Changes
CRTC
,/* Block Diagrams */
=== Motorola ===
[[File:Motorola CRTC Block Diagram.png]]
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== CRTC-II (aka Type 5) ==
According to the datasheet, the HD6345 is upward-compatible with the HD6845S in pin and software. And it brings these new features:
*Screen Partition (horizontally split into 4 screens)
*Smooth Scrolling
*External Synchronization
*Interrupt request
*Raster Interpolation
*Sync Position Adjustment
*Light Pen Raster Address
*Second Hardware Cursor
*Display Memory Width Setting
*256 Rows Max
*Timing Signal for MPRAM
*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.
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