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#79882 - 06/04/12 08:32 PM Re: ITT 3030 [Re: rfka01]  
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rfka01 Offline
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Once the floppy controller is hooked up and anyone is attempting to boot:

The screen will remain blank, and the machine will just sit there until you press "b" for boot.

Robert


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#79892 - 06/05/12 12:07 PM Re: ITT 3030 [Re: rfka01]  
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thanks for this, very helpfull.

#79914 - 06/06/12 10:10 PM Re: ITT 3030 [Re: rfka01]  
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I went through the technical manual again to understand the actual memory map better, how RAM and ROM interact. I think this should be correct, although I have no idea how to put it into software ;-)

I also made a table of the I/O ports, although I'm not sure if that's generic Z80 stuff or machine specific.

The video chip used is already in /src/emu/video/tms9927.c

ITT 3030 Memory and Port Map

Robert


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#80005 - 06/11/12 08:31 AM Re: ITT 3030 [Re: rfka01]  
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While sorting through stuff in my basement whistle I found a pile of paper which turned out to be more system information on the ITT 3030.

ITT 3030 Technical Information

As this is a rather large PDF file, I've extracted the first two pages, which are an English data sheet about the elusive MK3886 Z80 combo chip.

MK 3886 data sheet

Robert

Last edited by rfka01; 06/11/12 11:26 AM.

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#80006 - 06/11/12 08:46 AM Re: ITT 3030 [Re: rfka01]  
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Both links are the same.

#80009 - 06/11/12 11:27 AM Re: ITT 3030 [Re: rfka01]  
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Thanks, Robbbert ... Link is edited.

Robert


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#89448 - 07/07/13 01:57 AM Re: ITT 3030 [Re: rfka01]  
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This appears to be the disk definition for the 3030's odd 70 track format (560kB) for the 22DISK program:

BEGIN ITT3 Sel ITT 3030 - 70 Tracks 560 kB
DENSITY MFM,LOW
CYLINDERS 70
SIDES 2
SECTORS 16,256
SIDE1 0 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
SIDE2 1 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
ORDER EAGLE
LABEL ITT3030
BSH 4 BLM 15 EXM 0 DSM 271 DRM 127 AL0 192 AL1 0 OFS 4
END

This is from this old post:

https://groups.google.com/forum/#!topic/comp.os.cpm/PwQ7VxI-_L4

Robert


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#91656 - 11/27/13 09:35 PM Re: ITT 3030 [Re: rfka01]  
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In addition to the above post, this is the Anadisk analysis of the ITT3030's 70 track 560K disk format.

You can see noise from an older format starting with track 70.



NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#91657 - 11/27/13 09:41 PM Re: ITT 3030 [Re: rfka01]  
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I copied the floppy parts from the Kaypro driver over to the ITT3030 driver and created a custom format in lib/formats ... and lo and behold, something's happening. The message means "Floppy not ready"

https://dl.dropboxusercontent.com/u/55419307/itt3030_1.JPG

I've submitted this patch to Micko (he created the skeleton) for review and (maybe) publishing.

Last edited by rfka01; 11/27/13 09:47 PM.

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#91658 - 11/27/13 09:50 PM Re: ITT 3030 [Re: rfka01]  
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Here are pictures of all the boards present in my ITT3030.

https://dl.dropboxusercontent.com/u/55419307/itt3030_pix.zip

I've added the Layouts as ASCII graphics to the driver file.

The next steps would probably be to connect a keyboard and specify the memory and IO layout. As there's a 256K card installed, bank switching is involved.

The manuals are in German, but I can look up and find information for any kind soul who's willing to undertake this task smile - I can't find other drivers to model this upon.

Robert


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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