Lee_Hart

Just a few random comments from the designer... - All my kits are strictly 1980's vintage thru-hole parts. - No 4-layer; it's all plain old 2-layer, and with bigger traces and spaces than modern PCBs. -Early kits had the PC compatible parallel port. Current kits have a 6-digit 7-seg display instead (since no one seems to have parallel ports any more). - Even without an EPROM, a serial loader is only about 30 bytes. - The 1802 has built-in DMA; so if you add a UART, no software is needed for serial loading. - Mike Riley's 1802 diskless ELF/OS EPROM has a monitor, debugger, assembler, emulator, BASIC, VTL, FORTH, and lisp; all in just 32k. - The 1802 is still in production, but mainly in mil-spec (expensive) versions. But they're not hard to find on the surplus market. -- Lee Hart