18 bit CPU; was: Speed now & then

[ben]

On 4/12/2018 6:51 PM, Chuck Guzis via cctalk wrote:
> On 04/12/2018 03:16 PM, ben via cctalk wrote:
>>
>> Well I have one better with my cpu, a char is -128 to 384.
> 
> Care to elaborate on why such a lopsided range?
> 
> --Chuck
> OK, you forced me to go back to 8 bit unsigned bytes.
Not really, but having 8 bit disk IO is tad simpler.
Indexing is still -128 to 384 offset. This gives a good
sized page 0 and high address (07773xx) i/o out page.
Ben.