Questions tagged [80387]
The 80387 tag has no usage guidance.
3
questions
7
votes
1answer
510 views
80387 transistor count
In 1985, Intel released the 80386, a particularly complex and sophisticated microprocessor for its day, consisting of 275,000 transistors, a rather large number for the day.
How many transistors went ...
3
votes
1answer
440 views
What is this socket for in 386 notebook motherboard
What is this socket for on 386 motherboard? I have no manual, no documentation and no resources readily available for this machine (Commodore C386SX-LT).
Source: Probably oldcrap.org
Close-up:
...
17
votes
3answers
2k views
x87 trigonometric instructions
The 8087 has instructions FPTAN and FPATAN, which are Partial Tangent and Partial Arctangent. The "partial" is presumably is to do with the range of the operands. For FPTAN the operand must be less ...