TANDY/RADIO SHACK 4100 MT Processor 80486SX/ODP486SX/80487SX/80486DX/80486DX2/ODP486DX2 Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set Unidentified Video Chip Set ATI Maximum 64MB Onboard Memory Maximum Video 2MB Memory Cache 64/256KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, VGA feature connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location IDE interface J22 Floppy drive interface J24 VGA feature connector J23 USER CONFIGURABLE SETTINGS Function Label Position On board video enabled SW1/1 Off On board video disabled SW1/1 On » Factory configured - do not alter SW1/2 Off » Factory configured - do not alter SW1/3 Off Password enabled SW1/4 Off Password disabled SW1/4 On Monitor type select color SW1/5 On Monitor type select monochrome SW1/5 Off » Factory configured - do not alter SW1/6 Off » Factory configured - do not alter SW1/7 Off Setup access enabled SW1/8 Off Setup access disabled SW1/8 On DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x None None None 36 2MB (1) 256K x (1) 256K x None None 36 36 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 None None None 5MB (1) 1M x 36 (1) 256K x None None 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x None 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x None 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 None None None 17MB (1) 4M x 36 (1) 256K x None None 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x None 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x None 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 25MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 None None 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x None 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 None 37MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 TAG 64KB (8) 8K x 8 (1) 8K x 8 256KB (8) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size E7 E8 64KB Open Open 256KB Closed Closed VIDEO MEMORY CONFIGURATION Note: Board accepts 512KB/2MB of video memory. The size of the chips are unidentified. The number of banks is unidentified. CPU TYPE SELECTION Type E9 E10 E11 E12 E13 80486SX Open 2 & 3 1 & 2 Open 2 & 3 ODP486SX 1 & 2 1 & 2 2 & 3 Closed 2 & 3 80487SX 1 & 2 1 & 2 2 & 3 Closed 2 & 3 80486DX 2 & 3 1 & 2 1 & 2 Closed 2 & 3 80486DX2 2 & 3 1 & 2 1 & 2 Closed 2 & 3 ODP486DX2 1 & 2 1 & 2 2 & 3 Closed 1 & 2 Note: Pins designated should be in the closed position.