AT & T, INC. AT & T, INC. GLOBALYST 550 AT & T, INC. GLOBALYST 575 Processor SL80486SX/SL80486SX2/SL80486DX2/SL80486DX4/P24C/ 486Overdrive Processor Speed 33/50(internal)/66(internal)100(internal)MHz Chip Set Unidentified Video Chip Set S3 Maximum Onboard 128MB Memory Maximum Video 2MB Memory Cache 256KB BIOS IBM Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, cache slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN2 IDE interface 1 CN9 Serial port CN3 Front panel security JSEC switch Serial port CN4 Speaker JSPR Parallel port CN5 Front panel LEDs LED VGA port CN6 Riser slot SL1 Floppy drive CN7 Cache slot SL2 interface IDE interface 2 CN8 USER CONFIGURABLE SETTINGS Function Label Position Jumper information unavailable CN1 Unidentified Monitor type select color SW1/2 Off Monitor type select monochrome SW1/2 On Note: If a VGA processor is enabled, SW1/2 has no function. If the VGA controller is disabled, and a CGA or MDA controller is installed, set the switch to the above setting. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 8MB (1) 2M x 36 None None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 12MB (1) 1M 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 16MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 4M x 36 None None None 20MB (1) 1M x 36 (1) 4M x 36 None None 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 None 28MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 28MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 Note: The location of banks 0, 1, 2, & 3 are unidentified. This table is for the Globalyst 550 system and early revisions of Globalyst 575 systems. DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 Bank 2 Bank 3 32MB (1) 4M x 36 (1) 4M x 36 None None 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 None 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 52MB (1) 1M 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 Note: The location of banks 0, 1, 2, & 3 are unidentified. This table is for the Globalyst 550 system and early revisions of Globalyst 575 systems. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 8MB (1) 2M x 36 None None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 12MB (1) 1M 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 16MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 4M x 36 None None None 20MB (1) 1M x 36 (1) 4M x 36 None None 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 None 28MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 28MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 8M x 36 None None None 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 None 36MB (1) 1M x 36 (1) 8M x 36 None None 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 48MB (1) 4M x 36 (1) 8M x 36 None None 52MB (1) 1M 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 64MB (1) 8M x 36 (1) 8M x 36 None None 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 None Note: The location of banks 0, 1, 2, & 3 are unidentified. This table is for the Globalyst 575 system revisions released after the end of 1994.. DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 Bank 2 Bank 3 80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 None 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 None 100MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 112MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 Note: The location of banks 0, 1, 2, & 3 are unidentified. This table is for the Globalyst 575 system revisions released after the end of 1994.. CACHE CONFIGURATION Size SL2 None Not installed 256KB 256KB module installed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 1MB 1MB None 2MB 1MB 1MB Note: Bank 0 is factory installed and is not configurable. The size of the upgrade ships are unidentified. CPU SPEED SELECTION Speed SW1/1 33MHz Off 50iMHz On 66iMHz Off 100iMHz Off CPU TYPE SELECTION Type J53V 1 Pins 1 & 2 closed 2 Pins 5 & 6 closed Note: This jumper set the 3.3v for the P24C CPU. Type 1 & 2 are unidentified.