Re: [oberheim] Re: Matrix-6 display issues?
2014-10-23 by Daniel Forró
Thanks in advance! Daniel Forro On 23 Oct, 2014, at 8:39 PM, Bob Grieb bobgrieb@yahoo.com [oberheim]
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Re: [oberheim] Re: Matrix-6 display issues?
2014-10-23 by Bob Grieb
Yes. I just got distracted by a Rhodes Chroma that suddenly arrived at my house.
Re: [oberheim] Re: Matrix-6 display issues?
2014-10-23 by Daniel Forró
Somehow it didn t continue, it was discussed here in March... Bob, is there still some hope to finish this project you have offered? Daniel Forro
Re: Matrix-6 display issues?
2014-10-23 by alamber1@...
Hey everyone. I just joined this group, and happen to have an M6r with a dead display on my hands. Did this project ever come to fruition?
Re: [oberheim] OB-Xa LED error code at boot time?
2014-10-03 by Bob Grieb
I helped a friend fix his Xa. We found a bad 2114 RAM chip, and also a chip on the lower board that was shorting one of the data bus pinsto gnd, and
Re: [oberheim] OB-Xa LED error code at boot time?
2014-10-03 by synthparts@...
The OB-Xa doesn t have any error reporting ability other than blinking the voices which can t tune during the auto-tune routine. Possibly bad CMOS, ROMs, RAM,
Re: [oberheim] OB-Xa LED error code at boot time?
2014-10-01 by Florian Anwander
Thanks for the reply. We know these topics (I renovated a Xa completely once). The powersupply has been already remade two years ago and as far as I know he
Re: [oberheim] OB-Xa LED error code at boot time?
2014-10-01 by 65 Lotus
I don t know of any error codes, sounds to me like it s just hung during the boot sequence. Step one is to check the power supply voltages. The rectifier in
OB-Xa LED error code at boot time?
2014-10-01 by Florian Anwander
Hello, A buddy of mine has an OB-Xa (quite late version I think Rev6 or 7), which does not boot. It hangs in the boot sequence before doing the voice test and
M-1000: Death of a Curtis Chip
2014-09-23 by jan@...
I own a Matrix-1000. Only recently, I noted that one voice only seems to have only one oscillator running. Ran test program, identified the faulty voice, moved
Re: Better quality Matrix 6 service manual file download problem
2014-09-16 by atoni@...
http://www.cem3374.com/docs/Manuals/Oberheim/Matrix6_SM.pdf http://www.cem3374.com/docs/Manuals/Oberheim/Matrix6_SM.pdf
Re: Better quality Matrix 6 service manual file download problem
2014-09-16 by grenert@...
Argh, still unable to download the file from that folder (site unavailable). Boy, Yahoo Groups really stinks...
Re: [oberheim] Better quality Matrix 6 service manual file download problem
2014-09-15 by Daniel Forró
Thanks a lot, Martin, got it. Daniel Forro On 15 Sep, 2014, at 9:28 PM, Martin Ator cyllall@yahoo.com [oberheim]
Re: [oberheim] Better quality Matrix 6 service manual file download problem
2014-09-15 by Martin Ator
I ve re-done all that again in case there was any problems
Re: [oberheim] Better quality Matrix 6 service manual file download problem
2014-09-15 by Daniel Forró
There is some problem with that folder. It s not possible to open it as the other folders, when trying to open it it starts to write this strange folder name
Re: [oberheim] Better quality Matrix 6 service manual file download problem
2014-09-15 by Daniel Forró
I m not sure about message attachment, but maybe it s possible to upload bigger files directly to file section? Daniel Forro On 15 Sep, 2014, at 5:15 PM,
Re: [oberheim] Better quality Matrix 6 service manual file download problem
2014-09-15 by Martin Ator
Hi, I don t know if it s even the right file but I have re-uploaded what I have. It seems that yahoo groups allow attachments larger than 5mb now? I had to
Better quality Matrix 6 service manual file download problem
2014-09-14 by grenert@...
In the files section, there is folder under Matrix Docs which contains a couple of .zip files for a better quality scan of the Matrix 6 service manual,
RE: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-09-11 by jan@...
Gligli is absolutely right. I ve figured it out now, sorry for posting first and thinking later. Took me some time, my 8-bit coding times are long past, and
RE: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-09-11 by chriswareham@chriswareham.demon.co.uk
Hi Jan, The ANDA instruction will perform a logical and of the contents of register A with the immediate value argument. Register A being the eight most
Re: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-09-10 by eidorian@...
I haven t been following this thread but when I was an assembly programmer (back in the day) ANDA#$80 would zero out all bits other than bit 7. i.e. binary
Re: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-09-10 by charlie midi gfa
from what i know this will strip the high bits off leaving only values 127 or less its been a while chaz ... From: jan@eggers-elektronik.de [oberheim]
Re: [oberheim] Re: Oberheim Perf/X fried with AC adapter
2014-08-26 by Narfman96 - Narfland Studio
Nat, I just sent you an email. I can usually find parts for the 80 s gear. I also have a lot of parts here for these vintage units. It s amazing what is
Re: Oberheim Perf/X fried with AC adapter
2014-08-26 by nat.fowler@...
Fran, I indeed have the extra memory chips installed. I m unfortunately in Germany so not as practical to send them back and forth. Id like to try to fix them
Re: [oberheim] Oberheim Perf/X fried with AC adapter
2014-08-26 by Narfman96 - Narfland Studio
Hi Nat, The power comes in from the AC adapter socket and feeds L4 for the ground side and L3 for the +9 volts when the switch is on. L3 and L4 are inductors
Re: Oberheim Perf/X fried with AC adapter
2014-08-26 by nat.fowler@...
I have googled but all I found was the fix for the problem regarding using the wrong polarity of DC. I didn t see anything about the EPROM though. Is that the
Re: [oberheim] Oberheim Perf/X fried with AC adapter
2014-08-26 by Nick Zampiello
have you googled? this is a common problem with these and i think it fries the eprom. i had an old jl cooper midi box that would do the same thing. NEW
Oberheim Perf/X fried with AC adapter
2014-08-26 by nat.fowler@...
Hopefully someone can help me! I m afraid that in haste in the partial darkness (I ll save the reasons, but I was in hurry and not thinking), I plugged an AC
R: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-25 by F.Manduca
Ahhhh, You are really spoiling us, pal..... :-) ... Mer 20/8/14, gligli.ml@free.fr [oberheim] ha scritto: Oggetto: [oberheim] Re:
New to group
2014-08-21 by alessio.sapora@...
Hello, I just joined this group, owning a Marion ProSynth and hoping to find more information. I have uploaded my own findings on how to build a replacement
New file uploaded to oberheim
2014-08-21 by oberheim@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the oberheim group. File : /Marion
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-20 by lists@...
re: Six Trak. Yeah, it s a challenging task. So far it boots and remains stable, but the I/O addressing must be different because the button scanner gives
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-20 by gligli.ml@...
Hello, I made some more progress!First I wrote a basic M1000 emulator to ease further programming/hacking, see:
Re: [oberheim] Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-19 by Killian Darkwater
Holy cow, the father of the amazing p600fw has taken up the m1000 challenge. I m beyond excited to see this go forward!! On Aug 15, 2014 2:35 PM,
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-19 by jan@...
Incidentally, if anybody else wants to have a look at the M1000 code - or add his or her knowledge to the disassembly - I ve started a small project collecting
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-19 by jan@...
Any luck rewriting the occasional multiply routine with the new 6309 instructions? ;) And does turbo mode mean you are switching to the faster CPU clock? This
Re: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-19 by studio_1a@...
Yes I am also very interested in these mods, I also own both the M1000 and M6R Keep up the good work!
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-18 by lists@...
Great stuff. This is super coincidental actually. I ve been looking into modding the M1000 for a bit but realized it was a bit out of my league to do from
Re: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-18 by Neil Hester
Yes please keep us updated on how things go, I m very interested in performing these mods when they are ready for the public and also interested if it gets
R: [oberheim] Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-18 by F.Manduca
Well, what to say about it? It s still a joy for the heart to see that these old machines reveal this hidden potential, and also to see good will people that
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-15 by gligli.ml@...
Yes, I run it in native mode. Timing isn t a problem as everything time-based is clocked by the timer IRQ, and the 10-15% speed increase is always good to
Re: Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-15 by lists@...
Interesting. The 6309 idea was one I had a while back but I never got my hands on a M100 to test it. Are you running the 6309 in emulation or native mode?
Faster CPU & firmware mod for the Oberheim Matrix 1000
2014-08-15 by gligli.ml@...
Hello, I m working on a CPU / firmware mod for the Matrix 1000, I talk about it there:
Re: [oberheim] Matrix 6 eprom type?
2014-08-15 by Bob Grieb
My Matrix 6R has a 27256 in it. So it s an NMOS EPROM, not a CMOS part like the 27C256. But that should also work fine. Probably at the time, the CMOS
Matrix 6 eprom type?
2014-08-15 by jerry@...
Can anyone tell me the type of eprom in the Matrix 6? 27C256?
Re: OBX Eprom image
2014-08-12 by belinda71@...
I make the change (cut and jumpers) and I try this ROM image. I would tell you the result.Thanks.Belinda
Re: OBX Eprom image
2014-08-12 by synthparts@...
Hi, my friend Cary and I did that OB-X ROM hack page. Not sure why it s no longer working. Anyway what it basically said was to cut the +12V and -5V power
Re: [oberheim] OBX Eprom image
2014-08-10 by belinda71@...
Perfect.Thanks. Best regards. Belinda KATE
Re: very small Matrix6 firmware bug
2014-08-09 by jan@...
Bob, would you be willing to share your insights on disassembling the M6/M1000 code? I m still planning to take a closer look at the code and what it does, and
very small Matrix6 firmware bug
2014-08-09 by Bob Grieb
Hi. I discovered a small bug in the Matrix 6/6R firmware recently. I found a place in the code that has a table of jump addresses based on the