Euh ! Tu te souviens du chantier lorsque Ledudu a démonté la sienne pour prendre les photos ?
C'était une véritable salade de nappes et de PCB...
Après, c'est le remontage qui a dû être ardu
S'il n'y a plus à remonter, c'est différent
Euh ! Tu te souviens du chantier lorsque Ledudu a démonté la sienne pour prendre les photos ?
yaka comme tu disremy a écrit : ↑11 oct. 2022 15:55 Tout est là: http://www.pisi.com.pl/piotr433/6305y1_e.htm
Ensuite y a plus qu'à
Soit on envoie la bête à Piotr pour que le spécialiste nous fasse l'extraction, soit on tente de faire ça nous-même...
Format truetype, en vectoriel fait à la pogne avec mes petites mimines, il faut que je retrouve ça (encore un truc a retrouver, et si peu de temps ...)
Thanks Pocket, that makes totally sense. I see a pattern hereAs far I know, it was only for ROM extension. The ROM n command accept the value n from 0 to 199.
That is a question for Remy (I don't have the answer)Has the 702P ROM been dumped?
Thanks for clarifying, it is exactly that - but not knowing how to go further, I refrained from doing so.I don't think it would be possible or safe to dump the ROM using an IC clip.
I think you have a much more clear idea than my knowledge level allows me to understandThe circuit that is driving the address lines, for instance would have to be forced to voltage level and that could damage it. I had a look at the circuit to see how to dump the ROMs and unfortunately there's no BUSREQ signal going out to a connector (although it could come off the Z80 itself). The Z80 bus could then be 'grabbed' and the ROM dumped. I think a better way to grab the ROM contents would be to pull the Z80 out of it's socket and build a 'thing'that replaces the Z80, drives the address' bus and captures the data bus for the whole 64K memory address range. That should give you the contents of the ROMs,
Oh yes, very much so. But finding one is a real challenge.Ah, so the OP-2 does exist. If it has it's own ROM, though, that could be a problem. It would be tricky to get that interface working as the OP-2 does.
Same here, my unit used to work for years and one day it started blowing fuses repeatedly.i have an FP200 disk drive unit, but unfortunately it doesn't seem to work
Memory cartridges should be straightforward, and given modern memory ICs, any size is possible. Maybe even a large cartridge with switchable banks of RAM or flash. The cartridge could be hardware like the original, or you could use a RP Pico to emulate the memory. This allows you to use RAM on the Pico (250K+) and flash space (2Mb) to load different ROM images. The Pico can emulate ROMs and RAMs at the speeds of the FX9000p, see here for a ROM emulator I made:
VERY interesting, thanks for sharing !That hardware should be able to emulate RAM as well as ROM, so could be put onto a cartridge PCB.
It's funny in a way how large the prototype contraption is, although shorter, but wider than the 502P underneathThere's an FX-502P style interface on the OP-1 which could maybe work with a gadget I made to attach to the FX0502P: