Hi guys

I was wondering if anyone on the forums who hails from the UK has a reliable source of Rockwell or CMD 65C51 ACIAs? I'd normally go along with the WDC version, but until they fix the xmit bug issue I'd rather avoid (which is a real shame). I've looked on Farnell and Mouser, but can't find any apart from the WDC version. All the ones off of ebay are too slow (1 or 2MHz) or from outside the country. I need ones rated for 10MHz or higher, ideally.

Also, is there a keyboard type people can recommend with when it comes to 65C02 home brew systems? I've gotten my LCD sorted out (apart from a few code glitches) and so want to get some input sorted out.

(It might be worth a cross-post on the stardot forums, for UK/6502 purposes
http://stardot.org.uk/forums
)

I have a standard PC keyboard interface using a 6522 here:

http://sbc.rictor.org/pckb6522.html

I also have used an ATTiny26 microcontroller to convert the PC keyboard to ASCII.

http://sbc.rictor.org/pckbavr.html

If you cannot find a ps/2 keyboard, I've heard many USB keyboards will revert back to ps/2 mode (aka, using the usb - ps/2 adapters). You would have to do the research though.

There are many others out there too.

Daryl

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Please visit my website -> https://sbc.rictor.org/

As alternative proposed by Daryl, one possibily chance is to use a PIC microcontroller (or Others) to emulate the uC 80XX series used on older PC as PS2 interface.
The advantage is that micro can buffer keyboard/mouse activity without disturb the cpu (i experimented some problems using an interrupt driven routine that manage directly the Ps2 protocol).
More, with a microcontroller as ps2 interface, is easy to intercept some Keys combination to generate an NMI to cpu. The more complex part is the interface cpu/microcontroller, that can be imp'lmented with a simple file register (like 74ls/hct670) and a simple interrupt way to communicate.

Marco

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http://65xx.unet.bz/ - Hardware & Software 65XX family

My micro uses a C64 keyboard polled by an AVR. The AVR, in turn, is connected to a 6522, with bytes handshakes across a parallel port. From the POV of the MPU the keyboard is entirely interrupts driven. I think it is a nice balance of an efficient, interesting, a little novel as I wrote the code, and also a sufficiently retro solution.

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8 bit fun and games: https://www.aslak.net/