M3000 vs M5000

[Boydie]

I'd noticed that too, except I'd dismantled a Music87 instead.
Presumably the extra modifications on the back of the M3000 are what maps it into a different bit of the 1MHz bus, and modding a M500 board will turn it into a M3000?
What are the values of the caps?

ps Congrats on the recovery. Speaking from the other end of the icu bed it's nice to know people do get better (we seldom get to see the final outcome).

[paulv]

The caps in the photo's are ceramic, marked as N22 which makes then 220nF I believe.

Yes, the extra wires are connected to the address decoder circuitry so yes, it would seem that they're used to alter the address that the M3000 will respond to.

Regarding the recovery, it's by no means complete, I need to lose the weight I put on when I had my chemo which will help me out no end. I hired a trike and went cycling in the peak district a few weeks ago which was interesting. I was a keen cyclist before and I can ride a bike mounted on a turbo trainer so a trike seemed like a safer bet than a bike. In the end though it proved to be scary as hell

After my surgery I spent 2 days in a semi-concious state in ITU at Stanmore. All I remember was the fact that I had an ITU nurse sitting with me 24/7 for those two days watching over me for which I'm eternally grateful. They were awesome!

Paul

[hoglet]

The Music 5000 only enables writes when a value in the range &30-&3F is written to the &FCFF paging register. The Music 3000 is identical to the Music 5000, except it uses a different page range (currently unknown).

This "address" that the Music 5000 responds to is controlled by this bit of circuitry:

Specifically, IC35 matches D7=0 and D6=0 and IC14 matches D5=1 and D4=1.

Looking carefully at the two extra wires on Paul's photos, they appear to connect:
- IC32 pin 14 (1MHz Bus D4) -> IC35 pin 10
- IC32 pin 8 (1MHz Bus D7) -> IC14 pin 1

This only makes sense if there are some cut tracks (possibly under the ICs), and if the PCB designer has pin-swapped pins 9/10 of IC35 and pins 1/2 of IC14 (compared to the schematic).

So with these mods, I think IC35 matches D6=0 and D4=0 and IC14 matches D7=1 and D5=1. This would mean a Music 3000 would enable writes when &A0-&AF is written to the &FCFF paging register. A way to confirm this would be to use a multi-meter to check the continuity pins 9/10 of IC35 and pins 1/2 of IC14 and D4..D7 on the 1MHz bus.

Dave

P.S. Paul, the Music 3000 drivers were included in the later system disks. What do the labels on the disks say?

[paulv]

I can buzz out the lines tomorrow evening.

For now, the discs (some originals, some "backups" marked with *) I have are labelled as follows:

Studio 5000 System Disc *
Studio 5000 Issue Disc
Studio 2 Issue Disc
Studio 3 Issue Disc
Studio 5000-4B Issue Disc
AMPLE Toolbox

Music 87 *
Jukebox 500 *
Music 2000 Interface *

Ample Instruments *

Music discs are:

AMPLE Bytes Back
Music City
COSMIX
Inside Stories
Notes

[paulv]

Looking carefully at the two extra wires on Paul's photos, they appear to connect:
- IC32 pin 14 (1MHz Bus D4) -> IC35 pin 10
- IC32 pin 8 (1MHz Bus D7) -> IC14 pin 1

Are you sure about this? My pin counting says:

- IC32 pin 7 (1MHz Bus D4) -> IC35 pin 10
- IC32 pin 13 (1MHz Bus D7) -> IC14 pin 1

Paul

[hoglet]

Are you sure about this? My pin counting says:
- IC32 pin 7 (1MHz Bus D4) -> IC35 pin 10
- IC32 pin 13 (1MHz Bus D7) -> IC14 pin 1

You win I think...

- IC32 pin 7 (1MHz Bus D5) -> IC35 pin 10
- IC32 pin 13 (1MHz Bus D6) -> IC14 pin 1

That would make the address D7=0 D6=1 D5=0 D4=1 i.e. 0x5x

[crj]

Gngh! I need to get my Hybrid Music System up and running again, and hope to get good archives of some of my floppies. (Fortunately, I have multiple copies of the important stuff.)

Back in the day, I almost completely picked AMPLE apart. To the extent of being able to detokenise/disassemble existing AMPLE words whether implemented in AMPLE or machine code. I also wrote a utility to turn a program into a module, and wrote two or three extension modules to do various tricks.

Starting from there - assuming I can get it all going again - it ought to be relatively easy to answer questions such as these.

[paulv]

Well, that pretty much solves it then. The traces buzz out as predicted and I found the track cuts...

You can actually see the track cuts on one of the previous photo's I posted but you could miss them if you're not looking for them specifically



Paul

[paulv]

So, I took my Hybrid discs to the ABug meet in Leicester and left them in the capable hands of our very own DanielJ who has Kryofluxed the discs and converted them all to SSD's too.

Going through the discs, it seems I have a couple of discs with different versions of the M5 module on and one of the discs is billed as the Studio 5000 Release 6 which is the latest one I think I've ever seen.

I can't seem to get the discs to run under B-em correctly and manually attempting to load the M5 from the release 6 disc using Colin Fraser's system disc returns the error "Too Big" and attempting to load some of the other modules like "INT" and "EW" seem to hang B-Em. As my Hybrid System is still in boxes, I'm uploading the archive of discs Daniel has created for me here so others can take a look.

Many thanks to Daniel for doing the archive work

Paul

[hoglet]

This is great!

It looks like Studio3.ssd contains a copy of the extensions to support the Music 3000.

A quick disassembly of M.M5 and search for FCFF found the following:

Code: Select all

09ED  A9 3E       LDA  #&3E       )>
09EF  85 EE       STA  &EE        .n
09F1  8D FF FC    STA  &FCFF     ..|


and

Code: Select all

0A58  A9 5E       LDA  #&5E       )^
0A5A  85 EE       STA  &EE        .n
0A5C  8D FF FC    STA  &FCFF     ..|


This matches up with what we believed were the Music 3000 "addresses", i.e.
- 0x3x for the Music 5000
- 0x5x for the Music 3000 extender

Checking the other disks, this seems to be the only version of M.M5 that uses both addresses.

Great work for finding this.

Dave

[paulv]

It looks like Studio3.ssd contains a copy of the extensions to support the Music 3000.

Checking the other disks, this seems to be the only version of M.M5 that uses both addresses.

Excellent That's great news.

Paul

[Coeus]

I can't seem to get the discs to run under B-em correctly and manually attempting to load the M5 from the release 6 disc using Colin Fraser's system disc returns the error "Too Big" and attempting to load some of the other modules like "INT" and "EW" seem to hang B-Em. As my Hybrid System is still in boxes, I'm uploading the archive of discs Daniel has created for me here so others can take a look.

Paul, I was shocked to hear of your cancer experience and it's great to hear you have recovered enough to have made it to ABUG.

Regarding B-Em crashing, later on the thread Music 5000 in B-Em which you have already contributed to I discover the M4 module would crash due to B-Em not emulating the shift register in the VIA. The m4000 branch of B-Em on the stardot git repository now does emulated that, along with MIDI input via an emualted M400 from Jack on Linux.

Whilst there is still more to do to finish that - I'd like to have it working with Linux ALSA and on Windows - I can see that the next likely thing could be to emulate an M2000. If you have any other problems with Hybrid modules crashing B-Em it's probably worth putting it in as an issue.

[paulv]

Paul, I was shocked to hear of your cancer experience and it's great to hear you have recovered enough to have made it to ABUG.

Thanks. It took two years to get to this point but it was really great to see everyone again.

Regarding B-Em crashing, later on the thread Music 5000 in B-Em which you have already contributed to I discover the M4 module would crash due to B-Em not emulating the shift register in the VIA. The m4000 branch of B-Em on the stardot git repository now does emulated that, along with MIDI input via an emualted M400 from Jack on Linux.

One of these days, I'll have the time to install Linux on an old laptop and see what's changed since Red Hat 3 from 1996

Whilst there is still more to do to finish that - I'd like to have it working with Linux ALSA and on Windows - I can see that the next likely thing could be to emulate an M2000. If you have any other problems with Hybrid modules crashing B-Em it's probably worth putting it in as an issue.

Well, it's Birthday and Christmas season now so all my machines barring my work laptop are put away for the next 3-4 weeks so I won't be doing anything for a while

Paul

[daveejhitchins]

Well, it's Birthday and Christmas season now so all my machines barring my work laptop are put away for the next 3-4 weeks so I won't be doing anything for a while

Oh! . . . This is when I usually get mine out to play with . . . Mmmm! Actually, they never go away

Dave H

[paulv]

Well, it's Birthday and Christmas season now so all my machines barring my work laptop are put away for the next 3-4 weeks so I won't be doing anything for a while

Oh! . . . This is when I usually get mine out to play with . . . Mmmm! Actually, they never go away

Dave H

I know. This is my life at the moment. Extended the house and less space than ever to keep things in... The tree has now taken the space where my computers were living in the dining room... By order of her indoors!

Paul