TI-99/4A Floppies

[Chuck Guzis]

On 2 Oct 2007 at 15:33, Brent Hilpert wrote:


> Though IIRC, with a well-designed stack management policy, the register
> frames could overlap, so as long as one didn't use the registers in
> overlapping memory you were fine. You were not obligated to grab a fresh 16
> words of memory on every function call. Equivalent in more conventional archs
> to deciding how many machine registers you're going to save based on usage on
> a function call rather than saving them all without question.

Agreed.  But 128 words still doesn't leave much room for variables 
beyond those that can be stored in the registers of each frame.  
There's a comment on one of the 99/4A sites that 1,024 bytes of RAM 
were originally planned, which is more reasonable.  I doubt that TI 
saved very much by using the 256 byte part.

Cheers,
Chuck