derhak@wasatch.utah.edu (Max W. Derhak) (09/02/89)
In article <45059@bbn.COM> slackey@BBN.COM (Stan Lackey) writes: >Does anyone know if the VBI is synchronized to the power line? If so, >one-bit-per-VBI is possible, even if the two ataris happen to be >plugged into opposite phases. It seems with some care, one BYTE per >VBI might be possible (if the synchronization is there). On the XL, XE's at least, the power suply generates DC voltage for the computer, and therefore is in no way synced in with the power line. Your best bet would be to use Pokey timer interupts. Max