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I finally managed to dump the rom of my Psion Revo (German version). I first thought it was 16MB, which caused strange crashes of PsiROMx with memory leak (RAM file system corruption). But the info menu of the device showed that it was only 8MB, which address range dumped ok (in 2 parts because it has also only 8MB RAM).

https://github.com/explit7/Psion-ROM/issues/1

This is how I revived my Psion Revo:
https://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=122153#Post122153

The dump program and many other Psion roms can be found here:
https://github.com/explit7/Psion-ROM/

For dumping I used my Win98SE system (mainboard DFI K6-BV3+/66, AMD K6-3+@550MHz). Strange is that the docking station only works on COM2 port but the PDA is not recognized on COM1 (23pin? with adapter) despite the RS232 mouse works on both. The wallwart power supply is only for charging the battery - unplug it when fully charged to avoid overheat. To copy files on the Psion, you need PsiWin. My version 2.3.3 seems to temporary corrupt the explorer when copying files onto the PDA, so e.g. file extensions are not displayed anymore (despite enabled in options) and once even the desktop icons got termporary resorted into 2 vertical stripes. After reboot everything works again. By pressing menu key, the dump program PsiROMx shows a menu "advanced"(?) in that the memory range for the dump can be changes (important for PDAs with small RAM).

If you search more info about Psion software, this German language forum is one of the few still intact links.

https://www.psionwelt.de/psionwelt-hauptforum.html

But the software download section seems dead. Much of it can be found here:

https://jonasbark.de/folder/

Someone also makes money of a CD with software (I don't own it).

https://www.netogram.com/psionfreeware.html

Is this thread still where new dumps are submitted? It hasn't seen activity in 5 months.
Or is there some other official channel for that?

This is the official way to submit stuff: https://wiki.mamedev.org/index.php/Submitting_Source_Code

Dumped another Bandai RX-78 tape game today, Yellow Cab by dB-SOFT. Seems to work fine in MAME as well so feel free to add it Enjoy!

https://www.gamingalexandria.com/wp/2023/10/yellow-cab/

Already submitted a PR to add it and also cleaned up the instructions.

Hello, my name is Retro-Rock and I dump Japanese 8-Bit Pc games. I'm sure some of you have heard about me and I just joined in recently to show off the games I have. I got Sharp Mz-2200, Nec Pc-8001MkII, Sony SMC-777, Hitachi S1, Nec Pc-8801, Fujitsu Micro-7, Sharp X1, and Nec Pc-6001MkII games.

Welcome, I remember you from the tokugawa forums. Maybe you can help populating the software lists for some of those systems?

Welcome, Retro-Rock! Dumps of Japanese PC games can be hard to find so your help is greatly appreciated.

Welcome Retro-rock.

Out of curiosity, are you the one to thank for the dump of the nausicaa pc-6001 game? If so, thanks a ton.

Well, I'm not the one who dumped Nausicaa for Nec Pc-6001MkII, but I am the one who found some rare Nec Pc-8001MkII versions of games you guys might know about:
Pac-Man
Door Door
Lode Runner
Flicky
Punch Ball Mario Bros.
Flappy
Mystery Mountain
Salad No Kuni No Tomato Hime
Cannon Ball
Harvest
Champion Prowres Special