[FRAM71] Pre-Production Batch

[Sylvain Cote]

I have received my first FRAM71-1MB last week and I am starting to to play with it.

First session: deactivate all memory

Code:

BLOCK:               00112233445566778899AABBCCDDEEFF
POKE  "2C000",      "00000000000000000000000000000000"
PEEK$("2C000",32) ->"00000000000000001000101010101010" (where are those 1's coming from ?)
OFF/ON
PEEK$("2C000",32) ->"00000000000000001000101010101010" (still there ???)
MEM -> 16828 (memory size ok)
mmmm, trying another strategy to set the last 16 nibbles
POKE  "2C010",      "0000000000000000"
PEEK$("2C010",16) ->"1000101010101010" (nop! not working, very strange)

Second session: add 80KB of memory

Code:

BLOCK:               00112233445566778899AABBCCDDEEFF
POKE  "2C000",      "9394A500000000000000000000000000"
PEEK$("2C000",32) ->"9394A500000000001000101010101010" (again those 1's)
OFF/ON
PEEK$("2C000",32) ->"9394A500000000001000101010101010" (at least, it's consistent and does not appears to have side effects)
MEM -> 98768 (memory size ok, 16KB+80KB)

Third session: add 160KB of memory trying another strategy to set the last 16 nibbles

Code:

BLOCK:               00112233445566778899AABBCCDDEEFF
POKE  "2C000",      "A3A4A5A6A7A8A9AAABAC000000000000"
PEEK$("2C000",32) ->"A3A4A5A6A7A8A9AAABAC000000000000" (the 1's has disappears)
OFF/ON
PEEK$("2C000",32) ->"A3A4A5A6A7A8A9AAABAC000000000000"
MEM -> 180593 (memory size ok, 16KB + 160KB)

Fourth session: add 80KB of memory (same as second session and the 1's has also returned, very strange ...)

Code:

BLOCK:               00112233445566778899AABBCCDDEEFF
POKE  "2C000",      "9394A500000000000000000000000000"
PEEK$("2C000",32) ->"9394A500000000001000101010101010" (again those 1's)
OFF/ON
PEEK$("2C000",32) ->"9394A500000000001000101010101010" (yep! confirmed, still there)
MEM -> 98674 (memory size ok, 16KB+80KB)

Next time I will explore the FRAM71 behaviour with the FREE/CLAIM PORT.

Sylvain