[HECnet] TOPS-10 KS10 Ethernet Monitor

All true and good points. I'm curious on exactly how a DEUNA/DELUA works in a KS-10. Does anyone know? Does it do 8-bit-byte DMA to the 18-bit memory, leaving the top two bits alone. Or does it only work if it do word DMA (would be strange, as the controller itself can send and receive odd byte length ethernet packets). And how does the whole controller actually work in a KS, since the controller expects there to be control structures in memory, which are used to manage the buffers. Those are expected to be 16-bit fields at one address, and an additional 2 bits of address in another word. Is there some potential problem with regards to a PDP-11, which have two parity bits for data, which are used for actual data on a KS? (If I remember right.)

In short, this is not trivial, and if it works on a real machine, the emulation needs to reflect that truthfully, or else it will not be so useful. I suspect it should work on a real machine, as hints suggested that it was at least considered.

Johnny