Changes
CRTC
,/* CRTC-II (aka Type 5) */
== CRTC-II (aka Type 5) ==
The [[Media:CRTC-5-HD6345.pdf|HD6345 datasheet]] states it is upward-compatible with the HD6845S in pin and software. And it brings these new features:*Screen Partition (horizontally split into 4 screens) with paging and scrolling for each screen*Smooth Scrolling in the vertical direction*External Synchronization in Master-Slave or TV Syne modes*Interrupt request by vertical blanking or light pen strobe detection*Double-size vertical display by Raster Interpolation*Sync Position Adjustment*Light Pen Raster Address*Second Hardware Cursor*Display Memory Width Setting*Up to 256 character rows per field*Programmable Timing Signal for dual-port RAM in MPRAM mode*Three-state Control of MA/RA Output
This chip was never used by Amstrad. However, some CPC enthusiasts have replaced the original CRTC chip in their CPC with this one.
