MOS Technology was the birthplace of the venerable 6502 microprocessor, the VIC video chip, and the SID sound chip to name the really famous ones. It also brought us the TED Text Display chip ...

Now the Gigatron is emulating a 6502 processor, the same CPU found in the Apple II and almost every other retrocomputer that isn’t running a Z80. There’s a thread over on the Gigatron forums ...

Note 3: this assembler does NOT support the CMOS version of the 6502 only the MOS (original) version. Note 4: this assembler has NO macro facility. Note 5: a .org directive MUST be the first statemant ...

In the util/ folder are three scripts, used to generate the enums and arrays which encode information about the processor's instructions, opcodes, and operands. These are not necessary to run sixfive, ...

The first computers had a MOS Technology 6502 microprocessor running at 1.022,727 MHz, two game paddles, 4 KiB of RAM, and an audio cassette interface for data storage and program loading.

It was widely used in schools and home and manufactured up to 1994. Using an 8-bit 6502 microprocessor running at 1 MHz and an 8-bit bus, it ran the Apple DOS and ProDOS operating systems.

Merlin was a macroassembler developed by mathematics professor Glen Bredon, initially running on the Apple II family under DOS 3.3, for the 6502 processor. The product was published commercially ...