Changes
/* CRTC Registers */
=== CRTC Registers ===
The digitizer contains a CRTC chip (the same [[CRTC]] chip that is also used in the CPC itself). The CRTC chip in the Vidi is used as address generator for writing to & reading from capture 16K RAMSRAM. The CRTC registers are configured via Port F8B0h (index) and F8B1h (data). Usually set to following values:
crtc[00h] 75h or 50h ;horizontal total (-1)
