FRAM71B

[Dave Frederickson]

(10-06-2016 04:53 AM)Sylvain Cote Wrote:  Assuming you have followed my guide, you should have the following configuration

PEEK$("2C000",32) -> "D3E4D5D69798191A1B1C9D0000000000"

I would suggest to modify it for the following

POKE("2C000","D3E4D5D69798991A1B1C9D0000000000") / power cycle

It appears that you've split main RAM into two modules by reconfiguring the F-Blocks. This is kind of like unplugging a module and plugging in different modules, but you didn't follow the rules for unplugging RAM modules, Para. 4.2.

Unconfiguring or “removing” a FRAM RAM module

1. When a RAM module is to be removed it is first converted to IRAM using the FREE PORT command. Some front-port modules, like the CMT 64K module, contained a battery that would maintain the IRAM contents. When it was later reinserted it would appear in the 71’s memory configuration as IRAM, complete with its contents. This happened to Forum member Mike in 2003 when CMT 64K module batteries still had a charge:
http://www.hpmuseum.org/cgi-sys/cgiwrap/...read=49425
Modules without a battery will lose their contents and reappear as main RAM. FRAM71/B can behave as either.
a. Battery-Backed: To unconfigure or “remove” a FRAM RAM module, first convert the module to IRAM using the FREEPORT command, then unconfigure the module by POKEing zeros into the appropriate location in the configuration string.
b. Non Battery-Backed: First, convert the module to IRAM. Determine the module’s address using MEMBUF. POKE <address>,”00000000”, which overwrites the module’s IRAM identifier, and unconfigure the module in the config string. The next time the module is configured it will be detected as unused memory and configured as RAM.

Dave