On 25 d=E9c, 04:38, lyricalnanoha 
wrote:
> Ouch. =A0Got wedged trying to pull this off, perhaps I'm interpreting the
> hardware wrong. =A0Looks like it's trying to write in bank 0 instead of b=
ank
> 1. =A0(I'm using the //e way to access bank 1, according to the docs I ha=
ve,
> rather than trying to go '816 and do it that way, as I don't yet
> understand 65816 mode.)
>
> The way I *wrote* the code, I meant it to leave ][+ space readable while
> making //e space writable. =A0(It doesn't seem to have done that.) =A0Whe=
ther
> I .org this high or low, it still gets wedged. =A0(There's nothing
> IIgs-dependent about the code beyond the C029 thing.)

Note that the official IIgs screen location is at bank $E1. Writing to
bank $01 (fast RAM) is great but once you master the shadowing
process.

If I were you (and God knows I was a long long time ago), I would
avoid writing standard II code on a IIgs, the IIgs is a fun machine
and its 16-bit processor, though simple, is easy to understand.

By the way, at least, use ProDOS instead of DOS 3.3.

>
> I'm trying to create a memory environment conducive to plotting pixels in
> 320x200x16 mode. =A0The palette approximates EGA.
>
> -uso.
>
> setty: =A0 =A0lda =A0 =A0 =A0 $C029
> =A0 =A0 =A0 =A0 =A0 =A0ora =A0 =A0 =A0 #$80
> =A0 =A0 =A0 =A0 =A0 =A0sta =A0 =A0 =A0 $C029

When you are ready to go for IIgs coding, use TSB.

> =A0 =A0 =A0 =A0 =A0 =A0bne =A0 =A0 =A0 {at}1
> =A0 =A0 =A0 =A0 =A0 =A0bne =A0 =A0 =A0 {at}2

Replace with BPL

As already said by Charlie, the $C004/$C005 softswitches require a STA
not a BIT.

Good luck and Merry Christmas,

Antoine
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