Apple II was the successor to the Apple 1 on which it was largely based. It was the very first commercial success of the Apple Computer Company.
Because Steve Wozniak wanted to demonstrate his Breakout game with the new Apple II, he decided to add colour, sound and minimum paddle support to the Apple 1's heir.
The Apple II came with 4 KB RAM, but it was possible to add 4 KB or 16 KB RAM chips. Thus, the system could have memory in the following sizes: 4K, 8K, 12K,16K, 20K, 24K, 32K, 36K, or a full 48K. This was one of the strong points of the Apple II: from the beginning, it was designed with expansion in mind. The 8 expansion slots were further proof of that - users could expand their system easily, just by plugging cards into the slots.
The ROM included the monitor, a 6502 disassembler, 'Sweet 16' a 16-bit CPU emulator and the Integer Basic written by Wozniak in machine language, assembled by hand on paper! Not having to load a language from tape or disk to start programing was also a significant advantage over competitors. Even the innovative plastic case proved to be an important feature to attract customers.
Just a few months after the Apple II presentation at the First West Coast Computer Fair in April 1977, Apple received about three hundred orders for the Apple II, over a hundred more than the total number of Apple-1's sold.
The Apple II was followed in 1979 by the Apple II+, which brought some enhancements.
Wozniak used the last bit in the video processor register to enable colour. Normally you would have needed at least 16kb to get four colours, the Apple would do it with just 4kb.
Unfortuneately, this meant that everything was based on multiples of 7 rather than 8, making it an absolute pig to program and very difficult to connect to the internet.
Friday 15th August 2014
My Chemistry teacher STILL uses it to simulate the effects of acids and bases.
Monday 6th February 2012
Nate (Ohio, US)
My neighbor authored a sound program for this machine that played "Oh Canada" with amazing clarity! I played it in class in high school ( 1980), and my teacher and class were in awe. Somewhere along the way, my Apple II+ failed, ruined the program and prevented me from getting a printout. My neighbor sold his machine over 20 years ago.
Friday 19th August 2011
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