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| From: Bionic (all posts)
Date: 2000-08-07
Subject: Re: Plus 4 Database Update
|
> On Mon, 7 Aug 2000, [Windows-1252] Tim Böscke wrote:
>
> > I hope the Plus/4 emulators are getting better and are supporting
> > 256kb, soon. (or do they already ? After all it would just be a
> > 10 minute hack) In that case there is no need for a 64kb version :)
>
> Please consider how your program might run on a *different* 256KB
Well - I dont consider changing programs I wrote 5 years ago, sorry :)
> expansion; I have a much simpler one which divides the 64K address space
> into four 16K areas and allows each one to select from 4 independant 16K
> blocks. The 4 blocks are exclusive to that area and may not appear
> anywhere else in the memory map.
>
> Yes it's slightly more restrictive than the Hannes expansion, but *a lot*
> easier to build and I'd like to convert as many 256K programs to use it as
> possible, (a) to show its usefulness as a 256K expansion and (b) to make
> it easier for less technical users to build 256K machines.
Where is the point ? The simple version of Hannes expansion is the most supported 256kb extension. Its not more complex than your version.
(You are using a 6529, ls138 and two ls257 ?)
I'd say main problem for unexperienced users is to desolder the old ram chips.
Btw. Its probably possible to build the simple version of the 256kb extension with a single GAL16V8 and 8x 41256.
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