Re: More help please gentlemen.
Posted: Tue Nov 10, 2020 8:38 am
Moggy,
Do you use this big buffer for something else, or just to count "1"-s?
In the latter case you don't need buffer, just this counter:
Do you use this big buffer for something else, or just to count "1"-s?
In the latter case you don't need buffer, just this counter:
Code: Select all
; 2 REM
.org 16620 ; 16514+106
ld hl,16514 ; 1 REM (100 bytes)
ld bc,0 ; the counter
ld d,100 ; 100 bytes to count
nxt_byte
ld a,(hl) ; a byte
ld e,8 ; 8 bits in a byte
next_bit
rla ; test bit 7
jr nc,equ_zero ; skip if zero
inc bc ; else set "1"
equ_zero
dec e ; set bit counter
jr nz,next_bit ; last bit in byte?
inc hl ; set byte pointer
dec d ; set byte counter
jr nz,nxt_byte ; back until done
ret ;
.end
