mirror of https://github.com/akuker/RASCSI.git
Updated Dayna Port Command Set (markdown)
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@ -42,7 +42,27 @@ Type: Input (Transitions to DATAOUT)
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Host then sends: `00 09 00 07 FF FF FF 00` (The last 00 might not actually be there?)
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Note: The AppleTalk broadcast address is 09:00:07:ff:ff:ff. So this command probably has something to do with setting up AppleTalk?
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Note: The AppleTalk broadcast address is 09:00:07:ff:ff:ff.
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This is probably configuring the Multicast Address Registers of the [DP83902A Ethernet receiver](./docs/DP83902A.pdf) inside the DaynaPort SCSI Link
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10.9 MULTICAST ADDRESS REGISTERS (MAR0 –MAR7)
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The multicast address registers provide filtering of multicast
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addresses hashed by the CRC logic. All destination addresses
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are fed through the CRC logic and as the last bit of the
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destination address enters the CRC, the 6 most significant bits
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of the CRC generator are latched. These 6 bits are then decoded
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by a 1 of 64 decode to index a unique filter bit (FB0 –63) in
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the multicast address registers. If the filter bit selected is
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set, the multicast packet is accepted. The system designer
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would use a program to determine which filter bits to set in
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the multicast registers. All multicast filter bits that
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correspond to multicast address accepted by the node are then
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set to one. To accept all multicast packets all of the
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registers are set to all ones.
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## Enable/disable Interface (0e)
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Command: 0e 00 00 00 00 XX (XX = 80 or 00)
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