MICRONICS COMPUTERS, INC. TWISTER AT (REV. 1B) Device Type Mainboard Processor CX 6x86/AM K5/AM K6/Pentium Processor Speed 75/90/100/120/133/150/166/180/200/233MHz Chip Set Intel 430TX Video Chip Set None Maximum Onboard 256MB (EDO & SDRAM supported) Memory Maximum Video None Memory Cache 256/512KB BIOS Award Dimensions 330mm x 218mm I/O Options 32-bit PCI slots (5), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location USB connector 1 J10 Green PC connector J23/pins 3 & 4 USB connector 2 J11 IR connector J23/pins 6 - 10 IDE interface 2 J13 IDE interface LED J23/pins 13 - 16 Serial port 2 J14 Power LED J23/pins 18 - 20 IDE interface 1 J15 Reset switch J23/pins 22 & 23 Floppy drive J16 Speaker J23/pins 24 - interface 27 Parallel port J17 Power LED & J24 keylock Chassis fan power J18 SCSI interface LED J101 PS/2 mouse J19 32-bit PCI slots PC1 - PC5 interface Serial port 1 J22 USER CONFIGURABLE SETTINGS Function Label Position ? CMOS memory normal operation JP1 Pins 1 & 2 closed CMOS memory clear JP1 Pins 2 & 3 closed Flash BIOS normal operation JP2 Pins 2 & 3 closed Flash BIOS reserved JP2 Pins 1 & 2 closed SIMM CONFIGURATION Size Bank 0 Bank 1 8MB (2) 1M x 36 None 16MB (2) 2M x 36 None 16MB (2) 1M x 36 (2) 1M x 36 24MB (2) 2M x 36 (2) 1M x 36 32MB (2) 4M x 36 None 32MB (2) 2M x 36 (2) 2M x 36 40MB (2) 4M x 36 (2) 1M x 36 48MB (2) 4M x 36 (2) 2M x 36 64MB (2) 8M x 36 None 64MB (2) 4M x 36 (2) 4M x 36 72MB (2) 8M x 36 (2) 1M x 36 80MB (2) 8M x 36 (2) 2M x 36 96MB (2) 8M x 36 (2) 4M x 36 128MB (2) 8M x 36 (2) 8M x 36 128MB (2) 16M x 36 None 136MB (2) 16M x 36 (2) 1M x 36 144MB (2) 16M x 36 (2) 2M x 36 160MB (2) 16M x 36 (2) 4M x 36 192MB (2) 16M x 36 (2) 8M x 36 256MB (2) 16M x 36 (2) 16M x 36 Note: Board accepts EDO & SDRAM memory.. DIMM CONFIGURATION Size Bank 2 Bank 3 8MB (1) 1M x 64 None 16MB (1) 2M x 64 None 16MB (1) 1M x 64 (1) 1M x 64 24MB (1) 2M x 64 (1) 1M x 64 32MB (1) 4M x 64 None 32MB (1) 2M x 64 (1) 2M x 64 40MB (1) 1M x 64 (1) 4M x 64 48MB (1) 2M x 64 (1) 4M x 64 64MB (1) 8M x 64 None 64MB (1) 4M x 64 (1) 4M x 64 72MB (1) 1M x 64 (1) 8M x 64 80MB (1) 2M x 64 (1) 8M x 64 96MB (1) 4M x 64 (1) 8M x 64 128MB (1) 8M x 64 (1) 8M x 64 256MB (1) 16M x 64 (1) 16M x 64 Note: Board accepts EDO & SDRAM memory. Banks 2 & 3 are interchangeable. CACHE CONFIGURATION Size Bank 0 256KB (2) 32K x 32 512KB (2) 64K x 32 Note: The location of the cache is unidentified. CPU SPEED SELECTION (CYRIX) CPU Clock Multiplier JP4 JP5 JP6 JP7 JP8 JP60 speed speed 150MHz 50MHz 2x 1 & 2 & 2 & 2 & 1 & Open 2 3 3 3 2 166MHz 60MHz 2x 1 & 2 & 2 & 1 & 2 & Open 2 3 3 2 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AMD K5) CPU Clock Multiplier JP4 JP5 JP6 JP7 JP8 JP60 speed speed 75MHz 50MHz 1.5x 1 & 1 & 2 & 2 & 2 & Open 2 2 3 3 3 90MHz 60MHz 1.5x 1 & 1 & 2 & 2 & 1 & Open 2 2 3 3 2 100MHz 66MHz 1.5x 1 & 1 & 2 & 1 & 2 & Open 2 2 3 2 3 120MHz 60MHz 1.5x 1 & 1 & 2 & 2 & 1 & Open 2 2 3 3 2 133MHz 66MHz 2x 1 & 2 & 2 & 1 & 2 & Open 2 3 3 2 3 166MHz 66MHz 2.5x 2 & 2 & 2 & 1 & 2 & Open 3 3 3 2 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AMD K6) CPU Clock Multiplier JP4 JP5 JP6 JP7 JP8 JP60 speed speed 166MHz 66MHz 2.5x 2 & 2 & 2 & 1 & 2 & Open 3 3 3 2 3 200MHz 66MHz 3x 2 & 1 & 2 & 1 & 2 & Open 3 2 3 2 3 233MHz 66MHz 3.5x 1 & 1 & 2 & 1 & 2 & 1 & 2 2 2 3 2 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP4 JP5 JP6 JP7 JP8 JP60 speed speed 75MHz 50MHz 1.5x 1 & 1 & 2 & 2 & 2 & Open 2 2 3 3 3 90MHz 60MHz 1.5x 1 & 1 & 2 & 2 & 1 & Open 2 2 3 3 2 100MHz 66MHz 1.5x 1 & 1 & 2 & 1 & 2 & Open 2 2 3 2 3 120MHz 60MHz 2x 1 & 2 & 2 & 2 & 1 & Open 2 3 3 3 2 133MHz 66MHz 2x 1 & 2 & 2 & 1 & 2 & Open 2 3 3 2 3 150MHz 60MHz 2.5x 2 & 2 & 2 & 2 & 1 & Open 3 3 3 3 2 166MHz 66MHz 2.5x 2 & 2 & 2 & 1 & 2 & Open 3 3 3 2 3 180MHz 60MHz 3x 2 & 1 & 2 & 2 & 1 & Open 3 2 3 3 2 200MHz 66MHz 3x 2 & 1 & 2 & 1 & 2 & Open 3 2 3 2 3 233MHz 66MHz 3.5x 1 & 1 & 2 & 1 & 2 & Open 2 2 3 2 3 Note: Pins designated should be in the closed position. CPU TYPE SELECTION Type JP11 JP12 JP13 JP14 JP16 JP17 JP18 JP19 CX6X86 Open Closed Open Open Open Closed Open Open CX6X86L Open Open Open Closed Open Closed Open Open AM K5 Open Open Closed Open Open Closed Open Open AM K6 Open Open Open Closed Open Closed Open Open AM K6 Closed Open Open Open Open Closed Open Open 233MHz P54C Open Closed Open Open Open Closed Open Open P54CS Open Closed Open Open Open Closed Open Open P54CTB Open Closed Open Open Open Closed Open Open P55C Open Open Open Closed Open Closed Open Open