Re: New CBM-II discoveries

From: Bill Degnan <billdegnan_at_gmail.com>
Date: Mon, 25 Jun 2018 08:38:01 -0400
Message-ID: <CABGJBue+TksMWV1i-kf+cJ_7X01QaCiXG3GiQSWhJKVjiyghRA@mail.gmail.com>
On Mon, Jun 25, 2018 at 4:25 AM smf <smf@null.net> wrote:

> On 24/06/2018 02:32, Steve Gray wrote:
>
> > you probably need to repeat the same draw command with a different plane
> selected corresponding to the on bits of the desired colour.
>
> Using one port on the 6523 you can select which (any or all) of the
> drams will receive write strobes.
>
> The data in on each chip has an or gate, which is fed by another 6523 port.
>
> There is some RMW stuff going on that I don't understand.
>
> It is likely you can draw colour in one operation.
>
>
>
> Will it be 160 x 100 hi-res mode? black, blue, green, cyan, red, magenta,
yellow, and white...64 color combos.  There is I read for the 8032 color
that never launched a 32K Screen Edit ROM.  Works with BASIC 4 and if this
ROM exists may be convertable to be used in the CBM-II
b
Received on 2018-06-25 15:00:04

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