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GEM or CP/M on a Jr?

PostPosted: Sun Dec 18, 2016 8:51 am
by OldComputerGuy
Does anyone know if Digital Research's GEM or CP/M will run on a PCjr?

Re: GEM or CP/M on a Jr?

PostPosted: Tue Dec 20, 2016 8:46 pm
by jmetal88
I kind of doubt CP/M would, but I've run the DOS version of GEM without much issue. Windows 3.0 will also run if you have enough RAM installed.

Re: GEM or CP/M on a Jr?

PostPosted: Wed Jan 04, 2017 7:54 am
by Vorticon
I use GEM regularly for its file management operations as well as some word processing. Works great!

Re: GEM or CP/M on a Jr?

PostPosted: Wed Jan 04, 2017 9:32 am
by geoffdaddy
Well, IBM did sell CP/M-86 for the original IBM PC. Would that not work?

Re: GEM or CP/M on a Jr?

PostPosted: Thu Jan 05, 2017 9:13 pm
by Meknapp
Vorticon wrote:I use GEM regularly for its file management operations as well as some word processing. Works great!


Does GEM support the 16 color PCjr graphics modes, or are you stuck with the 4 color standard CGA modes?

Re: GEM or CP/M on a Jr?

PostPosted: Fri Jan 06, 2017 10:54 pm
by Trixter
I manually checked GEM 2.0 and 3.0 and did not see any support for PCjr or Tandy video modes. (I did discover, however, that GEM 3.0 supports an interesting THE GENIUS Monitor / THE GENIUS Monitor Card combo for a resolution of 728x1008 (!) I'm guessing this is a pageview monitor.)

Checking John Elliot's excellent pages, I see that http://www.seasip.info/Gem/Drivers/video.html lists a Tandy 1000 driver, but it appears no different than the CGA 640x200 driver.

Re: GEM or CP/M on a Jr?

PostPosted: Mon Jan 09, 2017 3:07 pm
by geoffdaddy
I'm sure an enterprising individual could write a device driver to support the VDI for the PCjr if so inclined. No, I have no desire. ;)

Re: GEM or CP/M on a Jr?

PostPosted: Sun Jan 29, 2017 6:51 pm
by Vorticon
Meknapp wrote:
Vorticon wrote:I use GEM regularly for its file management operations as well as some word processing. Works great!


Does GEM support the 16 color PCjr graphics modes, or are you stuck with the 4 color standard CGA modes?


Actually it only works in monochrome (black text on white background)... Very much reminiscent of the early Mac OS.

Re: GEM or CP/M on a Jr?

PostPosted: Thu Feb 23, 2017 6:39 am
by OldComputerGuy
What about ViewMax? That was basically the color version of GEM that shipped with later versions of DR DOS. Is anyone using that? DR DOS seems to be easier to get your hands on than GEM.

Re: GEM or CP/M on a Jr?

PostPosted: Fri Feb 24, 2017 5:46 am
by jmetal88
OldComputerGuy wrote:What about ViewMax? That was basically the color version of GEM that shipped with later versions of DR DOS. Is anyone using that? DR DOS seems to be easier to get your hands on than GEM.


There are a whole bunch of GEM versions up for download here:

http://www.deltasoft.com/downloads-gemw ... GEMEnglish