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Atomwide Acorn Ethernet III Podule (AEH54)

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sarah-walker-pcem edited this page Mar 27, 2022 · 3 revisions

Register description

IOC address map :
  0000-3fff - ROM (read)
              ROM page (write)

MEMC address map :
  0000-3fff - SEEQ 8005
              SEEQ A0 not connected (16-bit config)
              Arc A6-8 connected to SEEQ A1-3

Notes

Podule originally designed by Atomwide, later rebadged by Acorn.

The Ether3 driver performs a test on startup to detect whether the SEEQ 8005 is connected as 8 or 16 bit. This relies on byte writes replicating the byte written into all byte lanes; the Ethernet III uses the SEEQ in a 16 bit configuration so the written byte will be duplicated.

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