[Intel-devsys] irmx-80 diskettes

Jack Mcmullen forjack842 at aol.com
Fri Aug 16 15:21:43 MDT 2019

Available are my USB and IMAGER/CREATER tools you can make an image of the DD disks via a SBC202. or copy the DD/SD files only to a PC readable stickJack

-----Original Message-----
From: Bill Beech (NJ7P) <nj7p at nj7p.info>
To: Herb Johnson <hjohnson at retrotechnology.com>
Cc: Discussion list for Intel development systems <intel-devsys at lists.brouhaha.com>
Sent: Fri, Aug 16, 2019 11:28 am
Subject: Re: [Intel-devsys] irmx-80 diskettes


On 8/15/2019 4:19 PM, Herb Johnson wrote:
> Thanks Bill, this is very comprehensive. A few comments.
> You might do the easy thing first: read off the single-density disks. 
> YOu could do that in CP/M on a CP/M box, or with Dunfield's imagedsk 
> on an MS-DOS box. In any event you can verify the disk scheme.
Ah, but how do I connect an 8-inch disk to a DOS box.  I have done it in 
the past and may need to do it again.  I have one DSDD 8-inch drive and 
power supply that I could patch together to interface with the the 
AH-1520 FDC that works with the Dunfield imagedsk.  May need to use an 
SCSI HD on that controller.  We will see.
> DD M2FM is harder. But you might ask Mark Ogden about it. (now this 
> conversation is in the Intel-dev list, Mark can speak for himself.)

Jump in there, Mark.  My idea would be to write a program to transmit an 
Intel hex file for each track to the PC.

> He's created a lot of files from Intel disk sources. He's rewritten 
> Dunfield tools to run under Windows. He may have a tool to run under 
> ISIS, or be willing to write one.
>  https://github.com/ogdenpm/disktools/tree/master/unidsk
I will check these out.
> Unpacks an isis .imd or .img file into the individual files.
> There is an old CP/M program to read ISIS diskettes, look in the 
> CPMUG. I retrieved it decades ago to read DEC RT-11 diskettes. (And I 
> did tonight, it's in CPMUG #1. I'll zip it up and send it to Bill.)
> No hurry on this, Bill of course, you have a full plate.
So many projects, so little time!
> Regards,
> Herb
> On 8/15/2019 5:38 PM, Bill Beech (NJ7P) wrote:
>> Herb,
>> Indeed I have 5 each 8-inch disks here for RMX/80.
>> They are:
>> 9500013-03 Ver 1.3, RMX/80 Real-time Multitasking executive for iSBC 
>> 80/20 and 80/20-4, SD.
>> 9500018-03 Ver 1.3, RMX/80 Real-time Multitasking executive for iSBC 
>> 80/10, SD.
>> 9700016-03, Ver 1.3, RMX/80 Real-time Multitasking executive for iSBC 
>> 80/20 and 80/20-4, DD.
>> 9700020-03, Ver 1.3, RMX/80 Extensions for iSBC 80/10, iSBC 80/20, 
>> 80/20-4, and 80/30, DD.
>> 9700021-03, Ver 1.3, RMX/80 Real-time Multitasking executive for iSBC 
>> 80/10, DD.
>> The SD disks should not be hard to copy.  The DD may be trickier.  I 
>> suspect they are in 3740 format SD but M2FM format DD.  I suspect I 
>> will need to write a program for the MDS II to create an image file 
>> on the PC.  I need to think about it some more, once I get the other 
>> board for Jon H. done and both tested. And I need to get some 
>> simulators to compile again and run, at least as far as the monitors 
>> are concerned.  I also need to get versions of CP/M-80 to run on the 
>> OEM simulators.  I also have several books I have collected to scan. 
>> So my queue is pretty full!
>> Bill
>> On 8/15/2019 9:34 AM, Herb Johnson wrote:
>>> Biil, someone asked me about 8-inch diskettes with iRMX-80 on them. 
>>> Of course I don't have them. So I started looking around for this. 
>>> This doesn't seem to be available "on the Web" or among the 
>>> intel-dev archives.
>>> I searched your Intel Google Drive and then the archive of our 
>>> Intel-dev discussion, for mention of iRMX-80. The only significant 
>>> mention is your Sept 2018 purchase of five iRMX-80 diskettes from 
>>> eBay. I didn't find subsequent email traffic on your results with 
>>> those diskettes. And I don't see any iRMX80 disk images in any of 
>>> the by-person folders in your Google drive. I checked Mark Ogden's 
>>> gethub; no iRMX80 stuff there. One other reference but it seems a 
>>> dead end. I'll detail it as a PS.
>>> Bill, it is still a good "find" to have disks with iRMX-80. Thanks 
>>> for spending the $$$ to get them. I know doing work is tough for 
>>> you; there's no priority for this just because somebody asked me 
>>> about it. But what's the status of those physical diskettes, and 
>>> were you able to image them in some fashion?
>>> Regards, Herb
>>> PS: Jon Hales did something with a bunch of Intel diskette 
>>> label-descriptions posted around Aug 2018. Mark Ogden commented 
>>> about the list, and mentioned this:
>>> 950017.06 looks like irmx80 v2.4
>>> I have no idea what Jon was doing. But I could not find a disk-image 
>>> with that 950017.06 designation.
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