★ INDEX ▲ | STN-46 | STN-47 | STN-48 | STN-49 | STN-50 | STN-51 | STN-52 ▼
STN-49
Restrictions on SCU / addition value register
issue number: | STN-49 |
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date of issue: | 96/11/07 |
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media: | ○ Communication | ○ CD-ROM | ○ Cartridge | ○ Other |
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connection: | ○ Program | ○ Hard | ○ Manual | ○ Tools | ○ Game | ○ Bug | ○ Other |
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Information distinction: | ○ New regulations | ○ Change | ○ Addition |
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importance: | ○ Strict adherence | ○ Recommendation | ○ Reference | ○ Other |
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Attachment: | ○ None | ○ Yes |
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Subject supplement: | |
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Contents
■ Restrictions
- Prohibition of transfer by SCU-DMA indirect mode for data transfer of CD block.
■ Details
- Only 4-byte addition (DxRA = 1) can be specified as the read address addition value in the indirect mode of SCU-DMA. Even in the CS2 space of A-Bus, "Do not add (DxRA = 0)" cannot be specified.
However, there is no such limitation for SCU-DMA direct mode. - reference:
- "HARDWARE MANUAL / SCU User's Manual"
Chapter 3 Register Details ● Addition value register
that's all
★ INDEX ▲ | STN-46 | STN-47 | STN-48 | STN-49 | STN-50 | STN-51 | STN-52 ▼
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