[sdiy] kawai k1 II + wavetables +TR-707 O.S

[Colin Fraser]

> -----Original Message-----
> From: owner-synth-diy at node12b53.a2000.nl
> [mailto:owner-synth-diy at node12b53.a2000.nl]On Behalf Of Plutonique9
> Sent: 10 April 2001 04:53
> To: synth-diy at node12b53.a2000.nl
> Subject: Re: [sdiy] kawai k1 II + wavetables +TR-707 O.S
>
> ***Oh yeah, while i'm at it, I need to ask if anyone is familiar with
> the TR-707/727 operating system.
> The 707/727 has a "major" flaw in that it will not send out midi note
> information (from the sequencer) while it is in "pattern write" mode.
> In a nutshell, it almost wipes out the possibility of using its X0X
> sequencer to program external midi devices (samplers).
> This is because the 707/727 will only send out midi note data when
> the machine is set to "track play", but because you can't hear the
> patterns while you are programing them, uh, you can see how it sux.
> I think the 707/727 would have been an incredible drum sequencer, if
> only the IDIOTS at Roland had simply enabled Midi Note data in
> "pattern write", like with the TR-909.
>
> So, In the end, can this be fixed, more so, does anyone on Synth-DIY
> feel they could correct this? If needed I could make a Rom Image of
> my TR-727's eprom........well its worth a shot anyway, If anyone can
> do it, they are on this list :)

Grrr. As if I don't have enough to do without a useful idea like this
nagging me.
I've got a 727. I remembered the eprom was soldered directly to the board,
so I didn't pay much attention last time I was inside it.
Had another look tonight, and the CPU is a 6303 - a Hitachi CPU with a 6801
core.
I wrote a disassembler for this CPU when I got bogged down fixing the sysex
code in the shitty firmware of the JX10.

To cut a long story short, I'm now looking at a 300k disassembly of the 727
firmware, wondering wtf I'm doing getting into this sort of thing again...

If your version is any later than 1.0, an image might be useful.

Don't expect anything soon !


Colin f