236
jsr JCINT
; What do we do when finished? A C64 jumps into the BASIC ROM
cli ; Allow interrupts to happen
// What do we do when finished? A C64 jumps into the BASIC ROM
cli // Allow interrupts to happen
; c64 prg p269
// c64 prg p269
jmp (IBASIC_COLD_START)