Apple  Apple III 
Previous System
Next System

Apple III

The Apple III was released by Apple Compute in 1980 as a business computer. It was the successor to the Apple II but failed to deliver. It featured a full 80-column display, a full-stroke keyboard with upper and lower case, ran on a Synertek 6502B processor at 1.8MHz and had 128KByte of RAM on board, upgradeable to 512KByte.

Because the Apple III failed to sell in large numbers, Apple reconsidered the plans to retire the Apple II, and instead took some of the features of the Apple III and incorporated them into later models of the Apple II

Apple III

MOS 6502 CPU

The 6502 is an 8-bit MicroProcessor designed by MOS Technology. The team was led by Chuck Peddle and had also worked on the Motorola 6800. The 6502 is a simplified, but faster and cheaper design than the 6800.

The 6502 was introduced in 1975 and was the cheapest microprocessor on the market. Together with the Zilog Z80, the 6502 helped start the home computer revolution of the 1980s. The 6502 was used in a wide range of devices: the Atari 2600, the 8-bit Atari home computers, the Apple II, the Nintendo Entertainment System, the Commodore 64, the BBC Micro and many others. All used the 6502 or a variation of it.

The 6502 is a 1MHz design, while the 6502A is designed for 2MHz. The 6502A is 100% compatible with the original 6502.

Commodore soon bought MOS Technology, but conitnued to sell the microprocessor to competitors and licensed the design to other manufacturers.

Source: WikiPedia - MOS Technology 6502
Technical Details
Released 1980 Brand Apple Type Apple Series III Name Apple III CPU Class 650x CPU Synertek 6502A @2MHz Memory RAM: 128kB
RAM max: 512kB
Sound Chip none Sound 1-bit speaker Display Chip none Display 80x48 16 colors
560x192 16 colors
Best Text 40x24 Best Color 16 colors, 16 intensities Best Graphics 560x192 in 16 colors, 16 intensities Sprites none System OS Apple SOS Storage Internal 5.25" Disk Drive Original Price $3495
Related Systems
Apple Series I
Apple Series II
Apple Series III
Apple III  (1980)
Apple Macintosh
Apple Macintosh II
Apple Macintosh LC & Quadra
Apple Newton
Related Media
6502 CPU
Collection of books on the 6502 and compatible CPUs
Apple Macintosh
Books about the Apple Macintosh, the first mass-market personal computer with a graphical user interface.
InCider and A+
InCider Magazine for Apple Computers, later fused with A+
The 6502/6809 Journal
Peeker Magazine
Peeker, a German language magazine for Apple Computer users.
World Wide Web Links
MOS 6502 CPU Wiki Page
The 6502 is an 8-bit MicroProcessor designed by MOS Technology.