Looking for Help to make a MP/M Disk Image
Hi, After a lot of effort I repaired a Systems Group 2800 S-100 computer by tracing the electrical faults related to old caps and a 7805 regulator. Now it boots to the hard drive. The system boots up and asks PASSWORD PLEASE- I have tried various passwords but none work. I found a binary of the MP/M OS that came with the SG 2800 here: http://www.cpm.z80.de/binary.html (search page for "Systems Group System 2800") Is there anyone here who can make me a bootable 8" disk by using this binary? In the meantime I am going to see if I can make a generic MP/M disk boot that will work this system, but it would be nice to get the disk the computer came with running. I don't have the skills to use the appropriate assembler, it has been years since Dan Rogantis's class on building a CP/M (MP/M) disk from a binary of the disk files. I suppose I could just copy them to a CP/M disk but I doubt it will boot. If I keep at it I can probably get it to work but I will accept help if this is an easy project for someone else. Suggestions? Thanks Bill
On Sat, Sep 2, 2017 at 3:21 PM, william degnan via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
Hi, After a lot of effort I repaired a Systems Group 2800 S-100 computer by tracing the electrical faults related to old caps and a 7805 regulator. Now it boots to the hard drive.
The system boots up and asks PASSWORD PLEASE-
I have tried various passwords but none work.
since you can get the system to boot, unless I'm mistaken, I doubt there is any cryptic password encoded in there, if you have a Monitor Rom installed, you can get a Hex dump of memory and disassemble the code and key in on this password prompt, then you should see the password string for comparing the input Dan -- _ ____ / \__/ Scotty, We Need More Power !! \_/ _\__ Aye, Cap'n, but we've only got 80 columns !!
And I'd still like to get a copy of the manuf. MP/M disk if any can help Bill Degnan twitter: billdeg vintagecomputer.net On Sep 2, 2017 3:21 PM, "william degnan" <billdegnan@gmail.com> wrote:
Hi, After a lot of effort I repaired a Systems Group 2800 S-100 computer by tracing the electrical faults related to old caps and a 7805 regulator. Now it boots to the hard drive.
The system boots up and asks PASSWORD PLEASE-
I have tried various passwords but none work.
I found a binary of the MP/M OS that came with the SG 2800 here: http://www.cpm.z80.de/binary.html (search page for "Systems Group System 2800")
Is there anyone here who can make me a bootable 8" disk by using this binary?
In the meantime I am going to see if I can make a generic MP/M disk boot that will work this system, but it would be nice to get the disk the computer came with running.
I don't have the skills to use the appropriate assembler, it has been years since Dan Rogantis's class on building a CP/M (MP/M) disk from a binary of the disk files. I suppose I could just copy them to a CP/M disk but I doubt it will boot. If I keep at it I can probably get it to work but I will accept help if this is an easy project for someone else. Suggestions?
Thanks
Bill
participants (2)
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Dan Roganti -
william degnan