Like the 1541 and 1571, the 1581 has an on board MOS Technology 6502 CPU with its own ROM and RAM, and uses a serial version of the IEEE-488 interface.
Address decoding circuitry used with older processors like the 6502 or Z80 to divide up the processor's address space into RAM, ROM and I/O.
Lazer's Interactive Symbolic Assembler (Lisa) is an interactive MOS 6502 assembler for Apple II computers written by Randall Hyde in the late 1970s.
These I/O chips featured a pair of embedded 6502 CPUs, meaning that this Mac also had the core of two Apple II machines inside it (albeit at 10 MHz rather than the 1 MHz of the Apple II).
Massachusetts Institute of Technology | California Institute of Technology | Georgia Institute of Technology | Mos Def | Rochester Institute of Technology | Queensland University of Technology | technology | Royal Institute of Technology | Delft University of Technology | Vienna University of Technology | Norwegian University of Science and Technology | Information Technology | Illinois Institute of Technology | Technology | Information technology | National Institute of Standards and Technology | Monterrey Institute of Technology and Higher Education | List of Monterrey Institute of Technology and Higher Education faculty | information technology | Chalmers University of Technology | Stevens Institute of Technology | Seagate Technology | Warsaw University of Technology | Graz University of Technology | Indian Institutes of Technology | Swinburne University of Technology | Indian Institute of Technology Madras | Hong Kong University of Science and Technology | Sharif University of Technology | Helsinki University of Technology |
The hardware consists primarily of a standard MOS 6502 CPU, which executes the game program, and the Digital Vector Generator (DVG), vector processing circuitry developed by Atari themselves.
It was written in Commodore BASIC 2.0, with some speed-critical routines hand-coded in 6502 machine language; the BASIC portion was compiled with the Blitz! compiler.
Other well-known little-endian processor architectures are the 6502 (including 65802, 65C816), Z80 (including Z180, eZ80 etc.), MCS-48, 8051, DEC Alpha, Altera Nios II, Atmel AVR, VAX, and, largely, PDP-11.
The Sony SPC 700 is the S-SMP's integrated 8-bit CPU core manufactured by Sony with an instruction set similar to that of the MOS Technology 6502 (as used in the Commodore 64 and Vic 20, Apple II, BBC Micro and the original NES).
The HuC6280 8-bit microprocessor is Japanese company Hudson Soft's improved version of the WDC 65C02 CPU, an upgraded CMOS version of the popular NMOS-based MOS Technology 6502 8-bit CPU.