Re: Transwarp GAL chips

[ecitnerppa@aol.com (Ecitnerppa)]

> I looked at the TWGS Speed Upgrade HyperCard stack.
>
> It says that the GALs were needed to slow the processor
> down for certain operations, because the chips weren't very
> good.
>
> So, if you upgrade the speed on your TWGS, do the GALs 
> still slow down those operations?  That would slow down the
> maximum speed, wouldn't it?

Geez, that would mean that having the _older_ GAL's (except 2B, the DMA fix)
would preferable. Perhaps some speed comparisons could be done between the
different GAL versions on two otherwise identical Transwarps? 

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.