4cade/src/demo/agent.u.s.a.a

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;license:MIT
;(c) 2021 by Frank M.
!cpu 6502
!to "res/DEMO/AGENT.U.S.A",plain
*=$300
!source "src/constants.a" ; no code in these
!source "src/macros.a"
+READ_RAM2_WRITE_RAM2
jsr EnableAccelerator
+LOAD_FILE_AT title, $00
+READ_ROM_NO_WRITE
lda #$60
sta $36D3
jsr $366D ; decompress
ldx #5
- lda $100,x
sta reset,x
dex
bpl -
sec
rol $3F3 ; point to $300 instead
jsr $FB6F ; reset vector checksum (bank ROM in)
lda #$EA
sta $15DD
sta $15DD+1
sta $15DD+2 ; disable button press on main menu
lda #$4C
sta $0A06
sta $1605
lda #0
sta $0A06+1
sta $1605+1
lda #1
sta $0A06+2
sta $1605+2 ; set exits
lda #$D0
sta $AC64 ; disable sound
+DISABLE_ACCEL
jmp $837
reset !byte $00,$00,$00,$00,$00,$00
title !byte x_e-x_b
x_b !text "X/AGENT.U.S.A/AGENT.U.S.A"
x_e
!if * > $3F0 {
!error "code is too large, ends at ", *
}