nanook@rwing.UUCP (Robert Dinse) (11/27/90)
I've been told by several sources that the Tandy 6000 can address
a 3rd 3-port card although it's only officially supported for two.
I've been trying to get a 3rd 3-port card to work in my machine
and have had zero success. I've created device files with 0/10, 0/11,
and 0/12 for major/minor device numbers.
I have the address switches set on the card:
1 2 3 4 5 6 7 8
ON X X
The first card has just switch 1, the second just switch 2.
I have tried the stock z80ctl, didn't work. I've tried the z80ctl
that comes in the m6010.tar package, and the z80ctlmux. The last one
wouldn't work with the existing ports let alone address this card.
I remade the kernal. The symbol SZ80SER or something to that effect
is set to 13.
Can anyone give me a clue? Switch settings, etc?
Also, does anyone know if any kind of ethernet tcp/ip
hardware/software package is available for these machines? (I know,
dream on).yetsko@interlan.interlan.com (Mike Yetsko) (11/28/90)
I've put up to 4 3-port cards in a Tandy, just continue with the logical progressions on the switch settings. I think I had to do something kludgey with the software though, but it worked fine. There is a caveat with the boards though. The Z80 spec says you can only daisey chain 4 devices for EIN-EIO and have iterrupt arbitration work correctly and reliably. What you can do is wither modify the boards so that EIN is passed to EIOUT with a gate in parallel ored with the on-board signal to act as a fast 'look-ahead' or just put Z80B parts in for the CTCs in all the boards, as their signal propogation is faster on the enable interrupt passthrough. Sorry I can't get more specific, but it's been a LONG time since I did anything with a Tandy Model II series machine. Mike Yetsko