GEM or CP/M on a Jr?

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GEM or CP/M on a Jr?

Postby OldComputerGuy » Sun Dec 18, 2016 8:51 am

Does anyone know if Digital Research's GEM or CP/M will run on a PCjr?
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Re: GEM or CP/M on a Jr?

Postby jmetal88 » Tue Dec 20, 2016 8:46 pm

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.
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Re: GEM or CP/M on a Jr?

Postby Vorticon » Wed Jan 04, 2017 7:54 am

I use GEM regularly for its file management operations as well as some word processing. Works great!
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Re: GEM or CP/M on a Jr?

Postby geoffdaddy » Wed Jan 04, 2017 9:32 am

Well, IBM did sell CP/M-86 for the original IBM PC. Would that not work?
PCjr: 10MB RACore 01 hard drive expansion, Hotshot 640kB RAM expander, optical mouse, Xircom PE3, speech sidecar.
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Re: GEM or CP/M on a Jr?

Postby Meknapp » Thu Jan 05, 2017 9:13 pm

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?
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Re: GEM or CP/M on a Jr?

Postby Trixter » Fri Jan 06, 2017 10:54 pm

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.
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Re: GEM or CP/M on a Jr?

Postby geoffdaddy » Mon Jan 09, 2017 3:07 pm

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. ;)
PCjr: 10MB RACore 01 hard drive expansion, Hotshot 640kB RAM expander, optical mouse, Xircom PE3, speech sidecar.
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Re: GEM or CP/M on a Jr?

Postby Vorticon » Sun Jan 29, 2017 6:51 pm

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.
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Re: GEM or CP/M on a Jr?

Postby OldComputerGuy » Thu Feb 23, 2017 6:39 am

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.
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Re: GEM or CP/M on a Jr?

Postby jmetal88 » Fri Feb 24, 2017 5:46 am

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
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