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Although the SPI Relay driver is RC2014-specific, the SD Card driver is generic enough to be a subsystem. That's the second subsystem we add and this warrants, I think, the formalization of a new concept: protocols.
13 lines
431 B
Plaintext
13 lines
431 B
Plaintext
SPI relay driver
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This driver is designed for a ad-hoc adapter card that acts as a
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SPI relay between the z80 bus and the SPI device. Sending any-
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thing on SPI_CSLOW and SPI_CSHIGH is expected to select/deselect
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the device, and writing to SPI_DATA is expected to initiate a
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byte exchange. The result of the exchange is excpected to be re-
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trieved by reading SPI_DATA.
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Provides the SPI relay protocol.
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Load driver with "596 LOAD".
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