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Re: [N8VEM-S100:676] CP/M-68 on the ECB mini-M68k CPU board

Perhaps the low bit density from that era is a saving grace.

On 01/17/2012 03:59 PM, Neil Breeden wrote:

Same here, I have a number of 8-inch floppies (>40) with various stuff on them, CP/M 1.4, 2.0, games Etc. They are all SSSD – I bought a fair number of “used” 8-inch floppies from eBay – they had been used once for a backup in the early 80s then never touched since. I have only had one disk fail, it refused to format and quickly started going “shhhhhh…shhhhhhhhh…shhhhhhhhhhh” when spinning. I assume something got caught in the sleeve so I trashed it. The floppies have continued to work for me for. When I wrote the “driver” for CP/M 1.4 for my IAudio Video Card I used Teraterm to connect to the system, all compiling and testing was done on 8-inch floppies, it worked great and was very much like how it was done back in the day.



From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Monahan
Sent: Tuesday, January 17, 2012 3:11 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:675] CP/M-68 on the ECB mini-M68k CPU board


Guy’s FWIW, the data on 8” SD disks is not as labile as you might think. I have about 100 of them here from late 70’s to early 80’s.  With only one exception (and that was a 1K DD disk) I have read about 30 with no problem (using a Versafloppy II or our ZFDC board).    They were stored in the 8” plastic sealed boxes in a cool dry place but nothing special. 





John Monahan Ph.D



From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Coffman
Sent: Tuesday, January 17, 2012 1:51 PM
To: n8vem...@googlegroups.com
Subject: Re: [N8VEM-S100:673] CP/M-68 on the ECB mini-M68k CPU board


I'm impressed if you have 8" disk drives that still work.  Somehow, somehow, I hope you can recover the data on those source disks.  BTW:  I am cross-compiling with GCC.  I hate the GAS syntax for assembly code, but the GCC-generated code is second to none.

I have not posted source code or listings yet, as there are still a few pieces needed to make a palatable distro.  I am keeping Mike Sharkey up to date with the source backups; and I would be glad to send the zip files to you for the asking.


On Tue, Jan 17, 2012 at 9:18 AM, Jack Rubin <jack....@ameritech.net> wrote:

John (and other 68K fans),

I've located a bunch of old CP/M-68K stuff recently, including CP/M-68K v 1.3,
FORTH and 68K tiny BASIC. Is there a central listing of the software you already
have? Almost everything is on 8" disk which I should be able to read but I don't
have a system set up currently.

Hopefully, moving to the S100 68K board should be pretty easy from here.

Great work!


----- Original Message ----
> From: John Coffman <john...@gmail.com>
> To: N8VEM <n8...@googlegroups.com>; n8vem...@googlegroups.com
> Sent: Tue, January 17, 2012 10:38:50 AM
> Subject: [N8VEM-S100:670] CP/M-68 on the ECB mini-M68k CPU board
> Motorola 68000 enthusiasts:
> CP/M-68 is working well on the ECB mini-M68k  CPU board, supported by the
>MF/PIC board for serial I/O and IDE interface  (8255).  The attached screen
>     F:  the  ROMdisk, with just a couple of utilities
>     B:  the RAMdisk,  1Mb.  I'm glad I put 2Mb of SRAM on the CPU board.  Half
>is for CP/M,  and the other half is its RAMdisk.
>     C:  an 8Mb CP/M  partition on a CF card.  The photo shows a different,
>smaller CF  card.
> This CP/M supports up to 16 drives -- as soon as I hook the disk
>initialization to the CF card partition table.
> Although this is CP/M 1.2,  the binary utilities are from an extensive
>collection from Douglas.  The  release notes indicate that 1.3 was mostly bug
>fixes to utility  programs.
> The boot process still needs streamlining, and a utility for  setting up the
>partitions on IDE disks (i.e., CF cards) needs to be  written.
> What is running now really has the feel of  CP/M.
> --John