Hi Joe, I haven't seen any online info yet, but here's some specifics in the memory map: demos & utilities ECHO, 04d7, input switches to output LEDs ANDGT, 04e0, ANDed input switches with outout CONV, 04f8, conveyer belt controller WTM, 053e, well tempered micro tones SORL, 055a, squirrel feedback shift register display ORGAN, 0599, keyboard tone generation ROCT, 05f9, rocket blastoff STW,0662, stopwatch SNAKE, 06c2, snake paddle game BEEP, 0010, beeps BEEP1, 0012, beeps using B for freq BEEP2, 0447, beeps B freq, D duration KIND, 014b, keyboard input to A KPU, 0185, scans keyboard, clears ZERO fl. if key is pushed SDS, 01c8, segment data from 0bfa-0bff sent to display DCD, 01e9, display codes from 0bf0-0bf5 to display STDM, 0018, six char message pointed by DE loaded into obf0-obf5 (for DCD) DELA, 0429, 1 ms. delay DELB, 0430, delay 1.ms x BC reg. pair RS1, 0008, software breakpoint monitor rom, 0000-07ff user program area, 0800-0aff user data storage and stack, 0b00-0bb0 monitor data storage, 0bb1-0bff input port, 2000 output port, 3000 ;) - Mike: dogas(a)bellsouth.net