ttlworks wrote:
That VT82C42 heyboard\mouse controller seems to be very exotic.
It still can be bought and it doesn't have to this one; any keyboard controller from an PC ATX board most probably will do. I also have some JetKeys laying around.
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... PIC18F452 has a parallel slave port, but PIC coding ain't fun.
The VT82C42 and other keyboard controllers are already pre-programmed. I wouldn't mind using a PIC or Atmel if I had sources that go with them. But I didn't even search because I already have the parts.
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DS12885 real time clock is a bit "outdated", and the bus interface isn't a nice one.
I agree but again, I have them and other types laying around. As mentioned before, the Eagle schematics are free; you don't like, just change it!
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To me the 29F010 EEPROM looks a bit small.
Bit baffled: uhh, why? IMHO 4 kB should be enough to load what ever OS or software you want to use. If needed, the 6522 can be used to bit-bang a SD card. And even then 4 KB should be enough. My personal idea is to use an HDD card in 8- bit mode with a CF card.
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Mouser has Microchip SST39SF010A, SST39SF020A, SST39SF040
I have 020s and 040s laying around as well. 128 KB is a nice value. Unless you have a good reason to use a bigger EEPROM; I always can use some of the I/O pins of the 6522 to swap the various 64 KB blocks.
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multipcb: 2 layers 4WD 121€ (2 layers 13WD 100€), 4 layers 5WD 200€ (4 layers 13WD 166€). //'WD' means 'workdays'.
Have a look at
https://jlcpcb.com/. I already used their services.
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Hmm... if you should be running out of PCB space,
The original ATX is 9.5"x9.5". My board is smaller.
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BTW: At ca. 30€, Meanwell RQ-125B doesn't seem to be much more expensive than a new ATX power supply at ebay.
Why should I? The ATX board is meant to be placed in a PC case. I regularly receive older PCs to scrap for parts so that leaves me with empty cases and power supplies.
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FTDI has some chips with USB host functionality.
I always can make an ISA card with USB functionality. That is the nice thing about ISA. Maybe the average won't find many ISA cards on its way but then, why not making some of your own?
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For Ethernet, take a look at....
To be honest, I'm not that interested in Ethernet. If I become interested, I'll first have a look at the various 3COM cards I have at home. If that doesn't work out, then I will steal Daryl's work
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