Re: Working Commodore LCD emulator & specification is available now

From: Gábor Lénárt <>
Date: Wed, 22 Jan 2014 09:33:41 +0100
Message-ID: <>

On Wed, Jan 22, 2014 at 06:35:13AM +0000, Baltissen, GJPAA (Ruud) wrote:
> Hallo Daniel,
> > ... to get the emulator running on something like a Raspberry Pi or Arduino
> > interfaced to a real 480x128 LCD! :-)
> Then what about creating the real machine?
> - I don't know about the availability of the 65C102 but that can be replaced by the 65C02. 
> - the 65C22 and ACIA are available.
> - there is enough info about how the MMU should behave, so shouldn't be a problem either.

This was my idea too :) 65C02 can be safely used, AFAIK 65C102 and 65C02 are
compatible from the software side.  What I thought is to use a 65816 CPU
instead.  CLCD ROMs seem not use bit ops of 'C02 which are not on 65816
(SMB/RMB?  and like).  But then you would have a "16 bit native mode"
(probably with the ability to set the clock to higher frequency as well) of
your "CLCD" capable of addressing more memory etc, but still being
compatible with CLCD.  Maybe the only headache is to create the LCD
controller and MMU, I guess some kind of CPLD or FPGA would be needed, but I
am really not the right person about those PLD topics anyway.  If the
machine has some eg SPI interface built-in it can be even used for "serious
work" eg programming AVRs, using it as a serial terminal and so on. 
Especially if it's packages like a real CLCD so it's easily portable and has
batteries.  Much better feeling than a PC notebook :) :)

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Received on 2014-01-22 09:00:02

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