Fill Routine

[britlion]

I'm also wondering which one is faster!

I think they have to be....similar. Given they are byte for byte identical:

Code:

;        
; enter: HL = valid screen address        
; exit : Carry = moved off screen    ;; Given an HL screen position, calculates
;        HL = moves one pixel up    ;; the above position
; used : AF, HL                ;; Also updates BC coords
                          __INCY:
SPPixelUp:              inc b
   ld a,h                ld a, h
   dec h                 dec h
   and $07              and 7
   ret nz                ret nz
                         ex af, af'  ; Sets carry on F'
                          scf         ; which flags ATTR must be updated
                          ex af, af'
   ld a,$08             ld a, 8
   add a,h              add a, h
   ld h,a                ld h, a
   ld a,l                ld a, l
   sub $20              sub 32
   ld l,a                ld l, a
   ret nc                ret nc
   ld a,h                ld a, h
   sub $08              sub 8
   ld h,a                ld h, a
   cp $40        
   ret                    ret