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#105674 - 05/21/16 10:00 AM Re: ITT 3030 [Re: rfka01]  
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rfka01 Offline
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Thanks, Stiletto!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105678 - 05/21/16 04:46 PM Re: ITT 3030 [Re: rfka01]  
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crazyc Offline
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I wonder if the 8278 is a 8071 with a mask rom as the pinouts are very similar and what isn't the same can be simulated with the right program (which seems like the case here).

#105679 - 05/21/16 06:52 PM Re: ITT 3030 [Re: rfka01]  
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Stiletto, that's awesome. I think between the 8278 data sheet and everything else I might be able to make this thing work.

#105680 - 05/21/16 08:16 PM Re: ITT 3030 [Re: rfka01]  
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@RB great, thanks!

@crazyc nope, machines #1 and #3 which have similar graphics cards both use 8741AD's

Machine #2 (which unfortunately doesn't work) is totally weird, its VKI (Video-Kombinations-Interface, which is actually mentioned somewhere in the docs) has a 5037 for video (the others use a 5027), a seperate Z80 CPU and Z80 pio.

#2 and #3 have 64K memory cards, #1 has 256K ... the docs stress the machine's modularity, maybe it's a candidate for a bus later on.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105681 - 05/21/16 08:24 PM Re: ITT 3030 [Re: rfka01]  
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Anyone here know the German computer magazine MC's homebrew system? The ITT3030's cards have designations like

MC 80-05 (CPU card, machine #1,#3)
MC 80-53 (Floppy card, machine #1,#2,#3)
MC 80-51 (Video/Combo card machine #1,#3)
MC 80-25 (64K RAM piggyback card, machine #2,#3)

I know that ITT had the 3030 designed by some other company, maybe they took a shortcut by mixing and matching well tried cards.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105682 - 05/21/16 09:02 PM Re: ITT 3030 [Re: rfka01]  
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I checked in an update with "better" z80/i8741 comms, but the keyboard is still not right and you lose the autoboot. Is there some disk that can be booted which gets us to a command line where the keyboard could theoretically be more easily figured out?

(Carl/hap/whoever, if you want to have a look, I put the disks I have in messftp/uploads/ITT3030_Disks/, the system is unique in that it won't bother to read the keyboard unless a valid floppy is inserted. Otherwise the Z80 halts and no video is shown).

Last edited by R. Belmont; 05/21/16 09:03 PM.
#105683 - 05/21/16 09:16 PM Re: ITT 3030 [Re: rfka01]  
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Originally Posted By rfka01
Imagedisk and Teledisk images of a known good boot disk

https://dl.dropboxusercontent.com/u/55419307/ITT3030/Boot3030.rar


This one should work, but I can't confirm on a physical machine until next week.

I'll check out your changes right away, thanks RB!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105684 - 05/21/16 09:34 PM Re: ITT 3030 [Re: rfka01]  
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Committed a further change which starts the floppy booting (it loads a few sectors, jumps to it and eventually goes off the rails). The keyboard is still wrong as you have to press z rather than b to boot.

Last edited by crazyc; 05/21/16 09:39 PM.
#105685 - 05/21/16 09:43 PM Re: ITT 3030 [Re: rfka01]  
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Originally Posted By rfka01
OK ... the video quality is ... debatable, but you can see dimly what this disk image boots into. When you switch the machine on, the first disk drive does a seek marathon not unlike the Apple II drives, then, if you press "b" the machine boots.

https://dl.dropboxusercontent.com/u/55419307/3030MAST.TD0

https://dl.dropboxusercontent.com/u/55419307/ITT3030%20boot.MOV


Yeah, the boot process is rather terse, although I can't remember if it's possible to boot if you put in the disk after you've switched on the PC.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105686 - 05/21/16 10:12 PM Re: ITT 3030 [Re: rfka01]  
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