USR quad modems... (ontopic - really!)
THX1138 at dakotacom.net
Wed Aug 16 17:14:56 CDT 2006
Roger Merchberger wrote:
[12 modem cards]
> Each "modem section" has:
> an Intel 80C186 (same chip as in the Tandy 2000) - except they're rated
> for 20Mhz...
> a TI/USR DSP chip, which is prolly useless outside of the intended use
Some of the DSP's are "general purpose" -- external program
store. However, since you called it a "TI/USR" part, I assume
it has a USR house number on it and, as such, is probably
a masked part. If so, "useless outside of the intended use" :>
> 2 each 32Kx8 static ram chips,
> 4 each 128Kx8 static ram chips
> and lots of other 8/16-bit 74-series buffer chips & whanot.
> So, *if* I can get a Dynamic-RAM -> Static RAM converter board designed
> for the CoCo, I could upgrade 4 CoCo3s to 512K with each modem board.
What's the issue *preventing* this from happening?
(unfamiliar with the internals of a CoCo3)
> Roger "Merch" Merchberger -- SysAdmin, Iceberg Computers
> zmerch at 30below.com
> What do you do when Life gives you lemons,
> and you don't *like* lemonade?????????????
Use it to flavor your *tea*!
(which is what the 7 - 10G of fresh lemon juice from the
tree in the side yard gets used for each year :> OTOH,
finding a suitable use for all the *lime* juice is a bit
harder -- there's only so much guacamole you can eat!
Yet, the juice from the blood orange magically seems to
More information about the cctalk