The TRS-80 Journey Continues

Bill Gunshannon bill.gunshannon at
Wed May 11 20:17:53 CDT 2022

On 5/11/22 21:07, Bill Degnan via cctalk wrote:
>>>> Was it SYSGEN?
>>> As near as I can tell SYSGEN only modifies a file (or two) but
>>> does not copy any files to a new location.
>>> Bill
>> No, SYSGEN is the CP/M command to initialize a blank, formatted disk with the CP/M system:
>> “The SYSGEN transient command allows generation of an initialized disk containing the CP/M operating system. The SYSGEN program prompts the console for commands by interacting as shown...” (From
>> SYSGEN puts the CP/M system files on a reserved (not visible) area of the disk. It is a separate program, not a built-in command. On the Osborne (which I used), CP/M was 4KB in size. You can use then use PIP to copy the other, visible files.
>> Bob
> This is a very good point. Bill what OS is your hard drive?  I am not
> sure if you need the disk you're creating to match the hard drive or
> not, but it will make life a lot easier if they are the same.  LDOS,
> NEWDOS, TRSDOS, CP/M are all very different and only NEWDOS attempts
> at being compatible with other OS's.

Because my "hard disks" are FreHD, MISE and M3SE  I have multiple
operating systems.  I plan to work with CP/M, TRSDOS, LDOS, LS-DOS,
DosPlus and NEWDOS80.  They were all the ones I worked with back
when the TRS-80 was still new and I actually still have copies of
disks and documentation for most of it.  CP/M and DosPlus were my


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