13 Aug
2016
13 Aug
'16
5:02 p.m.
I'd like a copy of the SDK-85 ROM also.
Those using an SDK-85 should be aware that there are at least two
different released monitor ROM versions, versions 1.2 and 2.1. The
RAM usage of the two is different! I wrote a program based on the
manual for one ROM version, and discovered that it wouldn't work on
the other, because the interrupts are vectored through different RAM
locations. In the later version, the vectors were moved to addresses
six bytes lower than in the earlier version, apparently to make an
additional six bytes of stack space available.