Peripheral 4 Setting Register: Difference between revisions
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Core 2.00.26 changes |
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|Readable=Yes | |Readable=Yes | ||
|Writable=Yes | |Writable=Yes | ||
|ShortDesc=Sets scanlines, AY mono output, disables Kempston and divMMC ports. | |ShortDesc=Sets scanlines, AY mono output, Sprite-id lockstep, disables Kempston and divMMC ports. | ||
}} | }} | ||
{| class="wikitable" | {| class="wikitable" | ||
Revision as of 08:33, 27 January 2019
| Number | TBRegisterNumber::$09 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Sets scanlines, AY mono output, Sprite-id lockstep, disables Kempston and divMMC ports. |
| Bit | Function |
|---|---|
| 7 | Enables AY2 "mono" output (A+B+C is sent to both R and L channels, makes it a bit louder than stereo mode). |
| 6 | Enables AY1 "mono" output (1 = mono, 0 default) |
| 5 | Enables AY0 "mono" output |
| 4 | Sprite id lockstep (1 = {{#ask:
TBRegisterNumber::$34 }} ($34) and {{#ask: PortNumber::$303B }} ($303B{{#ask: PortNumber::$303B |mainlabel=- |headers=hide |intro= / |?NumberDec#- }}) are in lockstep, 0 default) |
| 3 | Disables Kempston mouse port ($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% |