Packard Bell Pegasus M/Board Pegasus Motherboard Diagram Specification Audio : On board ESS ES1869. BIOS : AWARD BIOS. Cache : 512 kB Pipeline Burstcache integrated on motherboard. Not upgradable. Chipset : Sis 5598 ISA/PCI chip. CPU Support : Socket 7 processors: Intel Pentium 90-233 MMX, Cyrix M2, AMD K6-2. Expansion Slots: 1 ISA slot, 2 PCI slots, 1 shared ISA/PCI slot. Form Factor : MicroATX RAM : 2 DIMM sockets supporting single or double-sided SDRAM up to a maximum of 256 MB. Video : Integrated in chipset, uses main RAM as video memory. Upgrade Options RAM : Maximum on Motherboard: 256 MB Uses 8/16/32/64/128 MB DIMMs, 60ns or faster EDO SDRAM DIMMs Supports only non-parity DIMM modules. The 168-pin DIMM sockets will accept 3.5 V 1 MBx64 (8 MB), 2 MBx64 (16 MB), 4 MBx64 (32 MB), 8 MBx64 (64 MB), and 16 MBx64 (128 MB) DIMMs. Bank 0 will be populated as the default from the factory. No configuration jumpers: BIOS detects memory size, and memory type. This motherboard will not accept 36-bit DIMM modules (parity). Video Memory: The video controller is integrated on the motherboard and the amount of video memory (4 MB) is not upgradeable. Cache Memory: This system has 512 KB cache memory integrated on the motherboard and it is not upgradeable. Processors : Motherboard can accommodate the following CPUs: Intel P54C/P55C: 75 - 233 MHz, AMD K6: 266 MHz, AMD K6-2: 300 - 333 MHz, Cyrix MII: 266 - 333 When upgrading the CPU, use the CPU Clock Selection jumpers (JP14, JP15, and JP16) to set the host bus frequency and the CPU/Bus Speed Selection jumpers (JP1, JP2, and JP3) to set the clock multiplier. Configuring the motherboard for Intel CPUs JP1 Rest --------------------------------------------------------------------------------------------------- CPU V0 V1 V2 V3 JP6 SW1 SW2 SW3 SW4 SW5 SW6 --------------------------------------------------------------------------------------------------- Pentium 90 OFF OFF OFF ON OFF ON OFF OFF OFF OFF OFF Pentium 100 OFF OFF OFF ON OFF OFF OFF OFF OFF OFF OFF Pentium 120 OFF OFF OFF ON OFF ON OFF OFF ON OFF OFF Pentium 133 OFF OFF OFF ON OFF OFF OFF OFF ON OFF OFF Pentium 150 OFF OFF OFF ON OFF ON OFF OFF ON ON OFF Pentium 166 OFF OFF OFF ON OFF OFF OFF OFF ON ON OFF Pentium 200 OFF OFF OFF ON OFF OFF OFF OFF OFF ON OFF Pentium 166 MMX OFF OFF OFF ON OFF OFF OFF OFF ON ON OFF Pentium 200 MMX OFF OFF OFF ON OFF OFF OFF OFF OFF ON OFF Pentium 233 MMX OFF OFF OFF ON OFF OFF OFF OFF OFF OFF OFF Configuring the motherboard for other CPUs JP1 Rest --------------------------------------------------------------------------------------------------- CPU V0 V1 V2 V3 JP6 SW1 SW2 SW3 SW4 SW5 SW6 --------------------------------------------------------------------------------------------------- Cyrix M2 300 ON OFF OFF ON OFF OFF ON ON OFF ON OFF AMD K6-2 333 OFF ON OFF OFF OFF OFF OFF OFF OFF ON ON AMD K6-2 366 OFF ON OFF OFF OFF OFF OFF OFF OFF OFF ON Jumpers Jumper Function Configuration JP2 CMOS Clear 1-2 - Normal Operation 2-3 - Clear CMOS Data Open - Disable Battery Onboard VGA (JP16, JP25) Jumper Pins Function JP16 1-2 Disable onboard video 2-3 Enable onboard video JP25 1-2 Enable onboard video 2-3 Disable onboard video CPU/DRAM Clock Selection CPU/DRAM Clock (MHz) SW1 SW2 SW3 55 ON ON OFF 60 ON OFF OFF 66 OFF OFF OFF 75 OFF ON ON CPU/Bus Speed Ratio Select Intel CPU/Bus SW4 SW5 SW6 X1.5/X3.5 OFF OFF OFF X2.0 ON OFF OFF X2.5 ON ON OFF X3.0 OFF ON OFF X4.0 ON OFF ON X4.5 ON ON ON X5.0 OFF ON ON X5.5 OFF OFF ON Core Voltage - JP1 Voltage VO V1 V1 V3 2.1v ON OFF OFF OFF 2.2v OFF ON OFF OFF 2.3v ON ON OFF OFF 2.8v OFF OFF OFF ON 2.9v ON OFF OFF ON 3.2v OFF OFF ON ON 3.3v ON OFF ON ON 3.5v ON ON ON ON I/O voltage - JP6 Voltage JP6 3.3v OFF 3.45v ON