Re: TED based motherboard

From: Marko Mäkelä (
Date: 2007-03-28 10:15:57

On Wed, Mar 28, 2007 at 09:39:33AM +0200, MagerValp wrote:
> >>>>> "AC" == Anders Carlsson <> writes:
> AC> I need to get access to an EPROM reader/burner to dump those chips
> AC> safely. The 2764:s I could read off a C64 cartridge with EPROM
> AC> slots, but I don't think I have anything to read the 27128.
> Couldn't you put it in the expansion socket in a C128? I don't have
> the pinout handy, but I think you'd be ok.

Yes, that should be OK, and Anders should be able to use the machine
language monitor to read it.  I don't know which bank, but I'd try
the following commands:

m 48000 4bfff

with 4 replaced by 8 or c
and 8,b replaced by 4,7 or c,f (or 0,3 - very unlikely)

If I remember correctly, the function ROM socket is for a 27256 (32
kilobytes).  The 27128 is only 16 kilobytes, so it should show up
as two identical copies at successive addresses.

It is possible that the KERNAL doesn't support a bank configuration
where the function ROM is visible.  If none of the above commands work,
you can write a simple copying program in machine language that switches
MMU banks and copies the data to RAM, where it can be examined by the
machine language monitor.


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