Pimoroni Pico Plus 2, PicoMite 6.01.00, PSRAM

PicoCalc
1

According to the latest PicoMite manual:

RP2350 with PSRAM enabled only
The RAM command allows access to up to 5 RAM program slots (similar to
flash slots). RAM slots survive a H/W and software reset but not a power
cycle.

Has anybody successfully used the RAM command with PSRAM on the Pimoroni Pico Plus 2 ? On my device the flash slots are empty after a restart (CPU RESTART) command.

2

I would like to have some feedback if possible but I suspect that this is an undocumented feature (aka bug) in 6.01.00.

The following was tested using the “official”, non-PicoCalc, images:

  • 6.00.01 does not support the ram command
  • 6.00.02 does support the ram command, initially all slots are used and survive a restart
  • 6.01.00 supports ram command, initially all slots are free but the contents does not survive a restart
3

The data stored in PSRAM is lost when the device is fully turned off or loses power. It’s almost like RAM

4

Not according to the documentation which shown in the first post.

Update: V6.00.02 (from Geoff's Projects - BASIC Interpreter for the Raspberry Pi Pico ) works as documented. Initially “RAM LIST” shows the slots “in use”, “RAM ERASE ALL” the slots change to “available”, after saving a program in RAM slot 1 followed by “CPU RESTART” the program in slot 1 survives. The same procedure with V6.01.00 fails.

2 Likes
5

I have to close this thread. The original author has noticed this problem and at this moment there is no update available that can be used to build a PicoCalc version.