Re: Transwarp GAL chips

[pubpc1@library.ucla.edu]

Ecitnerppa wrote:
> Personally, I've been desperately trying to get my cache up to 32K. I only own
> one Transwarp, but I've got two 8K cache cards, both REV A, both version 1.5 of
> the firmware ROM. There are several questions raised by this:
> 
> Are there later revisions of the cache card? I've put 32K SRAM chips in one
> card, cutting some "bowtie" connections and soldering others in order to
> impliment the additional address pins. There are some ambiguous connections,
> however. Two of the bowtie connections I did not sever, because they would
> leave the address line "hanging" without any provisions to connect them
> anywhere else. There were only two such of these, one SRAM didn't have one.
> 
> Does the resistor get cut/removed?
> 
> The Transwarp may or may not use the /RESET pin on 8K SRAMs (when present). It
> is implimented on the 8K configuration, replaced by an address line on 32K
> implimentation, yet only one of my 8K cache boards has "resettable" SRAM chips.

Problem is, you need a different ROM to use the extra memory.
Point your web browser to:

http://ground.isca.uiowa.edu/apple2/apple16/Hypermedia/Hypercard/
and download TWGSupgrade.SHK or TWGSupgrade.BSQ from the list of
files.  This is a stack that will tell you, among other things,
where to get the source of the ROM upgrade.  If you don't have
HyperCard IIGS, the runtime player is available from this list as
HCGSPLAYER.SHK (it lets you run, but not create, stacks).

Specifically, ///SHH Systeme is now licensed to provide the ROM
upgrade.  With the new ROM, you will see your memory.

-Scott G.