Dual bus processor

[fpgaboy.git] / rom.asm

diff --git a/rom.asm b/rom.asm
deleted file mode 100644 (file)
index 640c2b075bbef77b911785ad8a678c6385c255f8..0000000000000000000000000000000000000000
--- a/rom.asm
+++ /dev/null
@@ -1,139 +0,0 @@
-       SECTION "a",HOME
-main:
-       ld c, $51
-       ld a, $FF
-       ld [c],a
-       ld sp,$DFFF
-
-       ld hl,text
-       call puts
-       
-       call memtest
-       call waitsw
-       jp main
-
-text:
-       db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
-
-memtest:
-       ld hl,memteststr
-       call puts
-       
-       ld hl, $C000
-.wr:
-       ld a,h
-       xor l
-       ld [hli],a
-       ld a, $DF
-       cp h
-       jp nz, .wr
-       ld a, $80
-       cp l
-       jp nz, .wr
-
-       ld hl, $C000
-.rd:
-       ld a,h
-       xor l
-       ld b,a
-       ld a, [hli]
-       cp b
-       jp nz, .memfail
-       
-       ld a, $DF
-       cp h
-       jp nz, .rd
-       ld a, $80
-       cp l
-       jp nz, .rd
-       
-       ld hl, testokstr
-       call puts
-       ret
-.memfail:
-       @ decrement hl the easy way
-       ld a,[hld]
-       push hl
-       ld hl, failatstr
-       call puts
-       pop hl
-       ld a, h
-       call puthex
-       ld a, l
-       call puthex
-       ld a, $0A
-       call putc
-       ld a, $0D
-       call putc
-       ret
-
-memteststr:
-       db "Testing memory from $C000 to $DF80...",0
-testokstr:
-       db " OK!",$0D,$0A,0
-failatstr:
-       db " Test failed at $",0
-puthex:
-       push af
-       rra
-       rra
-       rra
-       rra
-       ld b,$0F
-       and b
-       ld b,$30
-       add b
-       call putc
-       pop af
-       ld b,$0F
-       and b
-       ld b,$30
-       add b
-       call putc
-       ret
-
-waitsw:
-       ld hl,waitswstr
-       call puts
-       
-       ld c, $51
-       ld a, $00
-       ld [c],a
-       
-       ld c, $51
-       ld b, $0
-.loop1:
-       ld a,[c]
-       cp b
-       jp z,.loop1
-.loop2:
-       ld a,[c]
-       cp b
-       jp nz,.loop2
-       ret
-
-waitswstr:
-       db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset.",$0D,$0A,0
-
-putc:
-       push af
-       ld b, 0
-       ld c, $50
-.waitport:
-       ld a,[c]
-       cp b
-       jp nz,.waitport
-       pop af
-       ld [c],a
-       ret
-
-puts:
-       ld a, [hli]
-       ld b, $00
-       cp b
-       jp z, .done
-       call putc
-       jp puts
-.done:
-       ret
-

diff --git a/rom.asm b/rom.asm
new file mode 120000 (symlink)
index 0000000000000000000000000000000000000000..2dfb2b315e3906490c3ec90284560b1b41a4c828
--- /dev/null
+++ b/rom.asm
@@ -0,0 +1 @@
+bootrom.asm
\ No newline at end of file