Re: MAX Machine PLA

From: Segher Boessenkool <*segher_at_kernel.crashing.org*> Date: Sun, 31 Jul 2016 09:48:02 -0500 Message-ID: <20160731144802.GC12697@gate.crashing.org> · segher_at_kernel.crashing.org

On Sun, Jul 31, 2016 at 02:40:48PM +0200, Michał Pleban wrote:
> > The max and the c64 have about as much in common hardware wise as the
> > P500. Designed by different people & the max uses the static ram version
> > of the vic.
> 
> That's not really a good comparison. The MAX is really a subset of C64,
> the only real difference being static vs. dynamic RAM (but it is not
> visible to the programmer) and C64 can emulate it almost perfectly.

The c64 has a second CIA to support the added serial port and user port.
It also has ROMs, and it has more RAM (and yeah, DRAM).

Other than that it is very obviously based on the MAX machine (pretty
weird memory map to be compatible, many things the same, etc.)

Same with VIC-II: the 6566 is a very nice and clean design (what I can
reconstruct from it anyway, I haven't seen an actual die photo)...  The
DRAM versions, not so very clean.

Segher

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