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General Category => Applications (CPC and CPC-related) => Topic started by: martin464 on 14:28, 18 January 23

Title: CP/M+ boot from B: hack
Post by: martin464 on 14:28, 18 January 23
In case anyone else wants to do this!

The attached CP/M+ disk has a file bcpm if you run it, it boots from B: drive
Works on 6128 or upgraded 464, Parados or Amsdos

The hack is it does the rsx's job to put the first loader in ram then patches it and calls it so the ems file is still loaded from disk

The only downside is it doesn't pick up the profile.sub so have to cancel out of that and switch to B: at the command prompt. It's a "feature"

Title: Re: CP/M+ boot from B: hack
Post by: GUNHED on 14:33, 18 January 23
Well done! Now to use profile.sub you got to patch the EMS files. Also: Why do you still use DATE.COM without year_2k patch? Nice job you did  :) :) :) but...


Why don't you use the great X-DDOS?

You can use the command !CPM,0 or ,1 for drive A (with A=A or A=B) or !CPM,2 to boot from a B-Drives - Vortex format with 704 KB space and all .COM programs you'll desire!  :) :) :)
Title: Re: CP/M+ boot from B: hack
Post by: martin464 on 14:47, 18 January 23
Hmm i did not know about that, guess i could have saved a few hours work there! (but it felt amazing to see CP/M+ loading especially on a 464)

This is just a stepping stone to getting HD CP/M working so it's ok as a temorary hack to do some stuff that's the plan :)
Title: Re: CP/M+ boot from B: hack
Post by: martin464 on 15:09, 23 January 23
Gun, i did use the Dobbertin ramdisc program successfully to get an M: drive

Without wishing to create a new topic, does anyone have a dsk with zpm3 on it ?
Title: Re: CP/M+ boot from B: hack
Post by: Poliander on 15:22, 23 January 23
Quote from: GUNHED on 14:33, 18 January 23You can use the command !CPM,0 or ,1 for drive A (with A=A or A=B) or !CPM,2 to boot from a B-Drives - Vortex format with 704 KB space and all .COM programs you'll desire!

I would love to see ParaDOS/VaraDOS to support this, too
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