NORTHGATE COMPUTER SYSTEMS, INC. 486E Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/50/50(internal)/66(internal)MHz Chip Set OPTI Max. Onboard DRAM 128MB Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location IDE interface LED J4 & J5 pins Turbo LED J5 pins 8 & 18 10 & 20 Speaker J5 pins 1 - 4 Reset switch J5 pins 9 & 19 Turbo switch J5 pins 7 & 17 Power LED & J5 pins 11 - 15 keylock USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP5 Closed Monitor type select monochrome JP5 Open » EISA EXRDY to CHRDY conversion JP7 Open disabled EISA EXRDY to CHRDY conversion JP7 Closed enabled DRAM CONFIGURATION Size Bank 0 Bank 1 4MB (4) 1M x 9 NONE 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE 128MB (4) 16M x 9 (4) 16M x 9 Note:When upgrading to 128MB, you must increase the cache to 256KB. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG (U39) TAG (U41) TAG (U50) 64KB (4) 8K x (4) 8K x (1) 8K x 8 (1) 16K x (1) 16K x 8 8 1 1 128KB (4) 32K NONE (1) 8K x 8 (1) 16K x (1) 16K x x 8 1 1 256KB (4) 32K (4) 32K (1) 32K x (1) 16K x (1) 16K x x 8 x 8 8 1 1 CACHE JUMPER CONFIGURATION Size RNA1 RNA2 RNB1 RNB2 RNC1 RNC2 64KB Installed Installed Not Not Not Not installed installed installed installed 128KB Not Not Installed Installed Not Not installed installed installed installed 256KB Not Not Not Not Installed Installed installed installed installed installed CPU TYPE CONFIGURATION Type RBA RBB RBC W4 80486SX Installed Not installed Not installed Closed 80487SX Not installed Installed Not installed Open 80486DX Not installed Not installed Installed Open 80486DX2 Not installed Not installed Installed Open CPU SPEED CONFIGURATION Speed JP1 JP2 JP3 JP4 20MHz pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed closed 25MHz pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed closed 33MHz pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed closed 50iMHz pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed closed 50MHz pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed closed 66iMHz pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed closed