Search found 386 matches

by kenneth
Thu May 06, 2021 11:06 pm
Forum: Hardware hacks and extensions
Topic: Oric V23 Modem
Replies: 56
Views: 4126

Re: Oric V23 Modem

I saw the technical data of the usb wire TTL-232R-5V, normally we can connect it directly on the Oric interface the level of the voltage is 5v only. The french Minitel terminal uses this same level voltage. The problem with 0-5v level, the wire to communicate is shorter than the -12, +12v level mode.
by kenneth
Thu May 06, 2021 12:50 pm
Forum: Hardware hacks and extensions
Topic: Oric V23 Modem
Replies: 56
Views: 4126

Re: Oric V23 Modem

The Oric interface uses 5v signals, which makes it compatible with the Minitel device which is why there is no Max242 chip to convert the voltage signals, even if the inputs of the minitel tolerate voltages up to 18v and -18v.
by kenneth
Wed May 05, 2021 10:54 pm
Forum: Hardware hacks and extensions
Topic: Oric V23 Modem
Replies: 56
Views: 4126

Re: Oric V23 Modem

With a DB9 connector on the old PC you have to add a MAX232 chip to make the signals of the Oric interface compatible. (The Max is a "pump" that creates +12v -12v from a 5v power supply). With the "5v" USB cord this is not necessary, the levels of the signals are 0-5v.
by kenneth
Tue May 04, 2021 10:57 am
Forum: General Discussion
Topic: Hardware boxes scans
Replies: 5
Views: 246

Re: Hardware boxes scans

All that remains is to make the polystyrene holder with an insulating foam spray and a terracotta mould. :mrgreen:
by kenneth
Sat Apr 17, 2021 9:59 pm
Forum: Games
Topic: Los Caminos de Galdeon
Replies: 20
Views: 1403

Re: Los Caminos de Galdeon

El juego funciona muy bien! 8)
by kenneth
Fri Apr 16, 2021 11:29 pm
Forum: Technical questions
Topic: Atmos powered SCART lead question
Replies: 5
Views: 458

Re: Atmos powered SCART lead question

If we consider that the Oric's ground is the referential, the psu produces -4v and +5v: the total voltage is 9v, then it is dangerous to connects the both wires like an independant power supply, it will produce a shortcut. However, if only one wire (+5v) is used to feed the Scart plug, that could wo...
by kenneth
Thu Apr 15, 2021 4:19 pm
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

Хорошие новости ! 8) 8) 8)
by kenneth
Mon Apr 12, 2021 1:44 pm
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

Exactly. 8)
by kenneth
Mon Apr 12, 2021 1:25 pm
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

The chip is a 27128 UVPROM with a 16k memory, in this case the Erebus don't work, you must burn an other UVPROM with a ROMDIS pin compatible.
by kenneth
Mon Apr 12, 2021 10:44 am
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

I agree with Dbug, there may be a UVPROM instead of the ROM in the Oric.
NB: The pin used by Erebus is /ROMDIS.
by kenneth
Mon Apr 12, 2021 2:25 am
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

Without SDCard, Erebus will try to send a "0" SPI code several times without answer, and finally the computer will give a "MEMORY ERROR" message. With a SDCard without TAP files, the computer will erase the screen and will give a "READY" message. If all this happens, that mean that Erebus is ok and ...
by kenneth
Mon Apr 12, 2021 2:00 am
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

Did you try Erebus without SDcard?
by kenneth
Sun Apr 11, 2021 11:27 pm
Forum: Technical questions
Topic: Erebus does not starts
Replies: 21
Views: 1175

Re: Erebus does not starts

it works with a 512Mb card, I have never tried with a smaller memory, it is necessary to format the SDcard in FAT16, some smartphones do format in FAT32 even if there is a low capacity in the SDcard.
by kenneth
Sun Mar 21, 2021 10:20 pm
Forum: Technical questions
Topic: Atmos SPACE key stuck
Replies: 6
Views: 426

Re: Atmos SPACE key stuck

Maybe the sacrifice of the FNCT key? :roll: