Difference between revisions of "OSBYTE &74"
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Solidisk ROM/RAM Extension: | Solidisk ROM/RAM Extension: | ||
Determine shadow RAM system installed | Determine shadow RAM system installed | ||
| − | On exit: X='S' - Solidisk ROM/RAM extension | + | On exit: |
| − | + | X='S' - Solidisk ROM/RAM extension | |
| + | X=&FF - No shadow RAM or Acorn shadow RAM | ||
==See also== | ==See also== | ||
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* http://mdfs.net/Docs/Comp/BBC/Osbyte00 | * http://mdfs.net/Docs/Comp/BBC/Osbyte00 | ||
| − | [[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) | + | ---- |
| + | [[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 01:14, 4 April 2015 (UTC) | ||
Latest revision as of 19:28, 22 January 2021
OSBYTE &74 (116) - Reset internal sound system/Check for Solidisk RAM
Electron:
This call has no parameters, and resets the built-in sound system
Solidisk ROM/RAM Extension:
Determine shadow RAM system installed
On exit:
X='S' - Solidisk ROM/RAM extension
X=&FF - No shadow RAM or Acorn shadow RAM
See also
- OSBYTE &49 - Check for Integra-B shadow memory
- OSBYTE &6C - Select Master/Integra-B 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
