Difference between revisions of "OSBYTE &49"
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[[Category:OSBYTE]] | [[Category:OSBYTE]] | ||
| − | OSBYTE &49 (73) - Integra-B calls | + | {{PageTitle|OSBYTE &49 (73) - Integra-B calls}} |
| − | |||
On entry: | On entry: | ||
X=&FF - returns X=&49 indicating Integra-B is present | X=&FF - returns X=&49 indicating Integra-B is present | ||
X<&FF - other calls | X<&FF - other calls | ||
| + | On exit: | ||
| + | X=&49 - called with X=&FF and Integra-B is present | ||
| + | X=&FF - call unsupported | ||
| + | |||
| + | ==See Also== | ||
| + | * [[OSBYTE &49]] - Check for Integra-B shadow memory | ||
| + | * [[OSBYTE &6C]] - Select Master/Integra-B shadow memory | ||
| + | * [[OSBYTE &6F]] - Select Aries/Watford 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 | ||
| + | ---- | ||
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 20:29, 3 April 2015 (UTC) | [[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 20:29, 3 April 2015 (UTC) | ||
Revision as of 20:50, 21 January 2021
OSBYTE &49 (73) - Integra-B calls
On entry:
X=&FF - returns X=&49 indicating Integra-B is present
X<&FF - other calls
On exit:
X=&49 - called with X=&FF and Integra-B is present
X=&FF - call unsupported
See Also
- OSBYTE &49 - Check for Integra-B shadow memory
- OSBYTE &6C - Select Master/Integra-B shadow memory
- OSBYTE &6F - Select Aries/Watford 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
