I found this with a machine I bought a few years back.
Anyone knows what it could be used for?
unknown interface with 6821
- ibisum
- Wing Commander
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Re: unknown interface with 6821
Some kind of peripheral I/O expander, maybe an attempt to give the Oric extra I/O to support a modem or perhaps joysticks? Those empty sockets are kind of interesting.
For reference:
https://en.wikipedia.org/wiki/Periphera ... ce_Adapter
For reference:
https://en.wikipedia.org/wiki/Periphera ... ce_Adapter
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- Flight Lieutenant
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Re: unknown interface with 6821
Yeah it's like a VIA but less Versatile
The sockets are just cheap connectors to link to a breadboard or whatever, just like on an arduino, the pinout seems to be the 8 I/O lines on one side, then the 2 control lines, 3 pins for ground and 3 pins for 5V.
The sockets are just cheap connectors to link to a breadboard or whatever, just like on an arduino, the pinout seems to be the 8 I/O lines on one side, then the 2 control lines, 3 pins for ground and 3 pins for 5V.
Re: unknown interface with 6821
I will have to check some books, seems like the previous owner might have been a radioamateur (not sure about the English word for that). So maybe he plugged his radio hardware to the Oric.
- ibisum
- Wing Commander
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Re: unknown interface with 6821
It would be fascinating to know how this works in case it gives us a path to MIDI or Serial I/O ..
Re: unknown interface with 6821
It monopolizes the Page3 from #380 to #3FF for only...4 I/O registers
Re: unknown interface with 6821
No serial output nor input, I'm afraid. It seems an add on to provide with 16 digital I/O. With external interrupt support. If I am right, the unpopulated sockets just give easy access to the two 8 bit ports plus some other signals of the PIA.
Great for experimenting, but not sure if anything else.
Great for experimenting, but not sure if anything else.