AT & T MODEL 6386SX/EL20 (FM-0589-09) Processor 80386SX (exact location unidentified) Processor Speed 20MHz Chip Set Unidentified Video Chip Set None Maximum Onboard Memory 32MB Maximum Video Memory None Cache 16/32/64KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location VGA feature connector CN1 VGA port CN6 PS/2 mouse port CN2 Floppy drive interface CN7 Serial port CN3 IDE interface CN8 Serial port CN4 Riser slot SL1 Parallel port CN5 USER CONFIGURABLE SETTINGS Function Label Position » 16-bit video BIOS enabled SW1/3 Off 8-bit video BIOS enabled SW1/3 On » 16-bit video buffer enabled SW1/4 Off 8-bit video buffer enabled SW1/4 On » 1024 x 768 interlaced enabled SW1/5 On 1024 x 768 non interlaced enabled SW1/5 Off » On board video enabled SW1/8 On On board video disabled SW1/8 Off » Password normal operation W1 Pins 1 & 2 closed Password clear W1 Pins 2 & 3 closed » Factory configured - do not alter W2 Open » Monitor type select color W3 Closed Monitor type select monochrome W3 Open » Parallel port unidirectional W4 Closed Parallel port bidirectional W4 Open » PS/2 mouse IRQ12 enabled W5 Closed PS/2 mouse IRQ12 disabled W5 Open » Non volatile RAM normal operation W7 Open Non volatile RAM clear W7 Closed » Speaker type select onboard W10 Pins 1 & 2 closed Speaker type select offboard W10 Pins 2 & 3 closed » IDE interface LED enabled W11 Pins 2 & 3 closed IDE interface LED disabled W11 Pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (2) 256K x 9 (2) 256K x 9 None None 1.5MB (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 None 2MB (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 2MB (2) 1M x 9 None None None 2.5MB (2) 1M x 9 (2) 256K x 9 None None 3MB (2) 1M x 9 (2) 256K x 9 (2) 256K x 9 None 3.5MB (2) 1M x 9 (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 4MB (2) 1M x 9 (2) 1M x 9 None None DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 4.5MB (2) 1M x 9 (2) 1M x 9 (2) 256K x 9 None 5MB (2) 1M x 9 (2) 1M x 9 (2) 256K x 9 (2) 256K x 9 6MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 None 6.5MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 (2) 256K x 9 8MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 8MB (2) 4M x 9 None None None 8.5MB (2) 4M x 9 (2) 256K x 9 None None 9MB (2) 4M x 9 (2) 256K x 9 (2) 256K x 9 None 9.5MB (2) 4M x 9 (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 10MB (2) 4M x 9 (2) 1M x 9 None None 10.5MB (2) 4M x 9 (2) 1M x 9 (2) 256K x 9 None 11MB (2) 4M x 9 (2) 1M x 9 (2) 256K x 9 (2) 256K x 9 12MB (2) 4M x 9 (2) 1M x 9 (2) 1M x 9 None 12.5MB (2) 4M x 9 (2) 1M x 9 (2) 1M x 9 (2) 256K x 9 14MB (2) 4M x 9 (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 16MB (2) 4M x 9 (2) 4M x 9 None None 16.5MB (2) 4M x 9 (2) 4M x 9 (2) 256K x 9 None 17MB (2) 4M x 9 (2) 4M x 9 (2) 256K x 9 (2) 256K x 9 18MB (2) 4M x 9 (2) 4M x 9 (2) 1M x 9 None 18.5MB (2) 4M x 9 (2) 4M x 9 (2) 1M x 9 (2) 256K x 9 20MB (2) 4M x 9 (2) 4M x 9 (2) 1M x 9 (2) 1M x 9 32MB (2) 4M x 9 (2) 4M x 9 (2) 4M x 9 (2) 4M x 9 CACHE CONFIGURATION Size Bank 0 Bank 1 16KB (2) 8K x 8 None 32KB (2) 8K x 8 (2) 8K x 8 64KB (2) 32K x 8 None Note: The location of the cache is unidentified. CACHE JUMPER CONFIGURATION Size W9 16KB Pins 1 & 2 closed 32KB Pins 1 & 2 closed 64KB Pins 2 & 3 closed MCLK SELECTION Type SW1/6 SW1/7 » 41.612MHz On On 36.242MHz Off On 37.585MHz On Off 44.744MHz Off Off MONITOR SELECTION Setting SW1/1 SW1/2 » PS/2 VGA Off Off MDA On On AT VGA Off On CGA On Off