Re: ORIC SDCARD
Posted: Wed Jan 08, 2020 10:39 pm
220 ohm.
Page 8 of 12
Re: ORIC SDCARD
Posted: Fri Jan 10, 2020 1:07 am
Yep
Re: ORIC SDCARD
Posted: Sat Jan 11, 2020 3:30 pm
I've used a slightly different approach, the "can't miss it!" button 
- IMGP7455_small.JPG (866.32 KiB) Viewed 9816 times
Re: ORIC SDCARD
Posted: Sat Jan 11, 2020 4:25 pm
But now it's got a bit of Atmos red in it.
Re: ORIC SDCARD
Posted: Sat Jan 11, 2020 8:47 pm
Nice bit o' red!
Re: ORIC SDCARD
Posted: Thu Mar 19, 2020 2:33 pm
I have Slightly changed the Erebus case. It now has Colour.
Re: ORIC SDCARD
Posted: Thu Mar 19, 2020 4:10 pm
the color is very visible and the contours are sharp 
Re: ORIC SDCARD
Posted: Fri Mar 20, 2020 2:57 pm
Its done with my new toy for the 3d printer. Its a Palette 2s, it can do 4 different colours in one print.
Re: ORIC SDCARD
Posted: Thu May 07, 2020 7:46 pm
This works fantastic on my Oric Atmos and the box colour coding is great. Transforms my use of my Oric.
I'm wondering why I can't get it to work on my Oric-1 with 1.1 ROM as it won't boot with the erebus plugged in. The reset button on the erebus results in a different tone on the speaker when pressed but doesn't reset the machine.
Has anyone got any ideas?
Solved!. Sort of
I had an Idea. I transferred my atmos 1.1 rom to my oric 1 and the erebus works fine on the oric 1 now so its the 1.1 rom I wrote which must be the issue. I used a M27128A eprom. Anyone had any issues with these?
I'm wondering why I can't get it to work on my Oric-1 with 1.1 ROM as it won't boot with the erebus plugged in. The reset button on the erebus results in a different tone on the speaker when pressed but doesn't reset the machine.
Has anyone got any ideas?
Solved!. Sort of
I had an Idea. I transferred my atmos 1.1 rom to my oric 1 and the erebus works fine on the oric 1 now so its the 1.1 rom I wrote which must be the issue. I used a M27128A eprom. Anyone had any issues with these?
Re: ORIC SDCARD
Posted: Thu May 07, 2020 8:56 pm
It is due to the EPROM chip. Erebus, as Microdisc, disables the ROM using the Chip Enable pin, which in EPROMs is used to program them, so it does not work.
There is a mod to solve that.
There is a mod to solve that.
Re: ORIC SDCARD
Posted: Fri May 08, 2020 6:04 pm
Hi,
Erebus is working fine now I've grounded the Chip Enable pin but the Oric wont boot with Erebus disconnected. Is there a way around this?
Erebus is working fine now I've grounded the Chip Enable pin but the Oric wont boot with Erebus disconnected. Is there a way around this?
Re: ORIC SDCARD
Posted: Fri May 08, 2020 6:15 pm
Re: ORIC SDCARD
Posted: Fri May 08, 2020 6:59 pm
Probably, I wouldn't know...
Re: ORIC SDCARD
Posted: Fri May 08, 2020 7:27 pm
The schematic is good. If the IC11 empty socket is used with a 74LS00 chip , LK removed, pin number 12 cut from A13 to be connected to Romdis pin and pin27 of eprom diconnected, the Oric computer will run with a 27c128 memory that could be desactivated with known intefaces.axeman wrote: ↑Fri May 08, 2020 6:15 pm I think its this you refer to ?
download/file.php?id=648&mode=view
Ps: The other possibility, remove the eprom chip and put a little pcb on the rom socket, this one will embed the logic chip 74ls00 and the uvprom, to avoid the injuries of the pcb tracks
Re: ORIC SDCARD
Posted: Fri May 08, 2020 8:17 pm
Thanks for your replies. I'd prefer not to cut tracks so I'll develop a piggy back socket mod.