IBM CORPORATION SL-B, MT2133, MT2155, MT2168 Processor 80486SX/80487SX/ODP486/80486DX/80486DX2 Processor Speed 25/33/50(internal)/66(internal)MHz Chip Set Unidentified Video Chip Set Unidentified Maximum Onboard 64MB Memory Maximum Video 1MB Memory Cache 128/256KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VESA feature connector, VGA port, riser slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port J2 IDE interface LED J26/pins 3 & 4 Serial port 1 J3 Speaker J27 Serial port 2 J4 Soft off power J29 supply Parallel port J5 Soft off power J30 supply VGA port J6 Turbo switch J37 Floppy drive J7 Chassis fan power J38 interface IDE interface J9 Riser slot SL1 VESA feature J14 32-bit VESA local SL2 connector bus slot Power LED J26/pins 1 & 2 USER CONFIGURABLE SETTINGS Function Label Position » On board video disabled J15 Pins 1 & 2 closed On board video enabled J15 Pins 2 & 3 closed » Factory configured - do not J50 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 512K x None None None 36 4MB (1) 1M x 36 None None None 4MB (1) 512K x (1) 512K x None None 36 36 6MB (1) 1M x 36 (1) 512K x None None 36 6MB (1) 512K x (1) 512K x (1) 512K x None 36 36 36 8MB (1) 2M x 36 None None None 8MB (1) 1M x 36 (1) 512K x (1) 512K x None 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 8MB (1) 512K x (1) 512K x (1) 512K x (1) 512K x 36 36 36 36 10MB (1) 2M x 36 (1) 512K x None None 36 10MB (1) 1M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 12MB (1) 2M x 36 (1) 512K x (1) 512K x None 36 36 12MB (1) 2M x 36 (1) 1M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 14MB (1) 2M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 16MB (1) 4M x 36 None None None 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 18MB (1) 4M x 36 (1) 512K x None None 36 20MB (1) 4M x 36 (1) 512K x (1) 512K x None 36 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 22MB (1) 4M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 24MB (1) 4M x 36 (1) 2M x 36 None None 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 None 40MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 40MB (1) 2M x 36 (1) 8M x 36 None None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 56MB (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 None (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J12 J13 J16 J17 J51 128KB 2 & 3 1 & 2 2 & 3 1 & 2 1 & 2 256KB 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 Note: Pins designated should be in the closed position. VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 512KB 512KB None 1MB 512KB 512KB Note: The size of the video memory chips is unidentified. CPU TYPE SELECTION Type J24 J25 J31 80486SX Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed 80487SX Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed ODP486 Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed 80486DX Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed 80486DX2 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed