FRAM71B

[Hans Brueggemann]

(01-24-2017 04:34 PM)Dave Frederickson Wrote:  Hi Hans,

How was I able to FREEPORT the device and load the 64k Data Acq Module into F-Blocks 0 & 1 without enabling SYSRAM Write (CN2-4)? Consider that I use ROMCOPY to load a ROM image into an IRAM and that I only use CN2-4 when POKEing an alternate O/S or the Diag ROM into SYSRAM.
http://hpmuseum.org/forum/thread-6287-po...l#pid63381

The LEDs on my modules are quite visible so I would have noticed if I had inadvertantly moved the jumper.

Regards Dave

i have no clue. when doing
POKE"2C000","909100"
OFF/ON
POKE"30000","CAFE"
PEEK$("30000",4),
the result is indeed "0000", as expected when CN2-4 is not set.
then,
set CN2-4
POKE"30000","CAFE"
clear CN2-4
PEEK$("30000",4),
gives "CAFE", again, as expected.
also, a FREEPORT(5) exits silently, but doesn't overwrite any contents in F_0x00000 and also doesn't reduce MEM. so, on my FRAM71B, CN2-4 seems to work as advertised.

i'm running HW105_V607 (like all FRAM71Bs out there). can you do a quick check with above code on your module? just switch over to TOP FRAM in order not to spoil your BOT configuration.