My Kestrel emulator defines a graphics architecture which is capable of displaying bitmaps only -- no text mode at all. Therefore, my character set uses a font which is row-major, not column-major, already.

You can fetch a copy of this character set here if you want:

http://www.falvotech.com/content/kestre ... o/font.bin

Hi again,

I'm getting an error when trying to execute

lda(pointerlo),y

it tells me that "Indirect postindexed addressing mode requires byte operand"

Maybe Garth was right afterall....???

Indirect addresses with indexing must appear in direct page (aka zero page for 6502 systems).

I'm using byte FE and FF of ZP for the pointers... ??

How is pointerlo defined?

In some assemblers, if you use this:



it will still attempt to treat any use of it as a 16-bit absolute address. If this is the case, try changing it to just:



Such assemblers should then recognize it as a simple byte-sized operand.

I don't know why or how this convention started (it dates back at least to the late 70s, since Commodore PET assemblers tended to behave this way too). It is very annoying.

What's in the assembled code? The line should say
B1 FE
(I double checked this time with WDC's programming manual instead of the book I knew had an error and used anyway before ) It's strange that you would say, "I'm getting an error when trying to execute". Is this with a simulator? Or do you mean "when trying to assemble"?

Yes, I meant assemble... sorry.... using terms from the old BASIC days....

My problem was a stupid one... I was specifiying the value in decimal instead of hex.... duh....

$254 instead of $FE

Sorry....

Just thought I would let everyone know that "bogax" code worked great, and I find it simple, and straight forward.

Thanks a bunch.