Re: 14MHz 65816??

[lesherjt@vuse.vanderbilt.edu (Tilghman Lesher)]

Tony Cianfaglione (tony@ccn.cs.dal.ca) wrote:
:    I have been in contact with Western Digital regarding their 14 MHz 
: 65816 chip which they tell me fits onto the accelerator cards such as the 
: TransWarp GS or Zip GS.  They were not sure if it would replace the stock 
: GS chip that plugs into the motherboard, which is what I want to do.  I 
: find the various accelerator cards too buggy to rely on.

:    They keep crashing in the middle of vital projects and I'm forced to 
: disable the cards and run at the native speed.  Is anyone familiar with 
: the 14 MHz chips and can you get one to plug into the motherboard and 
: chuck the accelerator cards altogether?

Nope; can't do this.  Remember that the regular 2.8 MHz chip slows down
to 2.6 MHz because of the 1 MHz bus speed.

The accelerators are able to work that fast because they use a type of
memory called "cache", which quite simply is, fast memory.  The cache
is "mirrored" back to regular RAM ever so often, so that memory stays
intact.

If you wanted to use an accelerated chip on the motherboard, you'd have
to modify the motherboard to speed up the bus, get faster RAM, and hope
to God that it works (probably won't).

Just get a Zip accelerator...  A card is the only (reasonable) way to
increase the speed of your IIgs.

Tilghman