Difference between revisions of "OSBYTE &49"
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[[Category:OSBYTE]] | [[Category:OSBYTE]] | ||
| − | OSBYTE &49 (73) - Integra-B | + | {{PageTitle|OSBYTE &49 (73): Integra-B calls}} |
| + | On entry: | ||
| + | X=&FF - returns X=&49 indicating Integra-B is present | ||
| + | On exit: | ||
| + | X=&49 - Integra-B is present | ||
| + | X=&FF - call unsupported | ||
| + | |||
| + | On entry: | ||
| + | X=&FE - initialise alarm | ||
| + | On exit: | ||
| + | ??? | ||
| + | |||
| + | On entry: | ||
| + | X=%0000mmtt - update RTCUpdateOptions | ||
| + | Options are set to (oldOptions AND mm) EOR tt | ||
| + | b0=Alarm generates a User Event | ||
| + | b1=Alarm generates Service Call &49 | ||
| + | If the options are set to non-zero, the RTC interupt enable is updated | ||
| − | + | ==See Also== | |
| − | + | * [[OSWORD &49]] - Integra-B shadow memory calls | |
| − | + | * [[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) | ||
Latest revision as of 17:36, 30 November 2022
OSBYTE &49 (73): Integra-B calls
On entry:
X=&FF - returns X=&49 indicating Integra-B is present
On exit:
X=&49 - Integra-B is present
X=&FF - call unsupported
On entry:
X=&FE - initialise alarm
On exit:
???
On entry:
X=%0000mmtt - update RTCUpdateOptions
Options are set to (oldOptions AND mm) EOR tt
b0=Alarm generates a User Event
b1=Alarm generates Service Call &49
If the options are set to non-zero, the RTC interupt enable is updated
See Also
- OSWORD &49 - Integra-B shadow memory calls
- 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
