Memory Management

[Darkstar]

Note: there is already both SetAttr and GetAttrAddr routines in <attr.bas>. Did you had a look to them? Maybe what you want was already there... I'm now checking this bug.

Thank you.

Yes, there was something there and here is the reworked version of the
sub.

Code:

Declare sub SetAttr (ByVal Line as ubyte, ByVal Column as ubyte, ByVal NumberOfCells as uinteger)

Sub SetAttr (ByVal Line as ubyte, ByVal Column as ubyte, ByVal NumberOfCells as uinteger)

Asm
ld e, (ix+7)
ld d, (ix+5)
ld h, 0                     ;  7 T-States
ld a, d                     ;  4 T-States
add a, a     ; a * 2        ;  4 T-States
add a, a     ; a * 4        ;  4 T-States
ld l, a      ; HL = A * 4   ;  4 T-States
add hl, hl   ; HL = A * 8   ; 15 T-States
add hl, hl   ; HL = A * 16  ; 15 T-States
add hl, hl   ; HL = A * 32  ; 15 T-States
ld d, 18h ; DE = 6144 + E. Note: 6144 is the screen size (before attr zone)
add hl, de
ld de, (SCREEN_ADDR)    ; Adds the screen address
add hl, de
;ld c, (ix+8)
;ld b, (ix+9)
;ld b, 0
ld b, (ix+8)
ld a, (23693)
;ld e, a
SetAttrCopy:
;ld (hl), e
ld (hl), a
inc hl
djnz SetAttrCopy
;dec bc
;ld a, b
;or c
;jr nz, SetAttrCopy
End asm

End sub

Nothing in the global scope, some of this is inline addition from attr.asm.