Machines › Computers › RCA › COSMAC ELF
COSMAC ELF
1976
RCA's 1976 build it yourself microcomputer built on the 1802, a famous Popular Electronics kit.
COSMAC ELF Online Emulator
Play COSMAC ELF using JavaScript directly in your browser.
Controls
Boots the Cosmac ELF with a demo already running: an 8-bit counter that increments and shows on the two 7-segment hex displays (OUT 4 latches the output). Use the debugger to single-step the 1802, set breakpoints on an address, or watch a memory cell for writes. To enter your own program, press LOAD, tap two hex keys to set a byte, then INPUT to deposit it and advance; press RUN to execute. On the physical keyboard: 0-9 A-F are the keypad, L = LOAD, R = RUN, I or Enter = INPUT.
Configurations
| Configuration | Emulator | Machine | OS | Legal | |
|---|---|---|---|---|---|
| Counter demo | COSMAC ELF | COSMAC ELF | open | Open ⛶ |
Chips
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| COSMAC ELF | online | Public domain | Website ↗ |