14 Aug
2019
14 Aug
'19
8:25 a.m.
On 8/14/2019 10:17 AM, Noel Chiappa via cctalk wrote:
Everyone was right about what I was experiencing.? It was BEVNT/LTC.?
The front panel switches on the BA11-M I have read:
[HALT]? [RESTART] [AUX ON/OFF]
and I can't turn off the LTC from the front panel.? I had to set a
switch on the BDV11 to disable BEVNT and with that XXDP booted up.?
Version 2.6.
Would like to run the RXV21 diagnostics since I have a 2nd controller
that fails to work with the RX02 emulator.
Doug
From: Paul
Koning
Isn't the interrupt disabled by RESET?
Nope. On the -11/03 and KDF11-A, BEVNT is wired straight into the CPU, and
there's no internal register to control it.
The BDV11 does have a register which can enable/disable the LTC (it connects
BEVNT to ground via a transistor when the appropriate register bit is
cleared); but, ironically (given your question), BINIT/RESET does _not_ clear
that register! Only BPOK does. (My theory is they were short of a bus receiver
for BINIT, and rather than put a whole extra chip on the card...) So, once on,
it has to be explicitly turned off, or the 'boot' switch (which toggles BPOK)
has to be hit.
The KDF11-B and all KDJ11 machines do have the LTC register, which operates
'correctly'.
Noel