Re: WOLF3D fot A2 GS

[supertimer@aol.com (Supertimer)]

spec@vax2.concordia.ca (Mitchell Spector) wrote:

>ZipGS is clearly the superior product.
>
>TransWarp GS
>------------
>- Original firmware does not support beyond 6.25 MHz

The great majority of TWGS came with 7Mhz CPUs and the
ROM v1.5 firmware that supports speeds up to 15Mhz.

>- Not DMA compatible

Says who?

>- Compatibility issues with certain software and hardware

Not!  It is just as transparent as the Zip GS.

>- Poor stability (newer CPU cable and cooling may fix this though)

Quite stable.

>- Requires newer GAL chips for high speeds with pre-1993 65C816's

And who is using such pre-1993 chips anymore?  The current
65C816s don't need any such GAL replacements.

>- Simple to upgrade (daughterboard and oscillator socketed)
>- ROM based software to adjust speed/configure of card
>- More efficient caching method, runs slightly faster

Yup.  You can still get a blank daughterboard that has
skinny SRAM sockets.

>>If your TWGS card is capable of 15Mhz, it will go at that speed
>>without soldering. Swapping SRAMs maybe, but never soldering.
>
>    Aren't you required to cut some trace on the back of the
>board? That is much easier than soldering, but still requires
>some degree of skill and a steady hand.

Nope.  You need to cut the trace when upgrading to a larger
cache, but you DON'T need to cut the trace when upgrading
CPU speed.  Also, the SRAMs supplied on the stock daughterboard
are quite usable at speeds of up to 12.5Mhz.

That means to push a TWGS to 12.5Mhz, you just swap the CPU
and oscillator.  I've read of some units that go faster.