Peripheral 4 Register
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Revision as of 23:12, 20 December 2018 by wiki>Ped7g (Created page with "{{NextRegister |Number=$09 |Readable=Yes |Writable=Yes |ShortDesc=Sets scanlines, disables Kempston and divMMC ports. }} {| class="wikitable" ! Bit !! Function |- | 7-4 ||...")
| Number | $09 |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Sets scanlines, disables Kempston and divMMC ports. |
| Bit | Function |
|---|---|
| 7-4 | Reserved, must be 0 |
| 3 | Disables Kempston port ($DF) if set |
| 2 | Disables divMMC ports ($E3, $E7, $EB) if set |
| 1-0 | scanlines configuration (0 after a PoR or Hard-reset):
%00 = scanlines off, %01 = scanlines 75%, %10 = scanlines 50%, %11 = scanlines 25% |