X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/f26748f71f3f39de15a1c07f95c15f8c4481f452..9e1c03b633deae6254b6df312a48eba6047e266e:/rom.asm

diff --git a/rom.asm b/rom.asm
deleted file mode 100644
index d650855..0000000
--- a/rom.asm
+++ /dev/null
@@ -1,238 +0,0 @@
-	SECTION "a",HOME
-
-main:
-	ld c, $51	; Note that we are alive.
-	ld a, $FF
-	ld [c],a
-
-	ld sp, $DFFF
-
-	ld hl, signon
-	call puts
-	
-	call memtest
-
-	call insntest
-
-	call waitsw
-
-	jr main
-
-signon:
-	db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
-
-; Memory tester: writes h ^ l to all addresses from C000 to DF80.
-memtest:
-	ld hl,memteststr
-	call puts
-	
-	ld hl, $C000		; Write loop
-.wr:
-	ld a,h
-	xor l
-	ld [hli],a
-	ld a, $DF
-	cp h
-	jr nz, .wr
-	ld a, $80
-	cp l
-	jr nz, .wr
-
-	ld hl, $C000		; Read loop
-.rd:
-	ld a,h
-	xor l
-	ld b,a
-	ld a, [hli]
-	cp b
-	jr nz, .memfail
-	
-	ld a, $DF
-	cp h
-	jr nz, .rd
-	ld a, $80
-	cp l
-	jr nz, .rd
-	
-	ld hl, testokstr	; Say we're OK
-	call puts
-	ret
-.memfail:			; Say we failed (sadface)
-	; 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:				; Put two hex nibbles to the serial console.
-	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
-
-; Wait for switches to be flipped on and off again.
-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
-	jr z,.loop1
-.loop2:
-	ld a,[c]
-	cp b
-	jr nz,.loop2
-	ret
-
-waitswstr:
-	db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset.",$0D,$0A,0
-
-; Core instruction basic acceptance tests.
-insntest:
-	ld hl, .insnteststr
-	call puts
-	
-	; Test PUSH and POP.
-	ld b, $12
-	ld c, $34
-	ld d, $56
-	ld e, $78
-	push bc
-	pop de
-	ld hl, .pushpopfail
-	ld a, d
-	cp b
-	jr nz,.fail
-	ld a, e
-	cp c
-	jr nz,.fail
-	
-	; Test ALU (HL).
-	ld hl, .ff
-	ld a, $FF
-	xor [hl]
-	ld hl, .xorhlfail
-	jr nz, .fail
-	
-	; Test JP (HL)
-	ld hl, .jphl
-	jp [hl]
-	ld hl, .jphlfail
-	jr .fail
-	rst $00
-.jphl:
-
-	; Test JR
-	ld a, $FF
-	ld b, $00
-	cp b
-	jr nz,.jr
-	ld hl, .jrfail
-	jr .fail
-	rst $00
-.jr:
-	
-	; Test CP.
-	ld hl, .cpfail
-	ld a, $10
-	ld b, $20
-	cp b
-	jr nc,.fail
-	ld a, $20
-	ld b, $10
-	cp b
-	jr c,.fail
-	
-	; Test CPL
-	ld hl, .cplfail
-	ld a, $55
-	ld b, $AA
-	cpl
-	cp b
-	jr nz,.fail
-	
-	ld hl, .ok
-	call puts
-	ret
-.fail:
-	call puts
-	ld hl, .testfailed
-	call puts
-	ret
-.insnteststr:
-	db "Testing instructions... ",0
-.pushpopfail:
-	db "PUSH/POP",0
-.ff:
-	db $FF
-.xorhlfail:
-	db "XOR [HL]",0
-.jphlfail:
-	db "JP [HL]",0
-.jrfail:
-	db "JR",0
-.cpfail:
-	db "CP",0
-.cplfail:
-	db "CPL",0
-.testfailed:
-	db " test failed.",$0D,$0A,0
-.ok:
-	db "OK!",$0D,$0A,0
-
-; Serial port manipulation functions.
-putc:
-	push af
-	ld b, 0
-	ld c, $50
-.waitport:
-	ld a,[c]
-	cp b
-	jr nz,.waitport
-	pop af
-	ld [c],a
-	ret
-
-puts:
-	ld a, [hli]
-	ld b, $00
-	cp b
-	ret z
-	call putc
-	jr puts
diff --git a/rom.asm b/rom.asm
new file mode 120000
index 0000000..2dfb2b3
--- /dev/null
+++ b/rom.asm
@@ -0,0 +1 @@
+bootrom.asm
\ No newline at end of file