CRTC hardware differences
Revision as of 22:54, 6 November 2024 by WikiSysop (talk | contribs) (WikiSysop moved page CRTC hardware difference to CRTC hardware differences without leaving a redirect: typo)
Hardware differences
There are several slightly different versions of the 6845. The BBC series require a 6845S varient as the VDU drivers depend on certain functionality:
- R3 Vertical Sync.
- R6 Vertical Displayed any odd/even value, to set to 25 in MODE 3,6,7.
- R8 Character Delay and Cursor Delay timing for MODE 7.
