--- Nicolas Welte <email@example.com> wrote: > You're right of course, the 6529 is not a common chip at all, I only used it > as an example how small a single port I/O chip should be. The 6821 would be a > good choice... If anyone is interested, I have a number of NOS (New Old Stock) 6821 chips from when I used to work at a company that built 68000-based intellegent serial cards for VAXen and PDP-11s. We drove an optional programmer's console with one I/O port and a Dataproducts printer port with the other. They work great on an 8MHz 68000, but I presume they are 1Mhz or 2Mhz chips. Not sure at this point. I don't think they are a discontinued chip. If anyone is interested, contact me off list. They aren't getting pitched (they've been in my basement for about 8 years), so don't fear missing out. ISTR they are drop-in replacement for some uses of the 6520, but I haven't done it myself. Maybe I should check the pinout and if good, stick one in a PET and see how the IEEE and keyboard work. -ethan ===== Visit "The Seventh Continent" http://penguincentral.com/penguincentral.html __________________________________________________ Do You Yahoo!? Yahoo! Sports - Coverage of the 2002 Olympic Games http://sports.yahoo.com Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.1.