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Siemens PC-D:

Dos Disk:

DEC Rainbow:

DOS disk:


CP/M-86/80 disk:



Robert

I have compiled a list of ICs to be read from these three and the Oly People system ... my own eprommer doesn't seem capable of doing this, and I'm not that savvy to cobble together my own reading tools.
I wouldn't mind posting the boards to some location in Europe (a heavy package to the USA seems prohibitively expensive), provided I get them back ... it would be great if somebody who has the means of reading these parts could contact me.

I hope I included all the parts in this list, sometimes it's hard to find information on the function of the ICs ... if somebody finds more parts needed on the pictures I posted, I'll include them in this list.

ICs to be read

Robert

Let's see...
the 8741A/AD is an I/O chip and shouldn't need dumping. The NEC 7220 is a display controller and also shouldn't contain a ROM, so no dumping there either.

The PALs do need dumping, but they require special hardware for that. They could get implemented in software though, so they are not necessarily required for "working" emulation

-Darkstar

Incorrect. The i8741 is most definitely an MCU with rom, a member of the MCS-41 family; it is often used as a keyboard controller on the motherboard of 286 or greater IBM PCs, but appears in other places as well.

LN

Hi,

that's a bit of relief ... I think you're correct about the 7220, seems I got mixed up in the thousands of non-results you get when you google classic ICs. The 8741 microcontroller has a 1k EProm though, so I'll probably have to get them dumped.

Robert

LN was quicker ... thanks for the clarification!

Bah, you're right of course. I wasn't fully awake when I posted that, and trusted google without thinking

thanks for the clarification

-Darkstar

Hi,

thanks for all the info so far

A hint for all noobs trying to get this working: the current state of emulation in MESS indicates the "DEC Rainbow 100" emu is "non working" and "without sound".

All you will see is a black screen with diagnostic error 18 (and probably error 16). This indicates a problem with the Z80 subsystem (CRC error).

I refer to the compiled versions of 'messui145u7b' and 'mess_winui_32bit_r14889' available on the net.

Guess the board logic is incomplete / not implemented yet...





Hope we will se some progress on this matter...

In the meantime, one might try the RBE - Rainbow emulator for DOS ( http://rainbow-100.com/archives/73/ ). Although i doubt it's very compatible.

( taken from RBE.DOC )

RBE requires an ANSI driver

One of the issues with the rainbow is the z80a has no rom at all; its entire 64k address space is ram (62k shared with the 8088, and 2k dedicated for itself); because the z80 boots at 0x0000, I *assume* the shared ram is from 0x0000 to 0xF7FF and the dedicated ram is from 0xF800 to 0xFFFF; the RX02 floppy drive must connect via I/O, and the 8088 cpu has to have some way of holding the z80 at address 0x0000 using /HALT or /WAIT or /BUSREQ before it uploads code for it to run into the 8088 side of the shared ram.

Do we have schematics of the Rainbow on bitsavers or something?
EDIT: not on bitsavers, but here: http://www.os2site.com/dec/rainbow/doc2/index.html

LN