ULA Control Port: Difference between revisions
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Created page with "{{Port |Number=$xxFE |ShortDesc=Controls border color and base Spectrum audio settings. |Readable=No |Writable=Yes }} When written to, adjusts the border color and audio devic..." |
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|Number=$xxFE | |Number=$xxFE | ||
|ShortDesc=Controls border color and base Spectrum audio settings. | |ShortDesc=Controls border color and base Spectrum audio settings. | ||
|PortMask=%---- ---- ---- ---0 | |||
|Readable=No | |Readable=No | ||
|Writable=Yes | |Writable=Yes | ||
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When written to, adjusts the border color and audio devices as follows: | When written to, adjusts the border color and audio devices as follows: | ||
{| | {| class="wikitable" | ||
! Bit !! Function | ! Bit !! Function | ||
|- | |- | ||
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|} | |} | ||
Reading the port with certain particular high bytes will read the keyboard (see {{ | Reading the port with certain particular high bytes will read the keyboard (see {{PortRef:$**FE}}. Bit 6 of the ULA byte is always the EAR input. | ||
Revision as of 15:52, 29 August 2017
| Number | PortNumber::$xxFE |
|---|---|
| Decimal | NumberDec:: |
| Short desc. | ShortDesc::Controls border color and base Spectrum audio settings. |
| Bit Mask | PortMask::%---- ---- ---- ---0 |
| Readable | Readable::No |
| Writable | Writable::Yes |
| Subsystem | Subsystem:: |
When written to, adjusts the border color and audio devices as follows:
| Bit | Function |
|---|---|
| 0-2 | Border color |
| 3 | Enable MIC output |
| 4 | Enable EAR output |
| 5-7 | Unused |
Reading the port with certain particular high bytes will read the keyboard (see Template:PortRef:$**FE. Bit 6 of the ULA byte is always the EAR input.