BDS C (or the BD Software C Compiler) is a compiler for a sizeable subset of the C programming language, that ran on and generated code for the Intel 8080 and Zilog Z80 processors.
It was possible to write Intel 8080-based instructions directly into CADOL code by means of an "escape to ASM" instruction MACH, and return to CADOL with an "escape to CADOL" instruction MACH RETURN.
Doerr joined Intel Corporation in 1974 just as the firm was developing the 8080 8-bit microprocessor.
STOIC came with its own primitive but effective file system, and could be booted up with little preliminary work on any 8080-based microprocessor with 24K of memory and a Teletype machine.
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The most famous member of the 650x series was the 6502, developed in 1976, which was priced at 15 percent of the cost of an Intel 8080, and was subsequently used in many commercial products, including the Apple II, Commodore VIC-20, Nintendo Entertainment System, Atari 8-bit computers, Oric computers and BBC Micro from Acorn Computers.
The first commercial PC, the Altair 8800 (by MITS), used an Intel 8080 CPU with a clock rate of 2 MHz (2 million cycles/second).