> Using a modified C64 pen I could get the y-position rather well > but the x-coordinate was all over the shop.
X coordinate is done to 4 byte intervals... which means you can only get an x value for every 8 pixels in mode 4. Oh, and the bottom bits have to be masked off... Simon -- Email:[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Snail:1 Dovey Close, Astley, Tyldesley, Manchester, M29 7NP, UK Tel: (01942) 886084 Fax: (01942) 886084 (ring voice first to confirm!) WWW: (Newly updated) http://jumper.mcc.ac.uk/~simonc
