Re: CACHE????

[rubywand@aol.com (RUBYWAND)]

In article <4ro5hv$8lt@nyx10.cs.du.edu>, wbaguhn@nyx10.cs.du.edu (Will
Baguhn) writes:

>
>Heck... as long as we're dreaming, how about an 8 Mhz bus with a 15 Mhz
>processor on it, ON the mainboard?  Since we're building a new board
>anyway (my dream!  we can do it!), how about something more towards
actual
>slot arbitration (the ROM 3 idea that slot 1 or 2 needed to be set to
>appletalk
>for appletalk to run is preposterous)?  up to 15 megs RAM on the main
board?
>new memory manager to support it?  FULL DMA? ....
>

     Doing heavy-duty motherboard mods, such as swapping out the FPI
controller (or patching-on logic hardware)  has the disadvantage of
closing out the many users who will not get the mod.

     Adding what amounts to a Plug-In New-GS computer board would supply
your wants. The board has its own 20MHz 65C816, plus 12MB RAM and 4MB for
ROM/FlashRAM + I/O space. 

     Slots on the PIN-GS board could accomodate PCI peripherals for SVGA
video, 32-bit sound, IDE and/or SCSI controllers, etc.. Using 1MB of fast
RAM for cache, you could easily run the PCI Slot bus at full 65C816 speed;
and, in PIN-GS mode you would have full DMA access to 12MB RAM. The board
could run the 'old GS' system as an accelerator card.

     Fitting such a system into your GS with minimal loss of 'old Slots'
could be done by pulling the power supply and mounting the new board
vertically on the left side of the case. (The whole system could be
powered by an external Buggie PS.)  PCI boards would plug in horizontally.


Rubywand