ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º º º INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING º º º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ REPLACEMENT 8088 Any 8087 customer with a 4.77MHz 8088 showing '78 only as the date, can get a free replacement 8088. Contact Intel Customer Support for the replacement. NOTE: Only 4.77MHz 8088 chips will need to be upgraded. The 8088-2 & 8088-1 are OK. Chips containing copyrights by other manufacturers are also OK. 162 ERROR IN IBM PS/2 MODEL 50,60 & 80287-10 After inserting the 80287 chip into a Model 50 or 60, the system will give you a error "162". To eliminate the error message, boot to your computer's Reference and run IBM's setup program. You may use "Automatic" if you haven't changed the configuration on any add-in cards in your computer. 387DX & WEITEK SOCKETS Many computers contain with a square socket for a Weitek math coprocessor. This socket has three rows of holes on all four sides. In many computers, such as the Compaq 386, the inner two rows of pins are compatible with the Intel 387DX. This gives you the option of using an 387DX or the Weitek math coprocessor. However, if you want to install an 387DX in the Weitek socket, you must use EXTREME CAUTION to orient the chip correctly; otherwise you could damage the computer and the 387DX. Read your computer's User Guide to determine the correct procedure for installing the 387DX in your computer. The Installation Guide for the 387DX contains general information which may be useful also. If you have trouble figuring out how to correctly install the chip, have your dealer perform the installation for you. Intel can't replace a part which has been destroyed by incorrect installation. Some computers use the Weitek socket but DO NOT support the 387DX, such as the TANDY 4000. Contact your computer manufacturer or dealer for more specific information. ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ February 25, 1991 Intel FaxBack # 3062 Page 1 ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º º º INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING º º º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ (continued) ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ BURNED PIN ON 387DX Incorrect installation is the most common cause for burned pins on the 387DX. In addition to burning pins on the 387DX chip, you may also damage the socket and/or system board. In many computers, the 387DX is oriented differently from the other large chips. Carefully follow the manufacturer's installation instructions to avoid damaging the 387DX. The Intel warranty doesn't cover chips which were installed incorrectly. COMPAQ SYSTEM PROBLEMS If, after adding an Intel product (such as INBOARD, ABOVE BOARD or Math Coprocessor), your COMPAQ 286 computer begins to reboot itself automatically, it is usually a symptom of one of two problems: The connection between the power supply and the system board could be defective. The computer will continue to operate until either an additional burden is placed on the power supply, or enough oxide builds up to cause the failure. The cure for this is to vigorously reseat the connection. Be careful to not apply excessive force and break the connector or system board. The power supply could be taxed beyond it's capabilities. The only solution for this problem is to replace the power supply with a bigger one. IBM PS/2 MODEL 80 & 387DX & NOISE FROM SPEAKER Some of the 8580 Models 111 and 311 may generate noise through the computer's speaker (such as crakling or beeping) after a math coprocessor is installed. This is not caused by the Intel Math CoProcessor. It is a problem with the system board. The following machines can have the problem: 8580 Model 111, with serial numbers below 6019000 8580 Model 311, with serail numbers below 6502022 ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ February 25, 1991 Intel FaxBack # 3062 Page 2 ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º º º INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING º º º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ (continued) ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ IBM PS/2 MODEL 80 & 387DX & INTERMITTENT LOCKUPS The 8580 may hang under certain conditions. All 8580 models can be affected, but it will only appear under certain operating conditions. If the system is having this problem and does not a part number of p/n 33F8416 or p/n 33F8415 the system board should be replaced. The models 041 and 071 use the 33F8416, and models 111 and 311 use p/n 33F8415 as replacement system boards. INTEL MATH COPROCESSOR POWER CONSUMPTION ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ Intel Math ³ Maximum ³ Temperature extremes ³ ³ CoProcessor ³ Wattage ³ ³ ÆÍÍÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵ ³ 8087 ³ 3 watts ³ ³ ³ 80287 ³ 3 watts ³ 0 deg C to 85 deg C ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ³ 287XL ³ 1.5 watts ³ ³ ³ 387DX ³ 1.5 watts ³ -65 deg C to 110 deg C ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ³ 387SX ³ 1.5 watts ³ 0 deg C to 85 deg C ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ These are worst case estimates. Typical consumptions are somewhat less. For customers concerned about heat, the max operating temperature rating is much higher than what would ever be seen in a computer chassis. REMOVING 80287 FROM PC/AT (ERROR MESSAGE) After removing a math coprocessor from an IBM PC AT computer, you must rerun your computer's SETUP program. If you still receive an error message because the computer can't find the chip, you may have to temporarily unplug the battery from the system board. All SETUP information will be lost, so be sure to write down the hard drive type, floppy drive type, memory and video configurations before unplugging the battery. This information is critical in correctly reconfiguring your computer. ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ February 25, 1991 Intel FaxBack # 3062 Page 3