Changes
CRTC
,/* The Internal registers of the 6845 are */
|0||Horizontal Total||00000000||63||Width of the screen, in characters. Should always be 63 (64 characters). 1 character == 1μs.
|-
|1||Horizontal Displayed||00000000||40||Number of characters displayed. Once horizontal character count (HCC) matches this value, DISPTMG is set to 1.
|-
|2||Horizontal Sync Position||00000000||46||When to start the HSync signal.
|5||Vertical Total Adjust||xxx00000||0||Measured in scanlines, can be used for smooth vertical scrolling on CPC.
|-
|6||Vertical Displayed||x0000000||25||Height of displayed screen in characters. Once vertical character count (VCC) matches this value, DISPTMG is set to 1.
|-
|7||Vertical Sync position||x0000000||30||When to start the VSync signal, in characters.
