Texas Instruments 990 with DS10 disk drive?

[Jim Battle]

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).