US Logic Omni III Settings Faxback Doc. # 17551 Jumper Definition Jumpers are used to select options for certain features. To set a jumper to "close" means covering the jumper pins with the jumper caps, and "open" means not to cover the pins. Jumpers with more than two pins have numbers on the motherboard identifying the pins. ┌─────────────────────────┐ │Main Logic Board Layout: │ └─────────────────────────┘ ┌────────────────────────────────────────────────────────────────────┐ │ ┌─┐ ┌────────┐ │ │ ┌──┐ │ │ ┌J1┐ └───J3───┘ │ │ KB1│ │P│ │ │ ┌──────────┐ │ │ │ │ │S│ └──┘ ┌──────────┐ └────J5────┘ │ │ └──┘ │1│ └───J4─────┘ ┌───────────┐ │ │ │ │ ┌J2┐ └────J6─────┘ │ │ ┌┬┐ │ │ │ │ │ │ ├┴┤ │ │ │ │ │ │ │ JP2 └─┘ └──┘ JP23───┐ ┌────JP25 │ │ JP1 JP22──┐│ │┌───JP27 │ │ JP21─┐││ ││┌──JP29 │ │ │││ ├┼┼┐ │ │ ┌──────────────┐ ┌┼┼┤ ├┼┼┤ │ │ └───PCI3───────┘ JP12 └┴┴┘ └┴┴┘ │ B │ ┌──┐ ┌────────────────┐ ┌┐ JP13 │ a │ ┌──────────────┐ └──┘ │ │ ├┤ JP14 │ c │ └───PCI2───────┘ │ │ ├┤ JP16 │ k │ │ │ └┘ ┌┬┐ │ │ ┌──────────────┐ │ │ JP33├┼┤JP34│ │ └───PCI1───────┘ │ │ JP36├┼┤JP35│ o │ │ │ │││ │ f │ ┌─┐ │ │ JP38├┴┤JP37│ │ │ │JP11 │ │ │ │ │ c │ └─┘ │ │ ├┬┤JP39│ o │┌────────────┬────────┐ │ │ JP41├┼┤JP40│ m │└SL1─────────┴─SL5────┘ └────────────────┘ JP42├┼┤JP43│ p │ ┌┬─┐ JP18 ┌┬┬┐ JP45├┼┤JP44│ u │┌────────────┌────────┐ ├┼─┘ ┌──┐ └┼┼┤ JP47└┴┘JP46│ t │└SL2─────────┴─SL6────┘ │ JP17 └──┘ JP30 ││ │ e │ └─JP15 JP31─┘│ │ r │┌────────────┬────────┐ ┌────────┐ JP32──┘ CN2 │ │└SL3─────────┴─SL7────┘ └─VE1────┘ JP28 ┌┐ ┌┐ │ │ JP26 ┌┐ ┌┐ ┌┐ ││ ││ │ │┌────────────┬────────┐ ┌────────┐ └┘ └┘ └┤ └┘ └┘ │ │└SL4─────────┴─SL8────┘ └─VE2────┘ JP7─────────┘ CN1 │ └────────────────────────────────────────────────────────────────────┘ Connector Definition Connector Function KB1 AT Keyboard PS1 Power Supply SL1~SL8 ISA Slots VE1, VE2 VL Bus Slots PCI1~PCI3 PCI Bus Slots CN1 Speaker CN2 Power LED/Keylock LE1 Turbo LED J1, J2 SIO1, SIO2 J3 PIO J4 FDD Controller J5 Secondary IDE J6 Primary IDE J7 HDD LED JP12 External Suspend SW (enter the power-saving SUSPEND mode JP26 RESET JP28 Turbo SW ┌─────────────────────────────────┐ │Installing an Upgrade Processor: │ └─────────────────────────────────┘ Note: When you use an SL-DX4 CPU, you have to set JP30, JP31 and JP32 to 2-3 to use voltage of 3.3 VDC. The maximum ambient temperature of the P24T system is 40°C. CAUTION: Double check the jumper settings before installing the new chip. Incorrect installation of upgrade processor can cause electrical damage to the main logic board or the component. If you choose not to perform this procedure, your computer dealer can do this for you. CPU Type: ┌──────────────┬────────────┬────────────┬───────────────────┐ │486SX │486DX/DX2 │SL-DX │SL-SX2/DX/DX2/DX4* │ │Processor │Processor │Processor │Processor │ ├──────────────┼────────────┼────────────┼───────────────────┤ │JP18 1-3, 2-4 │JP18 1-3,2-4│JP18 1-3 2-4│JP18 1-3, 2-4 │ │JP33 Open │JP33 Open │JP33 Open │JP33 Open │ │JP34 Open │JP34 Open │JP34 Open │JP34 Open │ │JP35 Open │JP35 Open │JP35 Open │JP35 Open │ │JP36 Open │JP36 Open │JP36 Open │JP36 Open │ │JP37 Open │JP37 Open │JP37 2-3,4-5│JP37 2-3, 4-5 │ │JP38 Open │JP38 3-4 │JP38 Open │JP38 3-4 │ │JP39 1-2 │JP39 1-2 │JP39 3-4 │JP39 3-4 │ │JP40 Open │JP40 Open │JP40 Open │JP40 Open │ │JP41 Open │JP41 Open │JP41 1-2 │JP41 1-2 │ │JP43 Open │JP43 Open │JP43 1-2 │JP43 1-2 │ │JP44 Open │JP44 Open │JP44 Open │JP44 Open │ │JP46 2-3 │JP46 1-2,3-4│JP46 2-3 │JP46 1-2, 3-4 │ │JP47 Open │JP47 Open │JP47 Open │JP47 Open │ └──────────────┴────────────┴────────────┴───────────────────┘ ┌──────────────┬────────────┬────────────┬─────────────┬──────────────┐ │P24D │P24T │Cyrix M7** │AMD 486DXLT │UMC 486SX │ │Processor │Processor │Processor │Processor │Processor │ ├──────────────┼────────────┼────────────┼─────────────┼──────────────┤ │JP18 1-3, 2-4 │JP18 1-3,2-4│JP18 1-3,4-6│JP18 2-4,3-54│JP18 2-4.3-5 │ │JP33 1-2 │JP33 Open │JP33 Open │JP33 Open │JP33 Open │ │JP34 1-2 │JP34 Open │JP34 Open │JP34 Open │JP34 Open │ │JP35 1-2 │JP35 Open │JP35 Open │JP35 Open │JP35 Open │ │JP36 2-3 │JP36 Open │JP36 Open │JP36 Open │JP36 Open │ │JP37 2-3,4-5 │JP37 2-3,4-5│JP37 1-2,3-4│JP37 Open │JP37 Open │ │JP38 3-4 │JP38 2-3 │JP38 3-4 │JP38 1-2,3-4 │JP38 1-2 │ │JP39 1-2 │JP39 1-2 │JP39 3-4 │JP39 1-2 │JP39 1-2 │ │JP40 Open │JP40 1-2 │JP40 2-3 │JP40 Open │JP40 Open │ │JP41 1-2 │JP41 1-2 │JP41 2-3 │JP41 Open │JP41 Open │ │JP43 1-2 │JP43 1-2 │JP43 1-2 │JP43 2-3 │JP43 2-3 │ │JP44 Open │JP44 2-3 │JP44 1-2 │JP44 Open │JP44 Open │ │JP46 2-3 │JP46 1-2,3-4│JP46 1-2,3-4│JP46 1-2, 3-4│JP46 2-3 │ │JP47 Open │JP47 1-2 │JP47 2-3 │JP47 3-4 │JP47 3-4 │ └──────────────┴────────────┴────────────┴─────────────┴──────────────┘ CPU Speed ┌─────────────┬───────┬───────┬───────┬──────┐ │ │25 MHz │33 MHz │40 MHz │50 MHz│ │JP15 VESA 0/1│ │ │ │ │ │ Wait State │Open │ Open │ Closed│Closed│ │JP17 VESA CLK│Open │ Open │ Closed│Closed│ │JP21 │Closed │ Closed│ Closed│Open │ │JP22 │Open │ Closed│ Closed│Open │ │JP23 │Open │ Closed│ Open │Closed│ └─────────────┴───────┴───────┴───────┴──────┘ * If you install an SL-DX4 CPU, set JP42 to 1-2: 2.5 CPU clock mode 2-3: 2 CPU clock mode Open: 3 CPU clock mode **If you install a Cyrix M7 CPU, set JP45 to 1-2: 1 CPU clock mode 2-3: 2 CPU clock mode Secondary Cache Memory ┌────────┬─────┬──────┬──────┬──────┬──────┬───────┐ │Jumper │128KB│ 256KB│ 256KB│ 512KB│ 512KB│ 1MB │ │ │ │ 32x8 │ 64x8│ 64x8 │ 128x4│ 128x8 │ ├────────┼─────┼──────┼──────┼──────┼──────┼───────┤ │JP13 │Open │Close │Close │Close │Close │Close │ │JP14 │Open │Open │Open │Close │Close │Close │ │JP16 │Open │Open │Open │Open │Open │Close │ │JP25 │Open │Open │Open │Open │1-2 │2-3 │ │JP27 │2-3 │1-2 │2-3 │1-2 │2-3 │1-2 │ │JP29 │Open │Open │1-2 │2-3 │1-2 │2-3 │ └────────┴─────┴──────┴──────┴──────┴──────┴───────┘ See Faxback Doc. # 17549 for installation instructions for Cache memory. Cache Configuration ┌─────────────────┬──────────┬──────────────────────┐ │Cache Size │Tag │ SRAM │ │ │U27 │ Bank 0 ││ Bank 1 │ │ │ │ U19-U22 ││ U29-32 │ ├─────────────────┼──────────┼─────────┼┼───────────┤ │128KB │32KB x 8 │32KB x 8 ││ │ │256KB │32KB x 8 │32KB x 8 ││ 32KB x 8 │ │256KB │64KB x 8 │64KB x 8 ││ ┤ │512KB │64KB x 8 │64KB x 8 ││64KB x 8 │ │512KB │128KB x 8 │128KB x 8││ │ │1 MB │128KB x 8 │128KB x 8││128KB x 8 │ └─────────────────┴──────────┴─────────┴┴───────────┘ NOTE: Use chips of the same speed (15ns) throughout the system to avoid memory problems. Others ┌────────────┬────────────────────────────────┐ │Jumper │ Pin Definition │ ├────────────┼────────────────────────────────┤ │ │ ECP Mode DMA Channel Select │ │ │ Channel 1 Channel 3 │ ├────────────┼───────────────┬────────────────┤ │ JP1 │ 1-2 │ *2-3 │ │ JP2 │ 1-2 │ *2-3 │ │────────────┼───────────────┴────────────────┤ │JP11 │ 1-2 +12 for VPP (flash EPROM)│ │ │ *2-3 +5 for VPP │ └────────────┴────────────────────────────────┘ (cc/tmc-12/04/95)