71B EPROM Programming

[rprosperi]

(01-30-2018 08:38 PM)Dave Frederickson Wrote:  

(01-30-2018 08:03 PM)rprosperi Wrote:  Except on FRAM-equipped 71B machines, IRAM contents are typically lost when a MEM LOST occurs (depends on why) so keeping ML in an IRAM won't help, as it won't be available when the JPC ROM poll tries to call it.

An IRAM should protect against an INIT 3 and is where the JPC ROM manual suggests putting the file if not in an EPROM.

I know that, and you know that, but the 71B doesn't always know that...

Key word here is 'should'. I suspect the IRAM contents will survive an INIT 3 every time; it's just the real genuine crashing-style MEM LOST conditions that can trash the IRAM contents. Still if there is no room in the EPROM, I surely agree it's better to put ML into an IRAM and hope it survives.