Difference between revisions of "OSBYTE &9B"
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(Write to VULA, not to 6845.) |
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OSBYTE &9B (155) - Write to Video ULA palette register and RAM copy | OSBYTE &9B (155) - Write to Video ULA palette register and RAM copy | ||
| − | This call | + | This call writes X to the Video ULA palette register and updates |
| − | + | the RAM copy. The RAM copy is of little use as there are 16 entries | |
| + | in the Video ULA palette and the RAM copy will only hold the last | ||
| + | value written to it. The RAM copy of the palette is in the VDU | ||
| + | workspace at &035F-&037E. | ||
| + | |||
| + | Electron OS: | ||
Completely ignored, performing an RTS immediately | Completely ignored, performing an RTS immediately | ||
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[[User:Jgharston|Jgharston]] 22:11, 26 May 2009 (UTC) | [[User:Jgharston|Jgharston]] 22:11, 26 May 2009 (UTC) | ||
| + | [[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 07:44, 30 November 2016 (UTC) | ||
Latest revision as of 08:44, 30 November 2016
OSBYTE &9B (155) - Write to Video ULA palette register and RAM copy
This call writes X to the Video ULA palette register and updates the RAM copy. The RAM copy is of little use as there are 16 entries in the Video ULA palette and the RAM copy will only hold the last value written to it. The RAM copy of the palette is in the VDU workspace at &035F-&037E.
Electron OS: Completely ignored, performing an RTS immediately
See Also
Jgharston 22:11, 26 May 2009 (UTC) Jgharston (talk) 07:44, 30 November 2016 (UTC)
