Difference between revisions of "OSBYTE &72"
m (moved OSBYTE 72 to OSBYTE &72) |
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| Line 1: | Line 1: | ||
[[Category:OSBYTE]] | [[Category:OSBYTE]] | ||
| − | OSBYTE &72 (114) - | + | OSBYTE &72 (114) - Specify video memory to use on next MODE change |
| − | X=0 force use of shadow memory on future | + | X=0 force use of shadow memory on future MODE changes |
| − | X=1 only use shadow memory if | + | X=1 only use shadow memory if MODE number is > 127 |
(Solidisk ROM/RAM Extension) | (Solidisk ROM/RAM Extension) | ||
X=255 never use shadow memory | X=255 never use shadow memory | ||
| + | |||
| + | This OSBYTE is called by the '''*SHADOW''' command on the BBC B+ and Master. | ||
==See Also== | ==See Also== | ||
| + | * [[OSBYTE &6C]] - Select Master shadow memory | ||
| + | * [[OSBYTE &6F]] - Select BBC B shadow memory | ||
| + | * [[OSBYTE &70]] - Select memory for Master VDU access | ||
| + | * [[OSBYTE &71]] - Select memory for Master video display | ||
| + | * [[OSBYTE &72]] - Select future use of shadow memory | ||
| + | * [[OSBYTE &73]] - Select shadow bank | ||
| + | * [[OSBYTE &74]] - Check for Solidisk shadow memory | ||
| + | * [[Paging in video memory]] | ||
* http://mdfs.net/Docs/Comp/BBC/Osbyte00 | * http://mdfs.net/Docs/Comp/BBC/Osbyte00 | ||
| − | [[User: | + | [[User:WikiSysop|WikiSysop]] 00:24, 29 August 2013 (BST) |
Revision as of 00:24, 29 August 2013
OSBYTE &72 (114) - Specify video memory to use on next MODE change
X=0 force use of shadow memory on future MODE changes
X=1 only use shadow memory if MODE number is > 127
(Solidisk ROM/RAM Extension)
X=255 never use shadow memory
This OSBYTE is called by the *SHADOW command on the BBC B+ and Master.
See Also
- OSBYTE &6C - Select Master shadow memory
- OSBYTE &6F - Select BBC B shadow memory
- OSBYTE &70 - Select memory for Master VDU access
- OSBYTE &71 - Select memory for Master video display
- OSBYTE &72 - Select future use of shadow memory
- OSBYTE &73 - Select shadow bank
- OSBYTE &74 - Check for Solidisk shadow memory
- Paging in video memory
- http://mdfs.net/Docs/Comp/BBC/Osbyte00
WikiSysop 00:24, 29 August 2013 (BST)
