Re: II+ (amazing what you forget in 16 years!)

[david@uow.edu.au (David Wilson)]

dempson@actrix.gen.nz (David Empson) writes:
>It might not even do that.  I believe that the earliest motherboard
>revisions didn't even do a power-on reset, so you had to press the RESET
>key to get the monitor prompt after turning the machine on.  Oh how
>times have changed (thank goodness!)

This is true. This is also why the Disk ][ card has a reset generator
circuit on it so that if you have an old motherboard with an Autostart
monitor ROM and a Disk ][ you will have an autostarting system.

My OSI Challenger 1P also had no power up reset circuit. It also had the
fatal flaw of a reset key near other keys and not requiring control at the
same time. I added a little board someone else designed to require the reset
key to be held down for longer to cause a reset.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au