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| | OSBYTE &71 (113) - Select Main/Shadow for Display hardware | | OSBYTE &71 (113) - Select Main/Shadow for Display hardware |
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| − | X=0 Use whatever the default for the current mode is
| + | Y=0 X=as per OSByte &70 |
| − | X=1 Use main memory
| + | The value of X defines which bank the hardware will output |
| − | X=2 Use shadow memory
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| − | (Risc OS 1.00)
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| − | The value of X can be greater than 2 as well, and instructs the video | |
| − | hardware to use the bank at screenbase+(X*modesize)
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| − | | |
| − | This call specifies which bank of memory the Master video display hardware
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| − | access. Using this and [[OSBYTE &70]] a program can use the VDU to write to
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| − | one bank of memory while the other is being displayed.
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| | ==See Also== | | ==See Also== |
| − | * [[OSBYTE &6C]] - Select Master shadow memory
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| − | * [[OSBYTE &6F]] - Select BBC B shadow memory
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| − | * [[OSBYTE &70]] - Select memory for Master VDU access
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| − | * [[OSBYTE &71]] - Select memory for Master video display
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| − | * [[OSBYTE &72]] - Select future use of shadow memory
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| − | * [[OSBYTE &73]] - Select shadow bank
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| − | * [[OSBYTE &74]] - Check for Solidisk shadow memory
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| − | * [[Paging in video memory]]
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| | * http://mdfs.net/Docs/Comp/BBC/Osbyte00 | | * http://mdfs.net/Docs/Comp/BBC/Osbyte00 |
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| − | [[User:WikiSysop|WikiSysop]] 00:24, 29 August 2013 (BST) | + | [[User:Jgharston|Jgharston]] 21:46, 26 May 2009 (UTC) |
Revision as of 01:13, 8 March 2015
OSBYTE &71 (113) - Select Main/Shadow for Display hardware
Y=0 X=as per OSByte &70
The value of X defines which bank the hardware will output
See Also
Jgharston 21:46, 26 May 2009 (UTC)
