4cade/src/demo/firebird.a

;license:MIT
;(c) 2022 by qkumba

!cpu 6502
!to "build/DEMO/FIREBIRD#060300",plain
*=$300

         !source "src/constants.a"   ; no code in these
         !source "src/macros.a"

         +ENABLE_ACCEL_LC
         +LOAD_XSINGLE title

         lda   #$60
         sta   $3361
         jsr   $3300      ; decompress
         lda   #$D0
         sta   $277C
         sta   $278F
         sta   $2795
         sta   $3156
         sta   $315E
         sta   $8C35
         sta   $8EDE
         sta   $8CBD
         sta   $8C7B
         sta   $8C9D

         ldx   #3-1
-        lda   patch,x
         sta   $3170,x
         sta   $A370,x
         sta   $7E48,x
         sta   $18A5,x
         sta   $198D,x
         dex
         bpl   -

         lda   #1
         sta   $7B2A
         lda   #$30
         sta   $A367
         lda   #7
         sta   $A368
         lda   #$EA
         sta   $A369
         sta   $A36A

         +DISABLE_ACCEL

         jmp   $30A0

patch    !byte $4C,$00,$01

title    !byte x_e-x_b
x_b      !text "FIREBIRD"
x_e

!if * > $3F0 {
  !error "code is too large, ends at ", *
}