Texas Instruments 990 with DS10 disk drive?

From: Jim Battle <frustum_at_pacbell.net>
Date: Wed Feb 23 20:47:32 2005

Tom Jennings wrote:

> On Wed, 23 Feb 2005, steven stengel wrote:
>
>> I can (probably) obtain a Texas Instruments 990, with
>> a 5-foot desk and DS10 disk drive.
>>
>> I don't know much about it, or even what's all
>> included, or what it will cost, but is this something
>> someone here would like to have if I turn it down?
>
>
> Grab it!
>
> Doesn't the 990 have a weird architecture, like no registers, but
> every "page" of memory has registers in the low numbers? Some wierd
> memory-to-memory paradigm...

close -- the 9900 has a pointer to memory where the 16 registers live.
to do a context switch, change this pointer to another set of 16
registers (i'm sure status and other stuff would have to be changed too).
Received on Wed Feb 23 2005 - 20:47:32 GMT