MICRONICS COMPUTERS, INC. JX30Gc VL-BUS Processor 80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor 25/33/50(internal)/66(internal)/100(internal)MHz Speed Chip Set Micronics Max. Onboard 64MB DRAM Cache 64/128/256KB BIOS Phoenix Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface (2), parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J8 Power LED & keylock J31 Serial port 2 J9 IDE interface - J32 secondary External keyboard J13 32-bit VESA Local bus S1 & S2 slots Serial port 1 J14 Turbo LED W18 Parallel port J16 Turbo switch W19 IDE interface - J26 Reset switch W20 primary Floppy drive interface J27 IDE interface LED W21 Speaker J30 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Factory configured - do not SW1/3 Off alter » Factory configured - do not SW1/4 Off alter » Real time clock installed W1 Closed Real time clock not W1 Open installed » Monitor type select color W2 Closed Monitor type select W2 Open monochrome » Factory configured - do not W3 Open alter » Parity enabled W4 Closed Parity disabled W4 Open » CMOS memory normal operation W5 Open CMOS memory clear W5 Closed » Normal operation W8 pins 2 & 3 closed BIOS recovery enabled W8 pins 1 & 2 closed » Primary IDE (J26) enabled W34 pins 1 & 2 closed Primary IDE (J26) disabled W34 pins 2 & 3 closed » Parallel port select IRQ7 W36 pins 1 & 2 closed Parallel port select IRQ5 W36 pins 2 & 3 closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG TAG/U61 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 32K x 8 (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 (1) 32K x 8 Note:If Write-Through caching is not being used, the chip at U61 is not installed. CACHE JUMPER CONFIGURATION Size W10 W11 W22 W23 W24 64KB 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2 128KB 1 & 2 2 & 3 1 & 2 1 & 2 2 & 3 256KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note:Pins designated should be in the closed position. CACHING METHOD CONFIGURATION Method Size W16 W17 Write-Through All Open Open Write-Back 64KB pins 1 & 2 closed pins 1 & 2 closed Write-Back 128KB pins 1 & 2 closed pins 2 & 3 closed Write-Back 256KB pins 2 & 3 closed pins 2 & 3 closed 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 4MB (1) 1M x 36 NONE NONE NONE 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 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 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 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 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CPU TYPE CONFIGURATION Type W12 W13 80486SX pins 1 & 2 closed pins 2 & 3 closed 80486DX pins 2 & 3 closed pins 2 & 3 closed 804896DX2 pins 2 & 3 closed pins 2 & 3 closed Pentium Overdrive pins 2 & 3 closed pins 1 & 2 closed CPU SPEED CONFIGURATION Speed SW1/1 SW1/2 25MHz Off On 33MHz On On 50iMHz Off On 66iMHz On On 75iMHz Off On 100iMHz On On PARALLEL PORT CHANNEL CONFIGURATION Channel W37 W38 » NONE Open Open DMA1 pins 1 & 2 closed pins 1 & 2 closed DMA3 pins 2 & 3 closed pins 2 & 3 closed SECONDARY IDE CHANNEL CONFIGURATION Channel W39 W40 » NONE Open Open DMA6 pins 1 & 2 closed pins 1 & 2 closed DMA7 pins 2 & 3 closed pins 2 & 3 closed