Assembly question

[slenkar]

yes that is what I need for sprites,

but I am trying to do some scrolling

got it to work

Code:

function FASTCALL drawthis() as ubyte
asm
LD HL,16384
LD BC,8

;LD A,3
;RRC A
;RRC A
;RRC A
OR 7
LD L,A

drawblokes:
LD A,255
LD (HL),A
INC H
DEC BC
LD (blockiter),BC
LD BC,(delayiter)
wait1:
    dec BC
    ld a,B
    or C
    jr nz, wait1
    
LD BC,(blockiter)
LD A, B  
OR C
JP NZ,drawblokes



LD BC,8
LD (blockiter),BC
LD A,31
LD (screenwidthiter),A
LD A,7
LD (screenheightiter),A

LD HL,6000
LD (scrolliter),HL
LD DE,(scrolliter)

LD HL,16384

scroll:
DEC DE

LD BC,(delayiter)
wait2:
    dec BC
    ld a,B
    or C
    jr nz, wait2

LD B,(screenwidthiter)
;LD C,(screenheightiter)
screenhori:
LD L,B

;shift graphic
LD A,(HL)
RLA
LD (HL),A



DEC B
LD A,B
jr nz,screenhori
    
    
LD DE,(scrolliter)
LD A, D  
OR E
jp nz,scroll

    end asm
end function

drawthis()

Print "done"

STOP

ASM
blockiter:
defw 8
delayiter:
defw 60000
screenwidthiter:
defb 31
screenheightiter:
defb 23
scrolliter:
defw 10000
end asm

I slowed it down intentionally so you can see whats going on