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| | [[Category:OSWORD]] | | [[Category:OSWORD]] |
| − | {{PageTitle|OSWORD &99 (153) Perform BeebLink request}} | + | {{PageTitle|OSWORD &99 (153) Blitter control}} |
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| − | On entry:
| + | Versions of BeebLink before Feb 2024 respond to this call, since renumbered: [[OSWORD &9A|&9A 154]] |
| − | XY?0 =inward control block size
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| − | XY?1 =returned control block size
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| − | XY?2 =request code, or &00 for ROM presence check
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| − | XY?3 =&00
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| − | XY?4 =&00
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| − | XY?5 =&00
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| − | XY!6 =address of request payload
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| − | XY!10 =size of request payload
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| − | XY!14 =address for response payload
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| − | XY!18 =max size of response payload
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| − | On exit:
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| − | XY?3 =response code (never &00), or &FF on error
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| − | XY?5 =FS ID of BeebLink ROM that handled the request
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| − | XY!18 =total size of response payload
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| − | Addresses are 32-bit addresses, same as [[OSFILE]] and so on.
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| − | If the response payload total size is greater than the max size, the payload was truncated. (In this case, the max number of bytes were stored, but the rest were discarded.)
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| − | Latest docs for this call can be found on GitHub: https://github.com/tom-seddon/beeblink/blob/master/docs/tech.md#new-osword-call
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Latest revision as of 18:36, 27 January 2024
OSWORD &99 (153) Blitter control
Versions of BeebLink before Feb 2024 respond to this call, since renumbered: &9A 154
