15 Apr
2006
15 Apr
'06
3:28 p.m.
On 4/15/2006 at 9:02 PM ard at p850ug1.demon.co.uk wrote:
For example, it works under CP/M
That trick is in the Epson PX8 user manual. It suggests creating a 0 byte
COM file called GO.COM which can then be used to re-enter the last
executed program.
Well, yes and no. If the user program was large enough to clobber the CCP,
the trick won't work, as the CCP is reloaded to get to a command prompt,
thereby overlaying the original program. In addition, the program being
restarted had better be re-entrant after termination; something not
extremely common in the CP/M world.
Does anyone know of a checkpoint/restart facility for CP/M programs? That
is, hit a key or trigger an interrupt, and the CP/M program and any
dependent context is swapped out to disk and the system returned to a
command prompt?
Cheers,
Chuck