Appearance: New In BoxFunctionality: WorkingDescription:============As pictured, a BioStarMB-8500TUC Socket7 Baby AT Motherboard. Includes everything pictured and testedgood with a PCI video card. Can include IDE, Floppy, COM, and Printer cables (notsure how compatible the COM/Printer would be with this system) – just leave anote at checkout.Can configure asdesired with CPU, RAM, and Video Cards – please contact us.Warranty andReturns:=====================We understand thatthere may be compatibility issues, space constraints, or it just doesn’t lookperfect. This item can be returned within 14-days for ANY reason. However,shipping to and from is not refundable. Shipping:=========- Local pickup isalso available at no cost.- Most orders placedbefore 9am will ship the same day.About Us:=========The ComputerPreservation Group is dedicated to the preservation of historical computers. Tohelp fund ongoing operations, select items are made available.Thank you for your support!Stock#:15354JP5 Cache RAM SizeSelectOpen: 256KB Closed:512KB Cache RAM &Cache Module CombinationSRAMSizeLocate Cache RAMCacheModule Tag RAMCacheable MainMemory (MB) (U1,U2) (U4,U5) BSL1U15 256KB -- (32K x 32)x 2pcs -- (8K x 8)x1pcs 64 512KB (32K x 32)x 2pcs (32K x 32)x 2pcs -- (32K x 8)x 1pcs 64 512KB -- (32K x 32)x 2pcs 256K modulex 1pcs (8K x 8)x1pcs 64 JP10 Flash ROM TypeVoltage Select1-2 closed:+12V typeFlash Memory 2-3 closed+5V type Flash Memory open: EPROM used, orOV type FLASH ROM JP11 CMOS FunctionSelectopen To maintain set upand extended setup data in CMOS for normal functioning.closed To clear CMOS setupmemory. If there has been any inappropriate operation incurring the system isfailure.CPUInstallation/Jumpers Setting (click here for diagram)CPU Type Select (forPCB V:1)CPU Type JP6 JP9JP15 Remark INTELP54C/CQS/CTCyrix 6x86AMDK5 1-2,4-5closed 2-3,4-5,7-8,9-10closed open 3.4V INTELP55C/CT 2-3,5-6closed 1-2,3-4,6-7,8-9closed closed3.4V/2.5V JP14 CPUVoltage-level SelectJP14 open = 3.5V,closed = 3.4V*Intel CPU StandardSpec: 3.135V - 3.365VVR Spec: 3.300V -3.465VVRE Spec: 3.450V -3.600V*Cyrix 6x86 Spec:3.150V - 3.600V*AMDK5 Spec: 3.300V- 3.600V* Please consult CPUSPEC with your CPU dealer. JP4,JP7 CPU ClockSelect (click here for diagram)CPUSpeed Bus Clock& Multiplier JP4(1-2) JP4(3-4) JP7(1-2) JP7(3-4) 75MHz 50 MHz x 1.5closed closed open open 90MHz 60 MHz x 1.5open closed open open 100MHz 66 MHz x 1.5closed open open open 120MHz 60 MHz x 2open closed closed open 133MHz 66 MHz x 2closed open closed open 150MHz 60 MHz x 2.5open closed closed closed 166MHz 66 MHz x 2.5closed open closed closed 180MHz 60 MHz x 3open closed open closed 200MHz 66 MHz x 3closed open open closed *JP4(1-2) closed& (3-4) closed: Bus Clock = 50MHz*JP4(1-2) open &(3-4) closed: Bus Clock = 60MHz*JP4(1-2) closed& (3-4) open: Bus Clock = 66MHz*JP7(1-2) open &(3-4) open: Multiplier = 1.5*JP7(1-2) closed& (3-4) open: Multiplier = 2*JP7(1-2) closed& (3-4) closed: Multiplier = 2.5*JP7(1-2) open &(3-4) closed: Multiplier = 3 Cyrix 6x86 CPUCPU Speed Bus Clock& Multiplier JP4(1-2) JP4(3-4) JP7(1-2) JP7(3-4) P-120100MHz 50MHz x 2closed closed Note** open P-133110MHz 55MHz x 2open open Note** open P-150120MHz 60MHz x 2open closed Note** open P-166133MHz 66MHz x 2closed open Note** open *JP4(1-2) closed& (3-4) closed: Bus Clock = 50MHz*JP4(1-2) open &(3-4) open: Bus Clock = 55MHz*JP4(1-2) open &(3-4) closed: Bus Clock = 60MHz*JP4(1-2) closed& (3-4) open: Bus Clock = 66MHz**JP7(1-2) open& (304) open: Multiplier =2 for P.C.Bversion is"MB-8500TUC-A Ver 3.1" and previous.**JP7(1-2) closed& (3-4) open: Multiplier = 2 for P.C.B version is"MB-8500TUC-A Ver 3.2" and afterwards. AMD-K5 CPUCPU P-rating& Speed BusClock& Multiplier JP4(1-2) JP4(3-4) JP7(1-2) JP7(3-4) PR-7575MHz 50MHz x 1.5closed closed open open PR-9090MHz 60MHz x 1.5open closed open open PR-100100MHz 66MHz x 1.5closed open open open PR-12090MHz 60MHz x 1.5open closed open open PR-133100MHz 66MHz x 1.5closed open open open PR-166133MHz 66MHz x 2closed open closed closed *JP4(1-2) closed& (3-4) closed: Bus Clock = 50MHz*JP4(1-2) open &(3-4) closed: Bus Clock = 60MHz*JP4(1-2) closed& (3-4) open: Bus Clock = 66MHz*JP7(1-2) open &(3-4) open: Multiplier = 1.5*JP7(1-2) closed& (3-4) closed: Multiplier = 2 J13 ConnectorPinNo. AssignmentFunction PinNo. AssignmentFunction 1 Speaker SpeakerConnector 14 NC NC 2 NC 15 NC 3 Ground 16 NoConnection 4 VCC 17 GreenControl GreenSwitch 5 Power LED(+) PowerLED&Key lock 18 Ground 6 No Connection 19No Connection NC 7 Ground 20 HDDLED(-) HDD LED 8 Key lock 21 HDDLED(+) 9 Ground 22 NoConnection NC 10 Turbo LED(-)Turbo LED 23 NC NC 11 Turbo LED(+) 24Ground 12 Reset ControlReset 25 VCC VCCGround 13 Ground 26 Ground J12 FAN PowerConnectorPin 1,3,4,6: GND Pin2,5: +12V J1 PS/2 Mouse CableConnectorPin 1 MS_Data Pin 2 NC Pin 3 Ground Pin 4 VCC Pin 5 MS_Clock DRAM InstallationTotalMemory Size(MB) Bank0(SIMM1-SIMM2) Bank 1(SIMM3-SIMM4) 8M 4M x 2 pcs -- 16M 8M x 2 pcs -- 32M 16M x 2 pcs -- 64M 32M x 2 pcs -- 16M 4M x 2 pcs 4M x2 pcs 24M 4M x 2 pcs 8M x2 pcs 32M 8M x 2 pcs 8M x2 pcs 40M 4M x 2 pcs 16M x2 pcs 48M 8M x 2 pcs 16M x2 pcs 64M 16M x 2 pcs 16Mx 2 pcs 72M 4M x 2 pcs 32M x2 pcs 80M 8M x 2 pcs 32M x2 pcs 96M 16M x 2 pcs 32Mx 2 pcs 128M 32M x 2 pcs 32Mx 2 pcs Each Bank can beinstalled and worked individually, the mainboard provides optimal performanceand free choices depending on your needs. The list above for DRAM configurationis just for reference. EDO Type DRAM and FAST PAGE Type DRAM can be Mixed in perbank.
