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Joined: Mar 2001
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The WDx7xx is emulated to a boots-copy-protection level of detail, so no datasheets are necessary 
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Joined: Jan 2012
Posts: 1,191 Likes: 17
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Very Senior Member
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In the TRS-80 thread Robbbert mentions that I've had problems using wd_fdc as well. In my case (2 different drivers), firstly 0xd0 is sent (which seems to work), followed by 0xc0, which causes the fdc to stop responding, returning status 0x81 forever. I've been patiently waiting for the author of the code to fix it, but nothing so far.
I should point out that using WD1772 works fine, but 1793/2793 etc does not. ... the data sheet mentions a fundamental difference in the xxx3 models to the other chips, so I thought this might help
NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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Joined: Apr 2012
Posts: 193
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I have spent considerable effort into improving 'rainbow.c' and 'vtvideo.c' now. A bezel with nice LEDs is there and RAM up to 896 K is recognized by the native BIOS. Still, error messages 13 and 50 are beyond my grasp. Is there hope for a working keyboard any time soon? I am willing to debug, too Apart from the keyboard, what steps will have to be taken next? Is it the floppy or the not-yet-existing hard disc? Guess the non-standard layouts could cause problems. P.S.: i know nothing about slot devices, so i went to implement addon hardware via DIP switches. Hope no one bothers.
Last edited by Bavarese; 09/18/13 01:51 PM.
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Joined: May 2004
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We do bother, because someone will eventually have to clean that up using slot devices, so better do it right from the start. There is lots of legacy stuff still in MESS and we don't want to add more.
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Joined: Jan 2012
Posts: 1,191 Likes: 17
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Very Senior Member
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Bavarese mentioned in the shoutbox that he'd like to get BIOS dumps for the Turbow-286 accelerator card for the Rainbow. I've contacted Jeff Armstrong who admits to owning one Let's see if he can help. In the meantime, there are pictures of this beast here: http://archive.is/50OxYRobert
NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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Joined: Mar 2001
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Wow, that thing really is a beast
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Joined: Jan 2012
Posts: 1,191 Likes: 17
Very Senior Member
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Very Senior Member
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Jeff Armstrong got back to me - he'll dig out his turbow-286 and dump its ROMs. In the meantime he sent me a real gem - the ROMs for the DEC Rainbow 190, a machine for which the only information on the 'net seems to be "it's rare". https://dl.dropboxusercontent.com/u/55419307/rainbow_rom190.zipIts secret seems to be (quoting Jeff): "The Rainbow 190 has _zero_ hardware differences from the 100B. If MESS can emulate the 100B, it just needs the 190's ROMS to emulate it as well. " and later "I've attached the ROM dumps for the Rainbow 190. These should work just fine on a Rainbow 100B emulator in theory. They correspond to Rainbow firmware version 5.05A, whereas normal 100Bs use firmware version 5.03A. I'm not sure what's different, and I doubt anyone remembers anymore. I had some trouble with the 190's power supply, so I think I'll wait until tomorrow to figure out which Rainbow has the Turbow card (I have quite a few Rainbow's) and to subsequently dump the ROMs. I don't usually use the Turbow because I suspect it is providing too much load on the aging motherboards it's attached to.
I'll also be posting the ROM dumps to rainbow-100.com when I get around to it." Robert
NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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Joined: Jan 2012
Posts: 1,191 Likes: 17
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News from Jeff Armstrong: I'll have to look at the 190 ROMs, but I'm pretty sure they're unlabeled. In the meantime, I was able to transplant the Turbow-286 card and ROM into another Rainbow and managed to get the system to boot (still having serious issues, though).
I've attached the two ROM dumps. I'm pretty sure that ROM1 is the stock 100B ROM, although my system has a ClikClok installed in between ROM1 and the board (I doubt that'd make a difference in the ROM dump). ROM0 is labeled: "TBSS 1.3" on line 1 and "3ED4" on line two (a checksum perhaps?).
I do have hi-res versions of the Turbow pictures somewhere. I'll have to look, but they should be accessible via the gallery I host. The chips aren't overly interesting, except that there does appear to be a GAL, which will make emulating it a pain. I remember reading that one of the chips, a 286-to-8088 adapter chip, was quite exotic at the time.
I'll let you know when I find the pictures and check for Rainbow 190 ROM labels.
NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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Joined: Jan 2012
Posts: 1,191 Likes: 17
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Very Senior Member
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With the Rainbow driver, ScrLock does not switch between partial/full keyboard emulation, so Shift-F3 always hard resets the machine. On a real Rainbow, Shift-F3 would enter the configuration menu.
Robert
NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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Joined: Mar 2001
Posts: 17,250 Likes: 265
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Very Senior Member
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Something just occurred to me: have you done anything locally to emulate the Rainbow keyboard? If not, it doesn't exist and that's why the emulated machine can't be interacted with.
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