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Working on programming AVR chips exposes a glaring omission in my first design of the SPI Relay: not allowing multiple devices make this task hard. I constantly have to unplug my SD card before, plug the AVR chip holder, then play a bit, then unplug the AVR holder, then replug the SD card... My prototype for a SPI relay design is built, but I haven't tested it yet. I need to adapt the code first, which is what I do here. When the prototype is tested, I'll update the SDC recipe with a new schema.
12 lines
388 B
Plaintext
12 lines
388 B
Plaintext
SD Card subsystem
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Load range: B423-B436
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This subsystem is designed for a ad-hoc adapter card that acts
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as a SPI relay between the z80 bus and the SD card. It requires
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a driver providing the SPI Relay protocol. You need to define
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SDC_DEVID to specify which ID will be supplied to (spie).
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Through that layer, this driver implements the SDC protocol
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allowing it to provide BLK@ and BLK!.
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