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#105687 - 05/21/16 10:15 PM Re: ITT 3030 [Re: rfka01]  
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rfka01 Offline
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Wow, great! Compiling right now ... but a combination of a holiday apartment's complimentary WIFI and my light ultrabook don't make for speedy development ... hooray for single driver compile!

Thanks to everybody for chiming in, especially RB & crazyc for the actual work!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105688 - 05/21/16 11:06 PM Re: ITT 3030 [Re: rfka01]  
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Beautiful, I'm glad that particular white whale's finally running smile

#105689 - 05/21/16 11:18 PM Re: ITT 3030 [Re: rfka01]  
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still compiling ... but contacted a guy about his ITT2020 grin


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105692 - 05/22/16 08:58 AM Re: ITT 3030 [Re: rfka01]  
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Yay for time zones ... crazyc's been figured out a lot of new stuff!

I'm going through the manuals again, looking for relevant stuff.

- there are only two internal floppies, the third one is possible, but only as an external unit, probably like the harddisk you can see here

http://www.computermuseum-muenchen.de/images/index-itt3030.jpg

- After switching on the machine, the screen is supposed to stay dark, the "Floppy nicht bereit !" (floppy not ready message) is therefore "wrong" (but obviously present in the ROM).

- the serial port, timers/counters, iterrupt and daisy chain logic and some 256bytes of RAM are done using a MK3886 chip

- I have never seen mention of a 512K RAM card, only 64K or 256K

- banking: "You can access C000-FFFF on any of the activated banks 0-7 from the internal bank 8 without switching. This facilitates the exchange of common data" (service manual, p.17, this also has the values for selecting the pages via OUT F6H

- something about incomplete address decoding (and the subsequent repetition of memory regions) as well as the relation between main memory and (screen buffer?) memory on the video combination interface on p.50-52 of the service manual

- on p.54 info on how to protect 64 bits out of the 256 on the MK3886


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105700 - 05/22/16 03:16 PM Re: ITT 3030 [Re: rfka01]  
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Originally Posted By rfka01
- banking: "You can access C000-FFFF on any of the activated banks 0-7 from the internal bank 8 without switching. This facilitates the exchange of common data" (service manual, p.17, this also has the values for selecting the pages via OUT F6H

The 256K manual seems to imply the c000-ffff region is static and the 256K CPM on the ITT and SYS floppy images won't boot unless it's like that. Those images also currently hang if you try to run a command that doesn't exist, looks to be a fdc hookup issue. I added the screen color to try and match the image you posted earlier but it might be better for you to tweak by comparing to the screen directly rather than though a photograph.

#105704 - 05/22/16 07:56 PM Re: ITT 3030 [Re: rfka01]  
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A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]

We're searching for QMC2 translators and support for existing translations. Interested? See here!
#105705 - 05/22/16 08:29 PM Re: ITT 3030 [Re: rfka01]  
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Thanks Rene, that definitely points out some things we don't know yet, although Carl did a great job by guessing.

#105706 - 05/22/16 09:32 PM Re: ITT 3030 [Re: rfka01]  
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rfka01 Offline
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crazyc, I think you matched the colour of that particular monitor very well!

Rene, thanks for the translation.

The keyboard's vexing: Shift-lock works, shift doesn't, but there seems to be no correlation between the position of the keys in the MAME source and the keyboard matrix in the "technical information" document.

One thing I found though is that special keys like SHIFT or CTRL are not special to the keyboard, but send their codes as any other key (service manual p.163).

Sometimes right after a reset, you have to press "B" twice before the keypress is registered, but the surplus b then shows up on the CP/M prompt.

This resounds with a tendency of the driver to "eat" keypresses, e.g. in the file select dialog where you sometimes have to press the arrow keys or Enter twice to register.

If you boot 3030inf0.td0, only every other keypress produces visible results, but spits out the previous character as well - don't know if those two phenomena are related.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#105707 - 05/22/16 10:46 PM Re: ITT 3030 [Re: qmc2]  
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Tauwasser Offline
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Originally Posted By qmc2
OK, get my translation of the 256K-RAM card manual here:


I/O address should be F5h, not F4h in the first mode description.
The rest of your translation is a bit rough, but accurate.

#105709 - 05/23/16 06:54 AM Re: ITT 3030 [Re: rfka01]  
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qmc2 Offline
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Sorry for the typo (corrected now)! Even the German original doesn't "sound nice", the translation tries to follow that.


A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]

We're searching for QMC2 translators and support for existing translations. Interested? See here!
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