name: 80C287 function: 80-Bit HMOS Numberic Processor Extensino package: 40 Pin-CerDIP,40 manufacturer: Intel added-by: Stephen Frick +--()--+ n/c | 1 40| n/c | 2 39| CKM n/c | 3 38| N/C n/c | 4 37| N/C D15 | 5 36| PEACK D14 | 6 35| RESET D13 | 7 34| NPS1 D12 | 8 33| NPS2 VCC | 9 32| CLK VSS |10 31| CMD1 D11 |11 30| VSS D10 |12 29| CMD0 N/C |13 28| NPWR D9 |14 27| NPRD D8 |15 26| ERROR D7 |16 25| BUSY D6 |17 24| N/c D5 |18 23| D0 D4 |19 22| D1 D3 |20 21| D2 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/