Here’s what passed for video games back in 1975. Today they work as a nice visual display for your Altair 8800 while it sits on the shelf… Step-by-Step: Step-by-Step:
After reading the January 1975 issue of Popular Electronics with the Altair 8800, Gates (then a 19 year-old sophomore at Harvard) contacted MITS to inform them that he and others were working on a BASIC interpreter for the platform. In reality, Gates and Allen did not have an Altair and had not written code for it; they merely wanted to … Read More
Another product of Bill Gates and Paul Allen. This version of BASIC was not loaded into RAM, leaving more memory available for programs. Step-by-Step: There are 50 BASIC programs available for you to load through the front panel switches. These programs include: To load a program, first clear any program that may be in memory by typing “NEW” and press … Read More
In 1975 Steve Dompier, member of Homebrew Computer Club, made a very memorable hardware hack on his newly built Altair 8800 computer. While interrogating its 72 function set, he noticed interference frequencies coming from the radio he was listening to. He noticed that a process occurring at a particular memory address would generate a specific frequency – for example memory … Read More
CP/M (Control Program for Microcomputers) is an operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc. It dominated personal computers from the mid 70’s into the early 80’s, and was dealt a killing blow when IBM decided to use PC-DOS (MS-DOS) as their default operating system. The last release of CP/M was in … Read More
Altair DOS 1.0 was announced in late 1975 when the Altair floppy disk system was released. However, it was not actually released until August of 1977. By then, CP/M had become the defacto operating system for Altair disk systems. Step-by-Step: In general, Altair DOS 1.0 was cryptic and non-intuitive. Turn on your Caps Lock, because Altair DOS doesn’t like lower-case.
VisiCalc was the first spreadsheet program, but was not available for CP/M. SuperCalc filled this void. It was originally bundled with WordStar, and became very popular for CP/M and eventually ported over to MS-DOS. It survived into the early 90’s when Microsoft Excel became the defacto spreadsheet program. Step-by-Step:
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