| MDFS::Info.Comp.BBC.Border | Search |
This is a small module the provides a programmable border
colour on the BBC computer. It is a small board that plugs into the Video
ULA socket and the Video ULA plugs into the module.
The flying lead taps into A1 mapping the border colour register to write-only location &FE22. b0-b2 are written with the RGB colour.
I haven't tried the module since I packed it away when moving back home from Watford in 1991.
| cdv2.gif | 46K | Version 2 circuit diagram |
| timing2.gif | 18K | Version 2 timing notes |
| cdv1a.gif | 36K | Version 1 circuit diagram |
| cdv1b.gif | 22K | Version 1 citcuit diagram |
| timing1.gif | 30K | Version 1 timing notes |
| wdv1.gif | 78K | Version 1 wiring diagram |
| notes1.gif | 53K | Notes |
| notes2.gif | 19K | Notes |
