2013-02-21, 10:57 PM
I've expanded the routine so it can also save and restore portions of the screen:
It adds 2 new parameters: mode (1=clear, 2=save, 3=restore) and address (where the data will be saved to/restore from)
Cheers!
Code:
CLS
FOR n=1 TO 300
PRINT n;
NEXT n
screenBox(2,3,18,11,2,35000)
pause 0
screenBox (2,3,18,11,1,35000)
pause 0
cls
screenBox (3,11,18,11,3,35000)
screenBox (4,9,18,11,3,35000)
pause 0
end
SUB screenBox(x AS UBYTE, y AS UBYTE, width AS UBYTE, height AS UBYTE, mode AS ubyte, address AS uinteger)
ASM
push de
ld d, (ix+15)
ld e, (ix+14)
ld (counter),de
ld a, (IX+13)
ld (modeflag),a
pop de
ld b,(IX+5)
ld c,(IX+7)
ld a, c
AND 24
OR 64
ld h, a
ld a, c
AND 7
rra
rra
rra
rra
add a, b
ld l, a
ld b, (IX+11)
ld c,(IX+9)
resbox_outer_loop:
XOR a
push bc
push hl
ld d, 8
resbox_mid_loop:
ld e,l
ld b,c
ld a,(modeflag)
sub 2
jp z,saveMode
ld a,(modeflag)
sub 3
jp z,restoreMode
ld a,0
clearMode:
ld (hl),a
inc l
djnz clearMode
jp goOn
saveMode:
push de
ld de, (counter)
saveBox_inner_loop:
ld a,(hl)
ld (de),a
inc l
inc de
djnz saveBox_inner_loop
ld (counter),de
pop de
jp goOn
restoreMode:
push de
ld de, (counter)
resbox_inner_loop:
ld a,(de)
ld (hl),a
inc l
inc de
djnz resbox_inner_loop
ld (counter),de
pop de
goOn:
ld l,e
inc h
dec d
jp nz, resbox_mid_loop
pop hl
pop bc
ld a, 32
add a, l
ld l, a
jp nc, resbox_row_skip
ld a, 8
add a, h
ld h, a
resbox_row_skip:
djnz resbox_outer_loop
END ASM
END SUB
ASM
counter:
defb 000,000
modeflag:
defb 000
end asmIt adds 2 new parameters: mode (1=clear, 2=save, 3=restore) and address (where the data will be saved to/restore from)
Cheers!