New Oric Project. The OriClone-1
Re: New Oric Project. The OriClone-1
Naive question: If you remove the 7905 and change the connector, could you power an Oric from a micro-usb or usb-c mobile phone charger?
Re: New Oric Project. The OriClone-1
Yes, and it works fine. But why to change the connector?
This is what I've done for OricExos
You need to short this two holes with piece of thick wire: And you can use any universal phone charger (output 5V and >600mA) with simple cable USB-to-barrel-jack:
Re: New Oric Project. The OriClone-1
The idea for changing the connector is mostly to make sure you don't put a usual 9v supply on the machine.
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Re: New Oric Project. The OriClone-1
And that's probably a good idea, the 7905/7805 at least allow to "blow" as a fuse if you put something wrong on the barrel jack (like inverted polarity or really wrong voltage. Completely bypassing is without a connector that warranty no other thing than 5V is probably not a good idea.
I would probably for for a USB-B plug as there is little chance to get anything else than 5V from there.
My Projects: Replic'Oric Project - StratoCumulus Project
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Re: New Oric Project. The OriClone-1
LM7905: At 1A 1.1V (demanding at least 6.1v at input)
LM7805: At 1A 2.0V (demanding at least 7.0v at input)
I'm aware the original power supply was nominally 9V. You need to look closely at the word "nominally" there (they were unregulated supplies, it will be higher off load, will be lower when loaded with an Oric, and peripherals, and if the mains voltage is at bottom tolerance or below etc.)
No-one proposed a 6.1v power supply, or a 7V one. You've missed the point of the "at least" in those statements. You need some headroom.
"Allegations of cheapness" doesn't even come into making a decision to use a power supply *at* the lowest limit possible. That's just awful design.
It does hold up. And like the 5V rail, it holds up better the lower the dropout voltage on the regulator! (Haha!)
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Re: New Oric Project. The OriClone-1
On the subject of using 5V USB power, I see exactly three problems. It's not much of one but it is relevant.
1) USB calls for a minimum of 4.4V which is below requirements.
2) USB only guarantees 500mA unless you have a charger (the most likely route to power)
3) You're supposed to negotiate for most of that power, but that's not really an issue in most cases.
I say, go for it but make sure you choose your phone source with a skeptical eye and avoid those Cheap Chinese Pink Charger (tm) thingies.
As for my project status, somewhat stalled due to work commitments (and other home issues) but I'm placing an order for boards next weekend! They usually arrive reasonably quickly but I hear the ports are starting to back up this time so fingers crossed.
1) USB calls for a minimum of 4.4V which is below requirements.
2) USB only guarantees 500mA unless you have a charger (the most likely route to power)
3) You're supposed to negotiate for most of that power, but that's not really an issue in most cases.
I say, go for it but make sure you choose your phone source with a skeptical eye and avoid those Cheap Chinese Pink Charger (tm) thingies.
As for my project status, somewhat stalled due to work commitments (and other home issues) but I'm placing an order for boards next weekend! They usually arrive reasonably quickly but I hear the ports are starting to back up this time so fingers crossed.
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Re: New Oric Project. The OriClone-1
I have, and it looks really exciting! I don't think there's enough Oric's to go around for everyone to have one though. It get's the grey matter all overheated considering the possibilities.ibisum wrote: ↑Sat Nov 21, 2020 9:21 pm Seen Exos?
https://forum.defence-force.org/viewtop ... =21&t=1880
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Re: New Oric Project. The OriClone-1
I mean, if there is to be a next-Gen Oric design, having multi-core Oric's doing video interlacing seems kind of intrinsic .. not suggesting anyone butcher their Oric's to build one, but certainly if there are FPGA chops in the crowd, we could take the idea and run with it.
Re: New Oric Project. The OriClone-1
Well, technically there are many ULA around, it's trivial to find, so at worse you could just add an expansion board to the Oric with three additional ULA and some RAMibisum wrote: ↑Sun Nov 22, 2020 10:54 am I mean, if there is to be a next-Gen Oric design, having multi-core Oric's doing video interlacing seems kind of intrinsic .. not suggesting anyone butcher their Oric's to build one, but certainly if there are FPGA chops in the crowd, we could take the idea and run with it.
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Re: New Oric Project. The OriClone-1
Also something that an FPGA/ASIC-based project could consider, no? I guess the hard work is really in defining a standard peripheral set for OriClone-1 and getting developers behind the new technology.
Re: New Oric Project. The OriClone-1
Hello
I made a PCB file with Kicad, but it is not tested.
It is called "Issue4b" because all components temporarily placed on the Issue4 pcb are integrated into the Issue4b pcb, with a new Reset button.
I made a PCB file with Kicad, but it is not tested.
It is called "Issue4b" because all components temporarily placed on the Issue4 pcb are integrated into the Issue4b pcb, with a new Reset button.
Last edited by kenneth on Thu Oct 19, 2023 8:28 pm, edited 1 time in total.
Re: New Oric Project. The OriClone-1
I drew the keyboard map, compatible with the modern format. The photo is a fake to illustrate.
https://retrowiki.es/download/file.php?id=200035030
https://retrowiki.es/download/file.php?id=200035030
Last edited by kenneth on Tue Mar 05, 2024 6:56 pm, edited 1 time in total.
Re: New Oric Project. The OriClone-1
I modified the file (v2), the tracks are wider.