RAM - onboard RAM1 or RAM2
PSRAM - T_4.1 in EXTMEM
PROG - PJRC PCB Flash
SPI - all media and NOR and NAND under #ifdef
QSPI - NOR and NAND Flash under #ifdef
MRAMSPI - was MRAM specific for smaller size
Twin INO sketches per folder where 'media.INO' shows setup and loop() and globals/defines, second if common function.ini
RAM - onboard RAM1 or RAM2 PSRAM - T_4.1 in EXTMEM PROG - PJRC PCB Flash SPI - all media and NOR and NAND under #ifdef QSPI - NOR and NAND Flash under #ifdef MRAMSPI - was MRAM specific for smaller size
Twin INO sketches per folder where 'media.INO' shows setup and loop() and globals/defines, second if common function.ini