Re: C64 ROMs on a MAX?

From: Marko Mäkelä (
Date: 2001-02-08 15:43:12

On Thu, 8 Feb 2001, MagerValp wrote:

> I'm pretty sure the MAX has the $dc00 CIA but not the $dd00 CIA -- the
> VIC address lines are just kept low, as it can only address 16K of
> RAM. The rest of the stuff in the $dd00 CIA is useless in a MAX as it
> doesn't have a serial or a user port.

Maybe the reason why the $dd00 CIA lines connected to VA14 and VA15 in the
C64 are inverted is that there would be picture at the lowmost bank by
default.  By the way, the MAX has a 6566, which has non-multiplexed
address lines, which makes it usable with static RAM.  I don't remember if
I already asked this, but does the "ALWAYS SET THIS BIT TO x" bit (I don't
remember whether x=0 or 1, I think it was in $d016 or $d018) have any
function in the 6566?  It has been called the RESET bit in some


This message was sent through the cbm-hackers mailing list.
To unsubscribe: echo unsubscribe | mail

Archive generated by hypermail 2.1.1.