On Sat, 30 May 1998, Allison J Parent wrote: That's OK. The Apple was only able to sense one keypress at a time anyway. In fact, you still had to scan an address to see if a key was pressed (location $C000). If the hi-bit was on, a key was pressed. After you read the key, you would have to then access (read or write) location $C010 in order to reset the keyboard strobe. If you didn't do that, the keypress location hi-bit would remain set. However, the value would change for each new key pressed, but you could still only read one keypress at a time. It was hokey and funky but you leanred to work around it, and besides not having a type-ahead buffer (unless you kludged one in software) it worked fine. I don't know what you mean by n-key rollover. But it only buffered on keystroke. If you pressed another key before you scanned the keyboard strobe, you lost the previous keypress. Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2 See http://www.siconic.com/vcf for details! [Last web page update: 05/30/98]