OVERVIEW

NanoLab 2 keeps the dual-board idea from NanoLab 1, but moves the CPU to an Arduino Nano R4. The GPU stays a classic Nano driving VGA text. Bigger buffer, SD file I/O, and two real BASIC dialects instead of one integer dialect.

WHAT IT CAN DO

Switch dialects: NL1 (integer 1.7) or NL2 (float BASIC)
NL2: floats, strings (A$), DIM, ELSE, WHILE, ON GOTO, STOP/CONT, logic ops, STR$/INSTR, BEEP/SOUND/PLAY, GET/INKEY$
NL1: classic integer mode with . / ? / ! aliases and TONE/TONEW
8 KB program buffer (was ~1 KB on NanoLab 1) and deeper FOR/GOSUB stacks
Load and save programs from microSD: LOAD, SAVE, FILES, CHAIN
Still has EEPROM tools: ELOAD, ESAVE, ECHAIN, ELIST, EFORMAT
PS/2 keyboard on the R4, USB serial separate from the GPU link
Same VGA text terminal feel — clear, color cycle, block graphics

HIGHLIGHTS

CPU: Arduino Nano R4 · GPU: Arduino Nano + VGAX
Separate keyword tables per dialect — not a thin overlay
SPI microSD on the CPU board
Boot password, memory bars, then the > prompt

Stack Nano R4 · Nano VGA · dual-mode BASIC
Input PS/2 keyboard · USB upload
Display VGA text GPU board
Language NL1 integer · NL2 float/string
Storage 8 KB buffer · SD · EEPROM