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A Weitek math coprocessor board that snapped on to a 6502 would be a fun project.
by sitkack 3y ago
A Weitek math coprocessor board that snapped on to a 6502 would be a fun project.
- pvg 3y agoI googled it up, it was a Bulgarian variant of this Am9511-based (the first FPU, according to AMD!) bad boy: http://www.apple-iigs.info/doc/fichiers/CCS%207781B%20Arithmetic%20Processor%20-%20Owner%20s%20Manual.pdf http://www.apple-iigs.info/doc/fichiers/CCS%207781B%20Arithm... https://www.applefritter.com/content/arithmetic-processor https://www.applefritter.com/content/arithmetic-processor
- sitkack 3y agoNice find! > "Apple APU. The Model 7811 B Arithmetic Processor Unit is intended to increase the execution speed of Applesoft II programs and the number of math functions available. The system employs an AMD9511 APU and plugs into one of the Apple expansion slots. The CCSoft interpreter is loaded from the diskette provided, and the system is ready to, go. The CCSoft interpreter is identical to Applesoft, except that CCSoft sends arithmetic functions to the APU for fast execution. Additional functions include AsiN(x), ACOS(X), LOGIO(X), SINIH(x), COSH(x), TANH(X), INVERSE(x) and PI. "