Re: PET 64k extension

wlevak_at_sdf.org
SDF Public Access UNIX System - http://sdf.org

---------- Forwarded message ----------
Date: Thu, 30 Jul 2020 06:44:59 +0000 (UTC)
From: William Levak <wlevak_at_SDF.ORG>
To: cbm-hackers_at_musoftware.de
Subject: Re: PET 64k extension


Pages 1-25 are the SuperPet documentation.
Pages 26-57 8032 Universal Dynamic Pet with board version 8032090-01
Pages 58-71 are 64K memory board (it appears to be different than the SuperPet 
64K board, but I will have to examine more closely to be sure.)

pages 68-71 are the same as pages 59-62, but poorer quality.

There are 2 versions, revision D and revision E. The main difference 
appears to be that revision E has removed a number of line drivers.

Sheet 4 of the schematics shows a 74LS273 8 bit register at the lower 
left. The logic enabling it appears to respond to address $FFF0. This is the 
address of the 8096 64K board. The SuperPet 64K board register is at 
$EFF8.

It appears that these pages should'nt be in this documant.

Sheet 3 of the schematics shows a 3242 IC at UB3. I cannot identify this 
chip.


BTW pages 5 and 7 are the same.

     Page 5 should actually be parts list 324038 sheet 2 which is in the
     same directory as a .GIF file.

On Wed, 29 Jul 2020, Mike Naberezny wrote:

> Date: Wed, 29 Jul 2020 13:31:55 -0700
> From: Mike Naberezny <mike_at_naberezny.com>
> Reply-To: cbm-hackers_at_musoftware.de
> To: cbm-hackers_at_musoftware.de
> Subject: Re: PET 64k extension
> 
> On 7/29/20 12:20 PM, William Levak wrote:
>> No. The Superpet 64K board is entirely different.
> 
> That is true but despite the PDF filename, it does indeed include pages about 
> the 8096 board.  This can be seen most easily on page 52 that Steve Gray 
> pointed out, which has a mechanical drawing of the board.  That is the 8096 
> board.  It seems that this PDF has SuperPET and 8096 documentation mixed 
> together.
> 
> Regards,
> Mike
> 
> -- 
> Mike Naberezny (mike_at_naberezny.com) http://6502.org
> 
> 
>

wlevak_at_sdf.org
SDF Public Access UNIX System - http://sdf.org