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Part #: 80387DX. Download. File Size: 444Kbytes. Page: 17 Pages. Description: Math Coprocessor. Manufacturer: Maxwell Technologies.
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- 80387DX
80387DX is a high-performance numerics processor that extends the 80386DX architecture with floating point, extended integer and BCD data types. The computing system fully conforms to the ANSI/IEEE floating-point standard. Using a numerics oriented architecture, the 80387DX adds over seventy mnemonics to the 80386DX instruction set, mak-
- Intel 8087
- Intel 80287
- Iit/Ulsi 2C87
- Intel 80387
- Cyrix 387DX
- Cyrix Fasmath Cx-83S87
- Cyrix Fasmath Cx-83D87 / 387Dx+
- IIT 3C87sx
- Iit/Ulsi 3C87
- IIT Xc87slc
The original Intel 8087 was the only coprocessor available for 8088- and 8086-based PCs. In fact it arrived 2 years before the IBM 5150 even went on the market, but up to that time, initial take-up of the chip had been very low. It came in three versions: 8087-5 (5 MHz), 8087-2 (8 MHz) and 8087-1 (10 MHz). The 10 MHz version could also work alongsi...
The Intel 80287 could work alongside an 80286 CPU to provide floating point operations. One advantage to the 80287 over the 8087 was its ability to run asynchronously from the main CPU - this means the clock speed the coprocessor runs at can be different to the CPU. Available in 5 MHz, 6 MHz, 8 MHz, 10 MHz and 12 MHz versions.Other fabricators such...
The 2C87 was a clone of the Intel 80287 introduced in 1989. It contained the full 387 instruction set. The 2C87 by IIT (also sold by ULSI) was available in these versions: 8, 10, 12, 16, 20 and 25 MHz. Performance-wise, the 2C87 is about the same as an Intel 80287XL clock for clock. The 2C87 initially sold for between $299 (10 MHz) and $379 (20 MHz...
The original math coprocessor for 80386DX CPUs. Performance benchmarks indicate this is between 10% and 25% slower than the competing 386DX-compatible coprocessors from Cyrix, ULSI and IIT. The 80387DX could happily run beside any 386DX from the original 16 MHz up to 33 MHz. Intel's own 80387-33 cost $994 in 1989.
The 387DX was Cyrix' first coprocessor for 80386 systems. It was pin-compatible with the Intel 80387 math coprocessor, and was soon replaced with the more advanced CX-83D87. It was released in 25 MHz, 33 and 40MHz versions.
The CX-83S87 was designed to complement 386SX-based systems and was available in 16, 20, 25, and 33 MHz variants. Like its big brother, CX-83D87, these were the fastest co-processors you could buy for 386 systems. Any CX-83S87s manufactured after 1991 got the 387+ internals. The CX-83S87 is designed to be used alongside the Cx486SLC CPU.
The CX-83D87 (called 387DX+ in Europe) was introduced in 1989. It is the fastest 387-compatible coprocessor, available in 25, 33, and 40MHz variants, and provides up to 50% more performance than the Intel 387DX clock for clock. The 83D87 also offers the most accurate transcendental functions of all coprocessors. It is the 387 clone with the highest...
The 3C87SX math coprocessor from IIT was designed to sit alongside a 386SX CPU, and came in 16, 20, 25, 33 and 40 MHz versions. They cost $439 for a 16 MHz version up to $779 for a 33 MHz version.
The 3C87 math coprocessor from IIT was designed to sit alongside a 386DX CPU, and came in 20, 25, 33 and 40 MHz versions. Performance-wise, the 3C87 is faster than the Intel 80387DX coprocessor. The 3C87 initially sold for between $499 (16 MHz) and $799 (25 MHz) at launch in August 1989.
The XC87SLC math coprocessor from IIT was designed to sit alongside a 486SX CPU, and came in 33 MHz version only.
Intel A80387DX-33 specifications. These specs can be used for short-term. listings on auction and classifieds sites. Click on this icon in the specs area. for more details and related links. Detailed side-by-side comparison.
The computing system fully conforms to the ANSI/IEEE floating-point standard. Using a numerics oriented architecture, the 80387DX adds over seventy mnemonics to the 80386DX instruction set, making the 80386DX/80387DX a complete solution for high-performance numerics processing.
- Maxwell Technologies
- Math Coprocessor
- Download 80387DX Datasheet
Mar 24, 2023 · The 80387 comes in two versions - 80387DX works with 80386DX processors, and 80387SX works with 80386SX CPUs. Die pictures: Cyrix CX-83D87-33-GP Intel A80387 ULSI 83C87DX-DLC-40. Use the filter below to display manufacturers that have specific feature (s) incorporated: Socket: PGA68 PLCC68. Technology: 1 micron 1.2 micron 1.5 micron.
Mar 31, 2022 · Featuring an 80386DX and 80387DX FPU alongside 128 kB of cache and a grand total of 32 MB of RAM, an OPTi chipset was used to connect with the rest of the system alongside the standard 8042-class...