> [..] I two HP-17BII (intl and english) and a HP-42S and need to dump its ROMs.
The difference between (intl and english) HP17 versions are the 32KB in the additional ROM. If you cut the last 32KB from the HP17BII intl ROM image you get an english version.
> I have a HP-48G (32Kbytes!) and HP-95LX and HP-200LX (that I think can receive RedEye IR format).
To make it simpler for most users, the program dump always the complete image. It's IMHO too difficult to explain how to merge seperated dump pieces and how to hack the assembler program to generate every piece.
Therefore a HP48G+, 48GX or a HP48SX with merged RAM card is necessary (70 or 100 KB of free RAM).
> I'm new to HP-48G, but I can build a program in the HP-200LX to access its IR receiver
> (as soon I can get some information about its hardware).
I only know the software interface to the hardware on the HP95LX. Transmitting data in redeye protocol is supported only on a very low level (timing and modulation of a half bit frame). Receiving is only supported by 1 bit (IR light detected or not).
> Do you know any program that do that? Even on the 48G, how do I receive RedEye prints on it?
The HP48 hardware is quite similar to the HP95X. In the receiving case you have also only one bit. HP published a receiving program INPRT, available on many places, quite a long time ago.
PC solutions need in almost all cases special hardware. Early DOS based solutions had only a dumb IR->wire converter and made the protocol decoding on the PC. A product end of 80'ies was PRINTHP in Germany. It only runs on PC's up to 386 and slow 486. Later PC's are too fast. I also wrote a receiver software at this time for DOS using the timer of the PC beeper as time reference. This program still work on some (not all) modern PC's when they are booted by DOS (not DOS box!). The other way are intelligent receivers converting the IR redeye protocol into a RS232C or USB data. I don't know a commercial manufacturer of such a product. I personally use a self made converter base on a AT89C2051 microcontroller decoding the data in realtime.
> P.S. I'm thinking in build a HP-85B emulator, do you know anything about its hardware?
Sorry I'm only familar with the Saturn based chips 1LT8, 1LR2, 1LR3, 1LU7, 1LK7 Saturn core and the 1LP2 interface chip.
Regards,
Christoph