CONCORD OFFICE AUTOMATION INDUSTRIAL (HK) LTD. COA-921 Processor 80486SX/SL80486SX/UMC486DX/AM486DX/80486DX/SL80486DX/ CX486DX2/IBM486DX2/TI486DX2/UMC486DX2/AM486DX2/ 80486DX2/SL80486DX2/CX486DX4/IBM486DX4/AM486DX4/ (SL)AM486DX4/SL80486DX4/CXP24D/P24D/P24T/CX5X86 Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)/ Speed 120(internal)MHz Chip Set UMC Video Chip None Set Maximum 256MB Onboard Memory Maximum None Video Memory Cache 64/128/256/512KB BIOS Unidentified Dimensions 254mm x 218mm I/O 32-bit PCI slots (3), floppy drive interface, green PC connector, Options IDE interfaces (2), parallel port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Floppy drive interface CN1 IDE interface LED J29 Parallel port CN2 Turbo switch J30 Serial port CN3 Reset switch J31 Serial port CN4 Turbo LED J32 IDE interface 2 CN5 Speaker J33 IDE interface 1 CN6 Power LED & keylock J34 External battery J2 32-bit PCI slots PC1 - PC3 Green PC connector J10 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J1 Unidentified alter Battery type select external J2 Closed Battery type select internal J2 Pins 2 & 3 closed CMOS memory clear J2 Pins 3 & 4 closed » Factory configured - do not J5 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (1) 256K x 36 None 4MB (1) 1M x 36 None 8MB (1) 2M x 36 None 8MB (1) 1M x 36 (1) 1M x 36 12MB (1) 2M x 36 (1) 1M x 36 16MB (1) 4M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 20MB (1) 4M x 36 (1) 1M x 36 24MB (1) 4M x 36 (1) 2M x 36 32MB (1) 8M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 36MB (1) 8M x 36 (1) 1M x 36 40MB (1) 8M x 36 (1) 2M x 36 48MB (1) 8M x 36 (1) 4M x 36 64MB (1) 16M x 36 None 64MB (1) 8M x 36 (1) 8M x 36 68MB (1) 16M x 36 (1) 1M x 36 72MB (1) 16M x 36 (1) 2M x 36 80MB (1) 16M x 36 (1) 4M x 36 96MB (1) 16M x 36 (1) 8M x 36 128MB (1) 32M x 36 None 128MB (1) 16M x 36 (1) 16M x 36 DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 132MB (1) 32M x 36 (1) 1M x 36 136MB (1) 32M x 36 (1) 2M x 36 144MB (1) 32M x 36 (1) 4M x 36 160MB (1) 32M x 36 (1) 8M x 36 192MB (1) 32M x 36 (1) 16M x 36 256MB (1) 64M x 36 None 256MB (1) 32M x 36 (1) 32M x 36 CACHE CONFIGURATION Size Bank 0 TAG 64KB (4) 16K x 8 Unidentified 128KB (4) 32K x 8 Unidentified 256KB (4) 64K x 8 Unidentified 512KB (4) 128K x 8 Unidentified CPU SPEED SELECTION Speed J28 25MHz Pins 1 & 2 closed 33MHz Pins 1 & 2, 3 & 4, 5 & 6 closed 40MHz Pins 1 & 2, 3 & 4 closed 50iMHz Pins 1 & 2 closed 50MHz Pins 5 & 6 closed 66iMHz Pins 1 & 2, 3 & 4, 5 & 6 closed 75iMHz Pins 1 & 2 closed 80iMHz Pins 1 & 2, 3 & 4 closed 100iMHz Pins 1 & 2, 3 & 4, 5 & 6 closed 120iMHz Pins 1 & 2, 3 & 4 closed CPU TYPE SELECTION Type J6 J7 J12 J13 J14 J15 80486SX 1 & 1 & 2 Open 2 & 3 Open Open 2 SL80486SX 1 & 1 & 2 2 & 3, 2 & 3 Open Open 2 4 & 5 UMC486DX 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 AM486DX 1 & 2 & 3 Open 1 & 2, Open 3 & 4 2 3 & 4 80486DX 1 & 1 & 2 Open 1 & 2, Open 3 & 4 2 3 & 4 SL80486DX 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 CX486DX2 2 & 1 & 2 1 & 2, 1 & 2, 2 & 3 3 & 4 3 3 & 4 3 & 4 IBM486DX2 2 & 1 & 2 1 & 2, 1 & 2, 2 & 3 3 & 4 3 3 & 4 3 & 4 TI486DX2 2 & 1 & 2 1 & 2, 1 & 2, 2 & 3 3 & 4 3 3 & 4 3 & 4 UMC486DX2 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 AM486DX2 1 & 2 & 3 Open 1 & 2, Open 3 & 4 2 3 & 4 80486DX2 1 & 1 & 2 Open 1 & 2, Open 3 & 4 2 3 & 4 SL80486DX2 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 CX486DX4 2 & 1 & 2 1 & 2, 1 & 2, 2 & 3 3 & 4 3 3 & 4 3 & 4 IBM486DX4 2 & 1 & 2 1 & 2, 1 & 2, 2 & 3 3 & 4 3 3 & 4 3 & 4 AM486DX4 1 & 2 & 3 Open 1 & 2, Open 3 & 4 2 3 & 4 (SL)AM486DX4 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 SL80486DX4 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 CXP24D 2 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 3 4 & 5 3 & 4 P24D 1 & 1 & 2 2 & 3, 1 & 2, Open 3 & 4 2 4 & 5 3 & 4 P24T 1 & 1 & 2 2 & 3, 1 & 2, 1 & 2 2 & 3 2 4 & 5 3 & 4 CS5X86 1 & 1 & 2 1 & 2, 2 & 3, Open 3 & 4 2 3 & 4 4 & 5 Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON'T) Type J16 J17 J18 J19 80486SX 1 & 2 Open Open Open SL80486SX 3 & 4 Open Open Open UMC486DX 3 & 4 Open Open Open AM486DX 1 & 2 Open Open Open 80486DX 1 & 2 Open Open Open SL80486DX 3 & 4 Open Open Open CX486DX2 3 & 4 2 & 3 1 & 2 2 & 3 IBM486DX2 3 & 4 2 & 3 1 & 2 2 & 3 TI486DX2 3 & 4 2 & 3 1 & 2 2 & 3 UMC486DX2 3 & 4 Open Open Open AM486DX2 1 & 2 Open Open Open 80486DX2 1 & 2 Open Open Open SL80486DX2 3 & 4 Open Open Open CX486DX4 3 & 4 2 & 3 1 & 2 Open IBM486DX4 3 & 4 2 & 3 1 & 2 Open AM486DX4 1 & 2 Open Open Open (SL)AM486DX4 3 & 4 Open Open Open SL80486DX4 3 & 4 Open Open Open CXP24D 3 & 4 Open Open Open P24D 3 & 4 Open Open Open P24T 3 & 4, 5 & 1 & 2 2 & 3 Open 6 CS5X86 3 & 4 Open Open Open Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON'T) Type J20 J21 J22 J23 J24 80486SX Open Open Open Open Open SL80486SX 1 & 2 Open Open 1 & 2 Open UMC486DX 1 & 2 2 & 3 Open 1 & 2 Open AM486DX Open Open Open Open Open 80486DX Open Open Open Open Open SL80486DX 1 & 2 2 & 3 Open 1 & 2 Open CX486DX2 2 & 3 Open Open 1 & 2 Open IBM486DX2 2 & 3 Open Open 1 & 2 Open TI486DX2 2 & 3 Open Open 1 & 2 Open UMC486DX2 1 & 2 2 & 3 Open 1 & 2 Open AM486DX2 Open Open Open Open Open 80486DX2 Open Open Open Open Open SL80486DX2 1 & 2 2 & 3 Open 1 & 2 Open CX486DX4 2 & 3 Open Open 1 & 2 Open IBM486DX4 2 & 3 Open Open 1 & 2 Open AM486DX4 Open Open Open Open Open (SL)AM486DX4 1 & 2 Open 2 & 3 1 & 2 Closed SL80486DX4 1 & 2 Open Open 1 & 2 Open CXP24D 1 & 2 Open 2 & 3 1 & 2 Closed P24D 1 & 2 2 & 3 2 & 3 1 & 2 Closed P24T 1 & 2 2 & 3 Open 1 & 2 Open CS5X86 1 & 2 Open 2 & 3 1 & 2 Closed Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON'T) Type J25 J26 J27 J36 80486SX Open Open Open Closed SL80486SX Open Open Open Open UMC486DX Open Open Open Open AM486DX Open Open Open Closed 80486DX Open Open Open Closed SL80486DX Open Open Open Open CX486DX2 Open Open Open Open IBM486DX2 Open Open Open Open TI486DX2 Open Open Open Open UMC486DX2 Open Open Open Open AM486DX2 Open Open Open Closed 80486DX2 Open Open Open Closed SL80486DX2 Open Open Open Open CX486DX4 Open Open Closed Open IBM486DX4 Open Open Closed Open AM486DX4 Open Open Open Closed (SL)AM486DX4 Closed Closed Open Open SL80486DX4 Open Open Open Open CXP24D Closed Closed Closed Open P24D Closed Closed Open Open P24T Open Open Open Open CS5X86 Closed Closed Closed Open CPU VOLTAGE SELECTION Voltage J8 J9 J11 J35 3.3v Pins 2 & 3 Pins 2 & 3 Closed Pins 2 & 3 closed closed closed 4v Pins 2 & 3 Pins 2 & 3 Open Pins 2 & 3 closed closed closed 5v Pins 1 & 2 Pins 1 & 2 Closed Pins 1 & 2 closed closed closed DMA CHANNEL SELECTION Channel J3 J4 1 Pins 1 & 2 closed Pins 1 & 2 closed 3 Pins 2 & 3 closed Pins 2 & 3 closed