Well, maybe not that much of a difference. More noise & they'd have to
be compressed again. Actually, it's becoming easier the notion of ROM
replacments, I'm excited.....I wasn't too looking forward to designing
a PCB and having them made up.

I've also go the firmware disassembled from Colin Fraser. He's sold
his 727, but was kind enough to give me the firmware .bin & the
disassembled code, ASM for the HD6303 CPU. That's gonna be the
trickiest thing, cause I don't know assembley language... I've only
been doing C++ since the beginning of this year. Anyone in here know
ASM The HD6303 datasheet lists all the registers......

Cheers

Ryan

--- In tr-707@yahoogroups.com , "thom uliasz" <dsl_tru@...> wrote:
>
> wow ryan..
> this is getting quite complex! but you still seem to have a plan of
attack,
> there's still hope.
> I wouldn't think there would be much difference between samples of the
> original 7x7 sounds, and the original sounds themselves. no
> -Thom
>
>
>
> From: tr-707@yahoogroups.com
> Reply-To: tr-707@yahoogroups.com
> To: tr-707@yahoogroups.com
> Subject: [tr-707] Digest Number 148
> Date: 5 Apr 2006 10:43:53 -0000
>
> There is 1 message in this issue.
>
> Topics in this digest:
>
> 1. TR-707 ROM update
> From: "plutoniq9" <Plutonique9@...>
>
>
> ________________________________________________________________________
> ________________________________________________________________________
>
> Message: 1
> Date: Wed, 05 Apr 2006 06:41:36 -0000
> From: "plutoniq9" <Plutonique9@...>
> Subject: TR-707 ROM update
>
> Well,
>
> I've spent way too much time trying to read the ROM's from the
> 707/727....I got close but i came across a tricky requirement in order
> for the ROMS to output data. The last problem makes it near impossible
> to read the ROM's from a standard eprom programmer, even after I
> solved the mixed-up address lines etc.
>
> But that doesn't mean new ROMS cant be made. The protection Roland
> used is burned into the functioning of the Mask ROMs, standard 27c256
> replacements wouldn't have this requirement.
>
> Also, some good news. I've been talking to Colin Fraser recentley & it
> seems he has written a piece of software that will re-arrange the data
> in a ROM .bin file, so that it can adapt to non-stndard address & data
> line pin definitions. What this means is that a converter board won't
> be necessary to burn new ROM's for the 707/727. All that one needs is
> an understanding how the data is arranged in memory, and the 707
> service manual gives a table which show's exactly how this is so. If
> we get to the point where we want to create multiple banks (which
> would be cool), we would have to settle creating new 707 & 727 banks
> from samples of the machines.....reading the original ROM's is just
> gonna be next to impossible.....
>
>
> Seeya
>
> Ryan
>
>
>
>
>
>
> ________________________________________________________________________
> ________________________________________________________________________
>
>
>
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