Problem using word variable to access screen array

[odflor]

The output of this program is not the spected.

Instead of fullfill the screen with petscii characters, only fills the first 256 screen positions.

If I see the assembler generated code is because uses only the low bytes to do the assigment.

;screen[i] := b; $0823 A5 F9 LDA b $0825 A6 F7 LDX i@0 <-----only use low byte $0827 9D 00 04 STA $0400,X

program Hello; //uses Commodore128; uses Commodore64; var i : word; b : byte; begin b := 0;

for i := 0 to 999 do screen[i] := b; <---- here is the problem inc(b);

if b > 254 then
  b := 0;
end; // if

end; // for

screen[999] := 0; <---- using constants works very well asm RTS end end.

[t-edson]

Hi. I've identified the problem. This is a feature lost when redesigned the Code generator. Currently this is a failure in the Optimizer. I remember I considered to implement this using a register in Zero page. I will be checking it in this days.

[t-edson]

Hi. The issue for assigning to arrays of bytes, is fixed now. There are still some issues to work with arrays but you can work OK with arrays of bytes.