5 Nov
2005
5 Nov
'05
2:55 p.m.
In message <m1EXqVM-000IxJC at p850ug1>
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Hell yeah. I'll take a 6522 VIA over an 8255 any day.
For what it is
and WHEN it was developed, the 8255 is a pretty good device.
Oh come on. It's broken. Fundamentally. I can think of plenty that would be more useful if
they were still being
made. The 6522 would come high up the list.
Haven't heard of the Western Design Center then? http://www.wdesignc.com/
It's Bill Mensch's company - still making the 65C02 and 65C22 after what, 25
years?
I've got a few of their chips here - the 65C02 is fun to play with. Learned a
lot about microprocessors with a combination of reading databooks, feeding it
code and watching what it did on a logic analyser. Good little chip.
Later.
--
Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT
philpem at philpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB
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(A)bort (R)etry (W)ire up to a Tesla Coil and watch it glow like a lightning bug.