Japanese
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★ INDEX ▲ | STN-46 | STN-47 | STN-48 | STN-49 | STN-50 | STN-51 | STN-52 ▼
STN-49
Restrictions regarding SCU/addition value register
issue number: | STN-49 |
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date of issue: | 96/11/07 |
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media: | ○Common | ○CD-ROM | ○Cartridge | ○Others |
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connection: | ○Program | ○Hard | ○Manual | ○Tools | ○Game | ○ Bug | ○Others |
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Information distinction: | ○New | ○Change | ○Addition |
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importance: | ○Strict observance | ○Recommended | ○Reference | ○Others |
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attached file: | ○No | ○ Yes |
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Subject supplement: | |
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Contents
■Restrictions
- Prohibition of SCU-DMA indirect mode transfer for CD block data transfer.
■Details
- Only 4-byte addition (DxRA=1) can be specified as the read address addition value in SCU-DMA indirect mode. Even in the A-Bus CS2 space, it is not possible to specify "Do not add (DxRA=0)".
However, this restriction does not exist for SCU-DMA direct mode.
- Reference: "HARDWARE MANUAL/SCU User's Manual"
Chapter 3 Register details ● Addition value register
that's all
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★ INDEX ▲ | STN-46 | STN-47 | STN-48 | STN-49 | STN-50 | STN-51 | STN-52 ▼
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