MICRONICS COMPUTERS, INC. MPOWER4 PLUS (VER.A) Processor 80486SX/ODP486SX/80486DX/80486DX2/Pentium Overdrive Processor 25/33/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Micronics Max. 64MB Onboard DRAM Cache 64/128/256KB BIOS Phoenix Dimensions 330mm x 218mm I/O 32-bit VESA local bus, floppy drive interface, IDE interface, Options parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Parallel port J1 Video feature J31 connector Serial port 2 J2 VGA port J32 Serial port 1 J3 Turbo LED W18 Power LED & keylock J7 Turbo switch W19 PS/2 mouse port J10 Reset switch W20 IDE interface J26 IDE interface LED W21 Floppy drive J27 32-bit VESA Local bus SL1 interface slots Speaker J30 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Cache select write back U61 Installed Cache select write through U61 Not installed » 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 » IRQ12 PS/2 mouse enabled W3 Closed PS/2 mouse disabled W3 Open » Parity enabled W4 Closed Parity disabled W4 Open » CMOS memory normal W5 Open operation CMOS memory clear W5 Closed » Super I/O enabled W7 Open Super I/O disabled W7 Closed » Flash BIOS write protect W8 Open enabled Flash BIOS write protect W8 Closed disabled » PQFP not installed W13 Open PQFP disabled by Overdrive W13 pins 1 & 2 processor closed PQFP manually disabled W13 pins 2 & 3 closed » Factory configured - do not W15 pins 1 & 2 alter closed » Factory configured - do not W31 Open alter » Factory configured - do not W36 Open alter » VGA IRQ9 disabled W303 Open VGA IRQ9 enabled W303 Closed » Factory configured - do not SW1/3 Off alter » Factory configured - do not SW1/4 Off alter VPU chip disabled SW2/1 On VPU chip enabled SW2/1 Off Video RAMDAC at snooping SW2/2 On mode Video RAMDAC at normal mode SW2/2 Off VGA BIOS disabled SW2/3 On VGA BIOS enabled SW2/3 Off External speaker disabled SW2/4 On External speaker enabled SW2/4 Off 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 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 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size W10 W11 W16 W17 W22 W23 W24 64KB 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2 128KB 1 & 2 2 & 3 1 & 2 2 & 3 1 & 2 1 & 2 2 & 3 256KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note:Pins designated should be in the closed position. CPU CONFIGURATION Type W33 All other CPU’s pins 1 & 2, 3 & 4 closed 80486SX pins 2 & 3 closed 80486SX2 pins 3 & 4 closed 80486DX4 CONFIGURATION 80486DX4 W32 W34 Disabled Open Open Enabled pins 1 & 2 closed pins 3 & 4 closed CPU SPEED CONFIGURATION Speed Switch 1/1 Switch 1/2 25MHz Off On 33MHz On On 50iMHz Off On 66iMHz On On 75iMHz Off On 100iMHz On On DMA CHANNEL CONFIGURATION DMA Channel W98 W99 Channel 1 pins 1 & 2 closed pins 1 & 2 closed Channel 2 pins 2 & 3 closed pins 2 & 3 closed VRAM CONFIGURATION Size Bank 0 Bank 1 1MB (2) 512K x 8 NONE 2MB (2) 512K x 8 (2) 256K x 8 Note: Bank 0 is factory installed and is not configurable.