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#111269 - 11/13/17 07:05 PM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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It's not that scary, there's just a small matter of programming it, is all, taking care of all ROPs as well.

#111550 - 12/08/17 08:56 AM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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For my latest trick, I now present the InterPro "blue screen", the entry point for configuring the system and formatting disks and installing CLIX etc.

The mouse pointer moves, but doesn't track vertically for some reason, and there are also some lines missing (e.g. around the buttons) because my line drawing hardware emulation isn't up to scratch yet, but this is a milestone for me.

The toughest part was working out how the "data select" mode operates when writing to video buffer memory - essentially it expects a write to video memory of 4 bits to expand to 4 8bpp pixels/bytes using the active "plane data". Of course, now that I know/understand it's all obvious smile

[Linked Image]

#111566 - 12/09/17 12:31 AM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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Very, very cool.

#111573 - 12/09/17 01:09 PM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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R. Belmont Online content
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Considering how aggressively secretive I remember Intergraph being back in the 80s/90s I'm really impressed it's gotten this far.

#111617 - 12/12/17 04:50 AM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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Got the mouse tracking properly, and enough line drawing to make it usable. Time to start playing with SCSI and such again.

[Linked Image]

[Linked Image]

[Linked Image]

#111619 - 12/12/17 01:48 PM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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R. Belmont Online content
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Was there an x86 card available for those workstations to run DOS, or is it an emulator?

#111624 - 12/13/17 07:16 AM Re: Intergraph InterPro WIP [Re: pmackinlay]  
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In fact, there was both a hardware x86 emulation card, named "Hard PC", as well as a port of the relatively well-known SoftPC software emulator. Unfortunately, I have next to no information on the former; a quick search throws up the link below, which is interesting, but doesn't reveal anything too informative about the hardware.

I'm not at all sure if the PC-DOS button on the blue screen was the only way to boot this Hard PC hardware, or whether it could be accessed concurrently via CLIX. I do know that there was an InterPro model 29xx system designed and manufactured which was based on the 2xxx series case/monitor etc., but used a PC (Pentium?) motherboard, but this system was not able to run CLIX or CLIPPER software. It was basically just a PC in an InterPro box, designed to run Windows NT, supposed to allow existing customers to extend the life of their InterPro monitors and maybe some other peripherals.

The Hard PC board would be an excellent longer term emulation target, but I suspect there's even less information available than the slim pickings I have for the InterPro, so progress may be very slow.

Just found a few more bits and pieces of information - it appears the Hard PC had a 486 CPU, some kind of VGA hardware/emulation, and supported 2, 4, 8 or 16 megabytes of its own SIMM memory. It appears the board's "ROMs" (presumably system BIOS and VGA BIOS, at least) were loaded at start by the host, so it's possible these files exist somewhere in the OS media. I think the VGA on the board was essentially "copied" to the host video memory at runtime. All of these seems to indicate that the host and emulator could run concurrently.

PS: got enough SCSI working to enable the "rebuild" process to complete, and it's now crashing somewhere when attempting to boot the minimal rebuild environment.

Old Microsoft knowledge base article relating to Intergraph HardPC

[Linked Image]

Last edited by pmackinlay; 12/13/17 07:29 AM. Reason: added more Hard PC information
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