alexandre-listas at e-secure.com.br
Mon Oct 1 18:23:06 CDT 2007
> I assume the grahpics chip is a TMS9918 or similar. In which case you can
> hang RAM off that, it doesn't appear in the main CPU memory map, but is
> accessed thorugh some registes in said chip. I'd heard that on an
> unexpanded 99/4A _all_ the RAM was on the video chip, your BASIC program
> was stored in said RAM, and the interpretter (in ROM, in the CPU address
> space) had to read your program via the video chip registers.
> This (a) made the machine very slow and (b) made it impossble to program
> in machine code.
I'd not say that is impossible, but I'm hardly pressed to believe that!
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