X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/4fd47c85d2419ac8fa788696f7fda03cf3ce8124..f356a7356f41bc0681ac3e3013d8cf335c9e8423:/diag.asm diff --git a/diag.asm b/diag.asm index e9a9f19..668452d 100644 --- a/diag.asm +++ b/diag.asm @@ -33,6 +33,9 @@ main: ld hl, signon call puts + ld a, $91 + ld [$FF40], a + call putscreen ei @@ -141,30 +144,19 @@ vbl: ld [$FF0F], a ld a, [$FF51] - ld b, a - and $80 - cp $80 - jr nz, .nothing - ld c, $0 + bit 7, a + jr z, .nothing - ld a, b - and $1 - cp c + bit 0, a call nz, .scyup - ld a, b - and $2 - cp c + bit 1, a call nz, .scydown - ld a, b - and $4 - cp c + bit 2, a call nz, .scxup - ld a, b - and $8 - cp c + bit 3, a call nz, .scxdown .nothing: