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★ PROGRAMMER'S GUIDE ★ Stream system library
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stream system library

Appendix A

Additional information

A.1 Specification changes after stream system Ver.1.10

(1) Transfer settings

In Ver.1.01 and earlier, when setting the transfer area → registering the transfer function → deleting the transfer function, the next transfer destination was the first registered transfer area. However, with Ver.1.10 or later, it is necessary to reconfigure the transfer area. Additionally, the maximum number of transfer sectors and transfer mode will return to their default states.

(2) Handling of various files

All files on CD-ROM, virtual CD, SIMM, and SCSI can be handled with sega_stm.lib. However, you need to use different file system libraries to link with.

A.2 Notes

(1) A-Bus access prohibited during SCU-DMA transfer

When the transfer mode is STM_TR_SCU or when SCU-DMA is started with a transfer function, only the following functions can be used during transfer processing. Use of other functions is prohibited.

For more information, please refer to the following document:
Developer's Information STN-10 "Restrictions and precautions due to SCU specification changes"
No.08 “Prohibition of access to A-Bus and B-Bus from the CPU during A-Bus←→B-Bus DMA operation”

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★ PROGRAMMER'S GUIDE ★ Stream system library
Copyright SEGA ENTERPRISES, LTD., 1997