Z-80 Cromix source code?

[Andrew Valencia]

Hey, during the great shutdown of Cromemco did the source code to
Cromix ever make it out into the wild? My personal interest is WRT
the Z-80 version, as that's the kind of HW I could afford at the time!

Thanks,
Andy Valencia

[Marcus Bennett]

Andy,

I have a few isolated snippets of source code of some of the utilities written in C code.  Then as you know there were the Driver Packages to allow you to write Z80 code to interface to the IO processor and also large > 100MB disk drives.

If anybody has the Z80 or 680x0 sources then please declare it now, but I fear all is lost.  (Check my catalog file around disk 862 for what I have)

Time to mention Egon Zakrajsek who is named in the Sources I have, check him on Wikipedia


Whilst the 68000 versions of Cromix were certainly more capable the Z80 one was perhaps IMHO the "kick ass" product.  At the time, nobody thought it was the least bit possible to run a UNIX like Operating System on such a rudimentary processor and Cromemco showed them all to be wrong. 

Regards marcus b.

[Nigel Williams]

On Wed, Aug 3, 2011 at 7:02 AM, Marcus Bennett <amo...@gmail.com> wrote:

Whilst the 68000 versions of Cromix were certainly more capable the Z80 one was perhaps IMHO the "kick ass" product.  At the time, nobody thought it was the least bit possible to run a UNIX like Operating System on such a rudimentary processor and Cromemco showed them all to be wrong.

That is what excites me about Cromix on a Z80, the multi-user aspect. There are some interesting examples of timesharing systems, like the PDP-8/E etc which could run a surprising number of users via the Edusystem package in small amounts of memory and limited system resources, http://vt100.net/manx/details/1,3954

Once I have a 256KZ I will be all set :-)


www.retroComputingTasmania.com

[MikeS]

----- Original Message -----
From: Nigel Williams
To: crom...@googlegroups.com
Sent: Wednesday, August 03, 2011 2:49 AM
Subject: Re: Z-80 Cromix source code?

<snip>

> Once I have a 256KZ I will be all set :-)

Is that directed at me by any chance? ;-)

OK, now that the mail strike is over I have absolutely no excuse; next week
at the latest!

I'll PM you to see if there's anything else you need. Thanks for your
patience!

mike

[MikeS]

Hello Marcus:

 

I'm surprised you didn't comment on Michael Peterson's request for a CDOS boot disk and a disk from XPU Cro+172; I take it that you don't have an XPU 172, but aren't at least some of your CDOS IMD images complete and bootable?

 

And is there a way to tell whether the images are 5.25DD or 8" (without D/Ling) ?

 

mike

[Nigel Williams]

On Thu, Aug 4, 2011 at 1:46 AM, MikeS <dm...@torfree.net> wrote:

----- Original Message ----- From: Nigel Williams
To: crom...@googlegroups.com
Sent: Wednesday, August 03, 2011 2:49 AM
Subject: Re: Z-80 Cromix source code?

<snip>

Once I have a 256KZ I will be all set :-)

Is that directed at me by any chance? ;-)

Yes sorry for the blunt-stick, I couldn't think of something cleverer or more subtle, thanks for being so good about it.

cheers,
nigel.

[Michael Leon Peterson]

 

All,

 

I purchased at ZPU on eBay but it is beginning to look like it is not a working one.  I have Marcus sending out a CDOS bootable 5.25 but I will not be able to boot after all since this is not working.  I thought it could have been the 64FDX not being able to work with the ZPU, but everything I researched it should be able to work.  It works with a XXU but that of course uses the XDOS and does not use the RDOS.  I do get a green light on the 64FDX before the XXU takes over, so I think the RDOS is working ok.

 

Is the any interest in any of this group that might be able to sell a ZPU or DPU if you have an extra or were to get one?

 

This is ZPU is a rev F mod level 1 with no socks, only for Z-80 chip, so very hard to diagnose the issue.  It appears to be in very good shape, so something must have really gone wrong with it.

 

Thanks,

 

Michael

 

[MikeS]

How do you know it's not working? What are the symptoms? What kind of memory are you using and how is it configured?

 

You didn't reply to my earlier question:  can you not create disks from images, and what kind of drives do you have on the 120?

 

5.25DD ?

5.25HD (as 8") ?

3.5HD (as 8") ?

8" ?

 

I have some ZPUs and DPUs if yours really is bad.

 

mike

----- Original Message -----

From: Michael Leon Peterson

To: crom...@googlegroups.com

Sent: Monday, August 08, 2011 3:32 PM

Subject: Re: Z-80 Cromix source code?

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[Michael Leon Peterson]

I replaced the Z-80 and that fixed it so the ZPU is working fine now.

 

I have (2) 2048KZ, and modified (2) 256KZ that is a 1024KZ.  I run the (2) 2048KZ in on CS120 and (2) 1024KZ in the other.  The 256KZ was modified by a company called Quinn Teams which use to be in Southern California.

 

I have 5.25 360K DS DD and a 1.2K 8 in TM848-02, do not have the ability to do the 5.25/3.5HD (as 8”) I have read the info on how to, but decided I did not want to go down that path since I already had what I have.

 

About the DPU I would be interested but it would have to work with my ESDI, and I know there was some modifications required to make that happen and not sure those parts would be available any longer, so it would have to be an upgraded DPU to work with that. but would like to try.

 

I was a Cromemco dealer in Southern California from 1980 – 1990, until 2 yrs after Harry and Roger had sold Cromemco to Dynatech Computer Systems, I than closed my doors, I continued to support my customers until May 1 1993.

 

My last SUDS was getting Cromix-Plus for 68000/68010 172 and 86020 172, but my 68000/68010 has a bad Disk 6 which means I lost crolib.o68 and sysdef.bin.  My 68020 172 is fine, I ran that on my CS120’s for 3 years until I shut them down in May 1993.  I just recently brought them back up but had to replace the XT-4380 in both and the Archive 2150, they had both decided to die.  My CS120s have a 150 meg Archive cartridge tape drive instead of the 5.25 floppy, so the floppy is external.  I think they called these CS115 but they did not have a 64FDX any longer in the box, you could boot from the tape drive, but I never had the software in the config since it requires a Cromix which is saved in Xfs format.

 

Michael

[MikeS]

----- Original Message -----
From: Michael Leon Peterson
To: crom...@googlegroups.com
Sent: Monday, August 08, 2011 6:10 PM
Subject: Re: Z-80 Cromix source code?

> I replaced the Z-80 and that fixed it so the ZPU is working fine now.

 

Excellent!

> I have (2) 2048KZ, and modified (2) 256KZ that is a 1024KZ.  I run the (2) 2048KZ in on CS120 and (2) 1024KZ in the other.  The 256KZ was modified by a company called Quinn Teams which use to be in Southern California.

 

I've got a couple of Quinn's 256/1024KZs as well (among various other KZ and MSU sizes) and I recently gave away one of his "Top Hat"s, which was a dual 8" floppy package that sat on top of a Z-2 chassis. I wonder if Richard's still around and what he's doing these days; he was definitely one of THE Cromemco gurus of the day, and a regular contributor to IO News.

 

There was at least one other outfit doing 256>1024KZ conversions and I think I still have the instructions for it somewhere from when we were thinking of doing it ourselves.

> I have 5.25 360K DS DD and a 1.2K 8 in TM848-02, do not have the ability to do the 5.25/3.5HD (as 8”) I have read the info on how to, but decided I did not want to go down that path since I already had what I have.

 

The beauty of HD drives is that by adding one jumper they just plug into the 5.25" FDC cable/port and give you a relatively reliable means of transferring 1.2MB of files and 8" images between the Cromemco and a PC.

 

On the other hand if you're running Cro+ then of course there's the CScopy package that lets the Cromemco natively use MS-DOS formatted 360KB disks.

> About the DPU I would be interested but it would have to work with my ESDI, and I know there was some modifications required to make that happen and not sure those parts would be available any longer, so it would have to be an upgraded DPU to work with that. but would like to try.

 

I have no idea either, and don't have an ESDI controller/drive to test it on.

> I was a Cromemco dealer in Southern California from 1980 – 1990, until 2 yrs after Harry and Roger had sold Cromemco to Dynatech Computer Systems, I than closed my doors, I continued to support my customers until May 1 1993.

 

I was a small dealer up here from 1982 through the mid '90s and the Dynatech acquisition (and subsequent slide into oblivion), although my last client's Cromemco was not retired until 1999 !!!

> My last SUDS was getting Cromix-Plus for 68000/68010 172 and 86020 172, but my 68000/68010 has a bad Disk 6 which means I lost crolib.o68 and sysdef.bin. 

 

I think my latest is 168 but I haven't been able to find my disks; if I do happen to run across a DPU/XPU version of 172 I'll certainly let you know. I wouldn't think there'd be much difference though.

 

> My 68020 172 is fine, I ran that on my CS120’s for 3 years until I shut them down in May 1993.  I just recently brought them back up but had to replace the XT-4380 in both and the Archive 2150, they had both decided to die.  My CS120s have a 150 meg Archive cartridge tape drive instead of the 5.25 floppy, so the floppy is external.  I think they called these CS115 but they did not have a 64FDX any longer in the box, you could boot from the tape drive, but I never had the software in the config since it requires a Cromix which is saved in Xfs format.

 

Surprised the Maxtors died; sometimes those old drives just had a problem with the head sticking to the platters or the head assembly sticking to the park bumper, and could be brought back to life. Regrettably I scrapped all my CS1xx's and gave away my Z-2's; still have some CS-1(H)'s, a late model System 3, and a couple of 300 and 400/420 boxes rusting away...

 

m

 

 

[Keith]

I noticed a old(3 weeks ago) ebay seller had Cromemco 68020 Cromix-
Plus (172) disk set that didn't sell. He was asking $100.00 for a COPY
of the 10 5-1/4 disks which he made.

This software requires a minimum of the following Cromemco boards to
load and run

XXU 68020 CPU
1024KZ Memory
ESDC or STDC
64FDX
There are 10 diskettes, 2 are bootable, 8 FTAR copies of Cromix and
utilities
The 2 bootable contain the programs to inithard and create file
systems and the inital minimum copy of Cromix to be copied to the hard
disk
The FTAR disks, 7 contain the full Cromix software version, 1 contains
a Cromix copy of KERMIT Communications Software.
Release 10 (version 172) of the Cromix-Plus Operating System for the
XXU is functionally identical to version 167 except for:

[Michael Leon Peterson]

Mike,

 

thanks for response,

So you have old 400/420 rusting away, interested in selling at all?  If you have a extra DPU would also be interested/

 

Michael

[MikeS]

Hi Keith; long time no chat, good to know you're still alive & kickin' !

I think Michael has the XXU version and is looking for disk 6 of the XPU
version.

I'm curious: what came after the "except for:" ?

m

> > to do the 5.25/3.5HD (as 8�) I have read the info on how to, but decided

> > I did not want to go down that path since I already had what I have.
>
> The beauty of HD drives is that by adding one jumper they just plug into
> the 5.25" FDC cable/port and give you a relatively reliable means of
> transferring 1.2MB of files and 8" images between the Cromemco and a PC.
>
> On the other hand if you're running Cro+ then of course there's the CScopy
> package that lets the Cromemco natively use MS-DOS formatted 360KB disks.
>
> > About the DPU I would be interested but it would have to work with my
> > ESDI, and I know there was some modifications required to make that
> > happen and not sure those parts would be available any longer, so it
> > would have to be an upgraded DPU to work with that. but would like to
> > try.
>
> I have no idea either, and don't have an ESDI controller/drive to test it
> on.
>

> > I was a Cromemco dealer in Southern California from 1980 � 1990, until 2

> > yrs after Harry and Roger had sold Cromemco to Dynatech Computer
> > Systems, I than closed my doors, I continued to support my customers
> > until May 1 1993.
>
> I was a small dealer up here from 1982 through the mid '90s and the
> Dynatech acquisition (and subsequent slide into oblivion), although my
> last client's Cromemco was not retired until 1999 !!!
>
> > My last SUDS was getting Cromix-Plus for 68000/68010 172 and 86020 172,
> > but my 68000/68010 has a bad Disk 6 which means I lost crolib.o68 and
> > sysdef.bin.
>
> I think my latest is 168 but I haven't been able to find my disks; if I do
> happen to run across a DPU/XPU version of 172 I'll certainly let you know.
> I wouldn't think there'd be much difference though.
>

> > My 68020 172 is fine, I ran that on my CS120�s for 3 years until I shut

> > them down in May 1993. I just recently brought them back up but had to
> > replace the XT-4380 in both and the Archive 2150, they had both decided
> > to die. My CS120s have a 150 meg Archive cartridge tape drive instead of
> > the 5.25 floppy, so the floppy is external. I think they called these
> > CS115 but they did not have a 64FDX any longer in the box, you could
> > boot from the tape drive, but I never had the software in the config
> > since it requires a Cromix which is saved in Xfs format.
>
> Surprised the Maxtors died; sometimes those old drives just had a problem
> with the head sticking to the platters or the head assembly sticking to
> the park bumper, and could be brought back to life. Regrettably I scrapped
> all my CS1xx's and gave away my Z-2's; still have some CS-1(H)'s, a late
> model System 3, and a couple of 300 and 400/420 boxes rusting away...
>
> m

--

[Keith]

I'm still here like most people lurking still
It's nice to see people here still offering to help others with these
old guys.
What do you guys do up in Canada without snow? PM me as I still have
two cromemco's and my old imsai running smoke free.


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190560193877&ssPageName=STRK:MEWAX:IT
Is the complete URL i left off. Sorry.

This is Cromemco 68020 Cromix-Plus (172) that was released April 19,
1990 which was the last release of this software by Cromemco

This software requires a minimum of the following Cromemco boards to
load and run

XXU 68020 CPU

1024KZ Memory

ESDC or STDC

64FDX

There are 10 diskettes, 2 are bootable, 8 FTAR copies of Cromix and
utilities

The 2 bootable contain the programs to inithard and create file
systems and the inital minimum copy of Cromix to be copied to the hard
disk

The FTAR disks, 7 contain the full Cromix software version, 1 contains
a Cromix copy of KERMIT Communications Software.

Release 10 (version 172) of the Cromix-Plus Operating System for the
XXU is functionally identical to version 167 except for:

1.
Lock system call can be aborted while waiting for lock

2.
ESDC driver and ESDC firmware have been updated for the 760 Mbyte
drives

3.
SCSI tape driver works with all versions of SCSI tape drives

4.
The ls command can now handle extremly long file name

5.
The root command scans all of the /dev directory for the root device

6.
Soft error count on ESDI disks is handled correctly

7.
Multipe volumes on Floppy tape work correctly (Ftar)

These diskettes are new copies of the orginals, the orignals are now
not readable, they are over 21 years old.

These diskettes can only be read using a 360K floppy drive connected
to a system running the previously mentioned set of Cromemco boards.

[MikeS]

----- Original Message -----
From: Michael Leon Peterson
To: crom...@googlegroups.com
Sent: Friday, August 12, 2011 4:47 PM
Subject: Re: Z-80 Cromix source code?

> Mike,

> thanks for response,
> So you have old 400/420 rusting away, interested in selling at all?  If you have a extra DPU would also be interested/

> Michael

 

 

Shipping's usually a killer on these bigger boxes, especially from Canada; found new homes locally for the Z-2s & HDD, but unfortunately it usually makes more sense to scrap the chassis and occasionally sell one of the cards or drives for a few bucks...

 

I don't know if one can embed pictures here, but let's try; here are the 420s and a 300 (sans its TM848 drive) in case someone hasn't seen one before:

 

 

The 300s were updated versions of the late model System 3 (as opposed to the early dual-Persci version), with a single 8" floppy and full-height hard disk (the 100s were upgraded System 1/CS-1's looking like a half-size 300, and the 200's were upgraded versions of the Z-2/CS-2 'black boxes'), all with Motorola 68000/010/020 CPUs, Cromix+ and optional UNIX V.

 

The 400s like these 420s had a 5.25" floppy, DC600 tape drive (the older floppy-controller version) and two full-height hard disks (second one optional).

 

Let's see if the picture makes it; I'll reply privately re the DPU.

 

m

[Nigel Williams]

I see the picture of the 300s/420 fine, I've never seen these before. If someone takes these over please do a photo-gallery walk-around+internals if possible.

[MikeS]

----- Original Message -----

From: "Keith" <khar...@gmail.com>

To: "Cromemco" <crom...@googlegroups.com>

Sent: Friday, August 12, 2011 6:23 PM

Subject: Re: Z-80 Cromix source code?

> I'm still here like most people lurking still

 

Like I said, nice to see you're still here; ya never know...

> It's nice to see people here still offering to help others with these old guys.

 

Also nice to hear from and meet some new virtual faces.

 

> What do you guys do up in Canada without snow?

 

We sweat (and the women perspire) just like you guys ;-)

 

What's that tasteless old joke... Women don't sweat, they don't burp and they don't fart; if they didn't bitch they'd explode...

 

> PM me as I still have two cromemco's and my old imsai running smoke free.

 

Good to hear it; what OS are you running these days on the Cromemcos?

 

Haven't fired mine up for a while, but this weekend for sure; have to finally get around to testing some cards that certain people have been waiting for for some considerable time now, mea culpa.

 

Sounds like there is enough difference between 167/168 and 172 that subbing the 168 version for Michael's bad disk6 might not work; might be worth while to try to recover it though.

 

mike

 

***********************

[MikeS]

I should probably also scan some of the later brochures as well (I even have German and Russian versions ;-) ) Doesn't seem to be much of the later literature around.

 

Hmm, I see here that they had a special on those CS-420s in the summer of '87: $6000 off the regular price of $37,385.00 !!! Hope we took advantage of that ;-)

 

Looks like the 8" 300s were finally discontinued in late '86.

 

Boy, that's > $100,000 sitting out there on my porch...

 

m

----- Original Message -----

From: Nigel Williams

To: crom...@googlegroups.com

Sent: Friday, August 12, 2011 6:40 PM

Subject: Re: Z-80 Cromix source code?

I see the picture of the 300s/420 fine, I've never seen these before. If someone takes these over please do a photo-gallery walk-around+internals if possible.

[jima]

On Friday, August 12, 2011 7:10:27 PM UTC+1, MikeS wrote:

----- Original Message -----
From: Michael Leon Peterson
To: crom...@googlegroups.com
Sent: Monday, August 08, 2011 6:10 PM
Subject: Re: Z-80 Cromix source code?

snip!

 

There was at least one other outfit doing 256>1024KZ conversions and I think I still have the instructions for it somewhere from when we were thinking of doing it ourselves.

 

snip!

Any chance you still have those instructions? My converted 256KZ has died on me.

 

Jim

 

 

[MikeS]

Hi Jim,

 

Any idea who did the upgrade? I *think* the docs I have are for the upgrade done by Excalibur and not really 'instructions' per se, but a reverse-engineered schematic; might take me a while to find 'em though..

 

I do have a couple of cards that were done by Quinn that I could look at if that would help. Any chance of some pictures of yours showing the broken wires?

 

mike

----- Original Message -----

From: jima

To: crom...@googlegroups.com

Sent: Thursday, January 05, 2012 12:04 PM

Subject: Re: Z-80 Cromix source code?

On Friday, August 12, 2011 7:10:27 PM UTC+1, MikeS wrote:

----- Original Message -----
From: Michael Leon Peterson
To: crom...@googlegroups.com
Sent: Monday, August 08, 2011 6:10 PM
Subject: Re: Z-80 Cromix source code?

snip!

 

There was at least one other outfit doing 256>1024KZ conversions and I think I still have the instructions for it somewhere from when we were thinking of doing it ourselves.

 

snip!

Any chance you still have those instructions? My converted 256KZ has died on me.

 

Jim

 

 

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[Michael Leon Peterson]

Jim,

 

Here is a pdf copy hope you can read ok.

 

Michael Peterson

 

From: jima

Sent: Thursday, January 05, 2012 9:04 AM

To: crom...@googlegroups.com

Subject: Re: Z-80 Cromix source code?

 

On Friday, August 12, 2011 7:10:27 PM UTC+1, MikeS wrote:

----- Original Message -----
From: Michael Leon Peterson
To: crom...@googlegroups.com
Sent: Monday, August 08, 2011 6:10 PM
Subject: Re: Z-80 Cromix source code?

snip!

 

There was at least one other outfit doing 256>1024KZ conversions and I think I still have the instructions for it somewhere from when we were thinking of doing it ourselves.

 

snip!

Any chance you still have those instructions? My converted 256KZ has died on me.

 

Jim

 

 

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[jima]

Pretty sure it would have been done by Comart (a Cromemco distributor in the UK) as it came in a CS1 I got from them. Regrettably the chassis, PSU and bus had an accident and didn't survive but I was able to rescue the card set. I can run CDOS just fine with the DPU but my favourite was always Cromix with the 68K. I just saw Michael P's post and I think this is exactly what I need - I'll dig out the chassis tomorrow and check it against the PDF (although the piggy-back 'LS153 and the two jump wires sound very familiar).

Thanks, guys, I'll report progress in due course.

Jim
 

[jima]

Hi Michael, this looks very good to me - many thanks.

Jim

[MikeS]

Great!

 

Thanks, Michael, that'll save me looking for it. Let's hope that Jim indeed has one of Quinn's cards, although the other ones would probably have pretty well the same changes.

 

mike

[Michael Leon Peterson]

All,

 

I got this doc about converting 256Kz to 1024Kz from Quinn when he had his shop in southern California before he moved to Texas.  We were good friends, I had a Cromemco dealership in Orange county California at the time.

 

Michael P

To view this discussion on the web visit https://groups.google.com/d/msg/cromemco/-/DdS8BguB2vUJ.

[jima]

Third time to try to post these - this really is useless software from Gurgle! Definitely seems to be the mod from the piggy-backed '152 and I had forgotten but it looks like I tried to re-attach the jump wires already (right hand two long ones on rear) but without confirmation wasn't going to risk trying it. I'll check against Michael's PDF in the morning.

Thanks to all, more progress than I have had in some time. BTW apologies to the OP for hi-jacking the topic - we are probably well OT now!

Jim

[MikeS]

Well, as they say there's more than one way to skin a cat/upgrade a 256KZ...

 

I have three upgraded 256KZs, two from Quinn and one from (AFAIK) Excalibur, and none looks like yours; the Quinn ones do have the piggybacked IC37 but it's a '153 and the wiring is substantially different, although of course you can usually pick up the same signal in several places. The other one looks a lot simpler, but it also has a sticker saying it doesn't work ;-)

 

Let's hope yours matches Michael's PDF electrically and you can solve your problem that way; if not, I guess we'll have to dig a little deeper...

 

m

----- Original Message -----

From: jima

To: crom...@googlegroups.com

Cc: ja...@attfield.co.uk

Sent: Thursday, January 05, 2012 7:09 PM

Subject: Re: Z-80 Cromix source code?

Third time to try to post these - this really is useless software from Gurgle! Definitely seems to be the mod from the piggy-backed '152 and I had forgotten but it looks like I tried to re-attach the jump wires already (right hand two long ones on rear) but without confirmation wasn't going to risk trying it. I'll check against Michael's PDF in the morning.

Thanks to all, more progress than I have had in some time. BTW apologies to the OP for hi-jacking the topic - we are probably well OT now!

Jim

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[jima]

I think I can see what is happening now. Although the board does match
Michael's in quite a few respects there are some key differences
including the use of an F153 rather than an LS153 (type in my last,
was a '153 not a '152) which is hooked up to A16 and A17 rather than
A18 and A19 which on my board go to the AM2964 controller. After I
found my notes on ML1 and ML2 for the A1 rev board and eliminated
those traces and resistors, that was the clue - this has been modded
according to Cromemco's schematics for a 1024KZ (hence the mandated
'F153). I'm not sure where I go from here - I still can't nail the two
jump wires on the RHS of the board (solder side) but I'm going to map
out the mods again with a clear head and see if I can figure out their
purpose. I have a feeling they are associated with the Z80 bank
switching since they go to the original 'LS157 associated with the
bank decode ROM and latch.

Any clues on how to run diags on a 1024KZ? I don't think I ever had to
do that.

On Jan 6, 1:11 am, "MikeS" <dm...@torfree.net> wrote:
> Well, as they say there's more than one way to skin a cat/upgrade a 256KZ...
>
> I have three upgraded 256KZs, two from Quinn and one from (AFAIK) Excalibur, and none looks like yours; the Quinn ones do have the piggybacked IC37 but it's a '153 and the wiring is substantially different, although of course you can usually pick up the same signal in several places. The other one looks a lot simpler, but it also has a sticker saying it doesn't work ;-)
>
> Let's hope yours matches Michael's PDF electrically and you can solve your problem that way; if not, I guess we'll have to dig a little deeper...
>
> m
>
>
>
>
>
>
>
>   ----- Original Message -----
>   From: jima
>   To: crom...@googlegroups.com
>   Cc: ja...@attfield.co.uk
>   Sent: Thursday, January 05, 2012 7:09 PM
>   Subject: Re: Z-80 Cromix source code?
>
>   Third time to try to post these - this really is useless software from Gurgle! Definitely seems to be the mod from the piggy-backed '152 and I had forgotten but it looks like I tried to re-attach the jump wires already (right hand two long ones on rear) but without confirmation wasn't going to risk trying it. I'll check against Michael's PDF in the morning.
>
>   Thanks to all, more progress than I have had in some time. BTW apologies to the OP for hi-jacking the topic - we are probably well OT now!
>
>   Jim
>
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