Difference between revisions of "Timex Sinclair Video Mode Control"
From SpecNext official Wiki
| Line 1: | Line 1: | ||
{{Port | {{Port | ||
|Number=$xxFF | |Number=$xxFF | ||
| − | |PortMask=%-------- | + | |PortMask=%---- ---- 1111 1111 |
|ShortDesc=Controls Timex Sinclair video modes and colours in hi-res mode. | |ShortDesc=Controls Timex Sinclair video modes and colours in hi-res mode. | ||
|Readable=No | |Readable=No | ||
Revision as of 16:52, 28 August 2017
| Number | $xxFF |
|---|---|
| Decimal | |
| Short desc. | Controls Timex Sinclair video modes and colours in hi-res mode. |
| Bit Mask | %---- ---- 1111 1111 |
| Readable | No |
| Writable | Yes |
| Subsystem | Enhanced ULA |
| Bit | Function |
|---|---|
| 0-2 | 000=Screen 0. 001=Screen 1. 010=Hi-colour. 110=Hi-res. |
| 3-5 | Sets screen color combination for hi-res mode. |
| 6 | Disables interrupts. Does the same as DI, but cannot be turned on again with EI. Use with caution! |
| 7 | Used for memory paging on the Timex Sinclair, not relevant on the Next. |