AltairClone wrote:That should work as long as your 2SIOJP is new enough to have some of the front panel replacement features. This includes MWRITE generation, sense switches, and pull-up or two for a couple of bus signals driven from the front panel board.
Mike
Thanks Mike. I have a revision C 88-2SIOJP. My manual is dated 16 Aug 2016. It doesn't look like it generates the MWRITE. There's a reference to SMWRITE on page 15:
"The 88-2SIOJP blocks the SMEMR signal on the S-100 bus by asserting
the Status Disable signal, STSBn. While this signal is asserted, the
Altair CPU does not drive any of the 8 status signals. (These signals
are SINP, SOUT, SINTA, SMEMR, SWON, SHLTA, SSTACK, and SM1. Note that
SMWRITE is not on this list, as it is generated by the Altair front
panel.)"
I haven't used the 88-SIOJP in a while, but I seem to remember that I need to hit reset on my machine before it jumps into the monitor. I'll re-install it tomorrow and refresh my memory.
I've seen a reset button on the 9 slop backplane, could that not be used to do the jump start?