4cade/src/prelaunch/head.on.a

32 lines
740 B
Plaintext
Executable File

;license:MIT
;(c) 2019 by Frank M.
!cpu 6502
!to "build/PRELAUNCH.INDEXED/HEAD.ON",plain
*=$106
!source "src/prelaunch/common.a"
; clobbers $100, sets LC & page 3 reset vectors
+NEW_RESET_VECTOR $7000
lda #$4C
sta $7003 ; JMP not (JMP)
lda $104
sta $7004
lda $105 ; clone actual TR reentry point to $7000
sta $7005 ; loops between LC and $7000 otherwise
+READ_RAM2_WRITE_RAM2
lda #0
sta $FFFC
lda #$70
sta $FFFD ; LC reset vector fix to $7000
+READ_ROM_NO_WRITE
jmp $2000
!if * > $1C0 {
!error "code is too large, ends at ", *
}