[sdiy] ROM duplication

[Theo]

I too am very interested in getting the modification.
A rom dump and circuit diagram would be enough to rework the mod.
Probably even only the rom dump will do.
So far I understand the rom modification is needed to prevent the MT32 from
clearing the ram at startup.
The rest is just disabling the DRAM and adding a SRAM with battery backup.

Theo

------------------
----- Original Message -----
From: Ullrich Peter <Ullrich at kapsch.net>
To: 'Greg Montalbano' <Greg.Montalbano at ucop.edu>;
<synth-diy at node12b53.a2000.nl>
Sent: Thursday, March 01, 2001 6:13 PM
Subject: AW: [sdiy] ROM duplication


> >I was just about to ask about ROM duplication, myself.
> >I have an old third-party mod for the MT-32 that allows patch & program
> >info to be retained in memory when the power is turned off -- wanted to
> >share this with some other folks, but the company that originally made
this
> >mod is long gone, and I'm not sure I really want to buy a ROM burner & go
> >into business for myself.
> >Anybody set up to do this kind of thing?  Or, do you know where such a
> >service is available for small-scale, one-time customers?
>
> I have a good eprom programmer and also a MT32 (unmodded) so I am very
> interested in doing this job / getting the modification.
>
> But first it would be good to check the chip number if my programmer
> support reading/programming for this chip. Also the layout of the PCB
> should be scanned / duplicated.
>
> Ciao
> Peter
>
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