PCS42. i MHz i MHz i MHz internal (25 MHz system) i MHz internal (33 MHz system) 25 MHz or 33 MHz

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1 PCS42 CHARACTERISTICS Microprocessor Clock Architecture i MHz i486 MHz i486 MHz i MHz internal (25 MHz system) i MHz internal ( MHz system) 25 MHz or MHz ISA / VESA CASE BOX TIN BOX TIN SLIM See the appropriate section in this Chapter. Memory Memory access time Video controller From 4 MB to 2 MB on the motherboard. The motherboard has three banks in which can SIMMs can be installed. Bank A Consisting of four 0-pin sockets Bank B Consisting of one 72-pin socket Bank C Consisting of one 72-pin socket The motherboard comes with four MB x 9 (4 MB) SIMMs installed in bank A. - Memory in bank A can be expanded using the following expansion kit: EXM-82/D 6 MB - Four 4MBx9 SIMMs (existing SIMMs have to be replaced) - Memory in banks B and C can be expanded using the following expansion kits: EXM MB - One MBx6 SIMM EXM MB - One 2MBx6 SIMM EXM MB - One 4MBx6 SIMM These systems can also accomodate SIMMs commercially available (with a 70 ns access time and FAST PAGE MODE). Note: In the 2 MB memory configuration ( ), the 2 MB SIMM must installed in bank C and not in bank B. 70 ns Video control functions can be provided by any one of the following boards: - GO 200 (580) - AT board with MB of video RAM. - VD VESA board with MB of video RAM expandable to 2 MB. - VGA-542VT - VESA board with MB of video RAM expandable to 2 MB. MOTHER MICROSTAR BIOS Last level: POWER SUPPLY TIN BOX Case ASTEC SA V / 20 V 200W SLIM TIN BOX Case ASTEC SA V / 20 V 00W DSP AG 5 V / 20 V 00W 8 Streaming Tape Irwin 250A 80/20 MB Floppy interface HDU and FDU controllers I/O controller board for TIN BOX cases - SUPER I/O board - PRIME IIC I/O controller board for SLIM TIN BOX cases - Super I/O board Continues PCS42 8-

2 Secondary level cache memory The motherboard is equipped with sockets into which secondary level cache memory chips can be installed. Bank consists of sockets U-U4. Bank 0 consists of sockets U6-U9. Socket U0 hosts the TAG RAM chip. The following cache capacities cn be obtained: 64KB 8 8Kbx8 SRAM chips (bank 0 and ) 28-pin TAG RAM chip 28 KB 4 2Kbx8 SRAM chips (bank 0) 28-pin TAG RAM chip 256 KB 8 2Kbx8 SRAM chips (bank 0 & ) 28-pin TAG RAM chip The access time is 20 ns. Note: The 28 KB cache memory configuration is used. The 64 KB and 256 KB configurations are not used. Floppy Disk Panasonic JU 257 A.44 MB Sony MP-F7 W / MPF MB Mitzumi D59T.44 MB Y-E DATA YD-702B / Y-E DATA YD-702D.44 MB TEAC FD25HF.44 MB Mitsubishi MF MB EPSON SMD MB Panasonic JU 475- / JU JU MB Canon MD MB Hard Disk 70 MB QUANTUM LPS 70 AT 20 MB W.D. AC20 20 MB CONNER CFS20A (local BUS) 20 MB SEAGATE ST250A 20 MB QUANTUM LPS20 AT (local BUS) 270 MB QUANTUM LPS270 AT (local BUS) 270 MB CONNER CFA270 A (local BUS) 40 MB QUANTUM LPS 40 AT 40 MB W.D. AC MB SEAGATE ST9A 420 MB SEAGATE ST49A 420 MB W.D. AC MB CONNER CFS420A (local BUS) 540 MB QUANTUM LPS540 AT (local BUS) 540 MB CONNER CFA540 A (local BUS) Slots TIN BOX Slots on the motherboard: - Four AT full-size - Three shared AT/VESA SLIM TIN BOX Slots on the bus board - Two AT full-size, one shared AT/VESA Mouse 400 dpi -button serial mouse which connects to the serial port of the I/O board. Keyboard 0/02-key ANK 27-0/N, ANK 27-02/N 0/02-key ANK 28-0, ANK Super compact keyboard. An adapter cable is required to connect the keyboard to the basic module. BUS EXPANSION Only used in models with a SLIM TIN BOX case. CONFIGURATION UTILITIES The configuration utilities for this system are stored in the BIOS. 8-2 PCS42

3 SYSTEM CASES The following figure shows this personal computer s two system cases, in addition to the boards and peripherals installed in each type of case. TIN BOX SLIM TIN BOX I/O CONTROLLER VIDEO CONTROLLER VIDEO CONTROLLER I/O CONTROLLER GLD6A GHB5A MOTHER MOTHER BUS EXPANSION 8 POWER SUPPLY POWER SUPPLY GHA8A GLC5A BAYS FOR.5"X"HIGH PERIPHERALS FLOPPY DISK BAYS FOR.5" OR 5.25" PERIPHERALS HARD DISK BAYS FOR.5" OR 5.25" PERIPHERALS HARD DISK FLOPPY DISK MOTHER LEVEL D.R.S. CODE ROM BIOS NOTES MICROSTAR Nasc. System motherboard. PCS42 8-

4 MOTHER INTEGRATED CONTROLLERS MOTHER- INTEGRATED CONTROLLERS CPU 25 MHz or MHz i486sx processor in QFP package (soldered) Processor Socket The following PGA processors can be installed in this socket: - i or MHz - i or MHz - i or 66 MHz M429 Chip set component which offers the following functions: - DRAM control - Cache control - ISA bus control - Keyboard control - Real Time Clock - CMOS RAM M4 Chip set component which offers address and data bus buffering KB EEPROM containing the system BIOS Keyboard controller U/ U0 Sockets for secondary level cache memory chips. 8-4 PCS42

5 VIDEO CONTROLLER S LEVEL NOTES GO200 Nasc. AT board with 52 KB of video RAM expandable to MB (580) VD Nasc. VESA board with MB of video RAM expandable to 2 MB VGA VT Nasc. VESA board with MB of video RAM expandable to 2 MB I/O CONTROLLER S LEVEL NOTES Super I/O board Nasc. I/O controller board for TIN BOX cases PRIME IIC Nasc. I/O controller board for TIN BOX cases Lev. 0 The BALE signal output by the hard disk is cut to correct the problem of noise disturbance on the 570 SX video controller (GO202). This noise is caused by the CONNER 20 A hard disk Super I/O board Nasc. I/O controller board for SLIM TIN BOX cases 8 ENHANCED VIDEO DRIVER DRIVER EVD for the GO200 (580) - Ver..02 video controller NOTES SYSTEM TEST LEVEL Rev..00 NOTES The video test does not work with the 580 SX video controller board. New version which includes new keyboard, video and floppy disk tests. BIOS LEVEL NOTES PCS42 8-5

6 POWER SUPPLY POWER SUPPLY LEVEL DESCRIPTION SA Nasc. 200 W power supply for TIN BOX cases. ASTEC SA00 40 Lev. 0 Lev. 02 Lev. 0 Lev. 04 Nasc Lev. 0 Lev. 02 To reduce EMI noise, the BEAD PN 5052B ferrite is installed on the center pin of mosfet Q, and diode D2 is removed. To : - comply with ENERGY STAR (EPA) requirements, and - ensure that power supply powers off correctly the modifications were made: - Components D8 - Q4 - R46 - C9 were added to the already preset printed circuit. - A K /6 W resistor was added to the primary of the primary of the power supply. A new supplier for the uf-6v C2 capacitor is used. Besides NCC, also RUBICON will now supply this component. - The layout of the Power Good board is optimized so that capacitors C25 and C26, previously volatile, can now be installed on the printed circuit. - Renewed motherboard printed circuit so that the R62 and Z5 components can be added. - New alternative suppliers for the following components: C - C2 (ISKRA and RIFA) - C2 (EVOX and ARCOTRONICS) - T (EDT9). Some power supply components were removed to cut production costs. 00 W power supply for SLIM TIN BOX cases. Modification made to the fan regulation circuit. From a High Speed model, the fan now becomes a Medium Speed model. This modification was implemented to correct the problems given by the systems supplied to MERCEDES. To correct: - Excessive ripple on the +2 V - Low power supply yield - Power Good problems the following modifications were made: - The SGS THOMSON alternative for the IC regulator was eliminated - Zener Z02 was changed from HZC2 to HZC - Capacitor C64 was changed from 470 pf to 2,200 pf This level does not include the modifications made in level 0 (specific for MERCEDES). Lev. 0 Modified fan circuitry to include the level 0 modifications on all the power supplies. DSP AG Nasc 00 W power supply SLIM TIN BOX cases. 8-6 PCS42

7 COMPONENTS AND JUMPERS ON THE MOTHER BUS EXPANSION SLOTS ON SLIM TIN BOX SYSTEMS ISA SLOT VESA/ISA SLOT POWER SUPPLY CONNECTOR KEY CONNECTOR JP BIOS EEPROM 2 4 MEMORY SOCKETS BANK A BANK B 8 JP8 JP JP4 JP5 JP6 BANK C J5 JP22 PGA PACKAGE CPU SOCKET M4 JP2 JP24 JP9 JP JP2 4 2 JP JP2 CONNECTOR J5 PIN - 5 POWER LED AND KEY PIN 7-0 SPEAKER PIN 2 - TURBO LED PIN 5-7 TURBO BUTTON PIN 9-20 HARDWARE RESET JP0 M429 JP7 JP9 JP2 JP7 JP8 JP JP8 U0 U4 U9 U U8 U2 U7 QFP PACKAGE CPU Position Position 2 Position Position 4 U U6 SOCKETS FOR SECONDARY LEVEL CACHE CHIPS EWU2A PCS42 8-7

8 JUMPERS JUMPER FUNCTION SETTING JP24 CPU selection OUT = Soldered CPU (PQFP) IN = On-socket CPU (PGA) CPU SELECTION JUMPERS i486 SX i487 SX i486 DX / i486 DX2 JP8 On -2 On 2- On 2- JP22 OUT On -2 On -2 CPU CLOCK 25 MHz MHz 40 MHz 50 MHz SELECTION JUMPERS JP6 On - 2 On - 2 On 2 - On 2 - JP7 Jumpers installed Jumpers installed Jumpers installed Jumper installed in position and 4 in position and 4 in position and 2 in position 2 JP8 IN IN IN OUT JP9 On - 2 On - 2 On 2 - On 2 - JP0 On - 2 On - 2 On 2 - On 2 - CACHE SELECTION 28 KB 256 KB JUMPERS JP On 2 - On - 2 JP2 On 2 - On - 2 VESA BUS CONFIGURATION JUMPERS JP2 FUNCTION High-speed write setting (VESA bus) CPU speed setting (VESa bus) SETTING OUT = Zero Wait State On - 4 = Wait State (default) OUT = Less than or equal to MHz (default) On - 2 = Greater than MHz JP2 Monitor type setting On 2 - = Color monitor On - 2 = Monochrome monitor CPU TYPE SELECTION JUMPERS JP2 - JP9 JP - JP Configuration of the type of CPU installed in the system - These jumpers JP - JP4 are factory set. JP5 8-8 PCS42

9 I/O ADDRESS MAP ADDRESS 0-0F h 20-2 h 40-4 h 60 h, 64 h 6 h 70 h 7 h 80-8F h 90 h 9 h 92 h 94 h 02 h A0 - A h EC - ED h EE h EF h F0 h F h F4 h F5 h F9 h FB h 0C0-0DF h F0-F7 h 20 h F h 2B0-2BF h 2C0-2CF h 2D0-2DF h 2E8-2EF h 2F8-2FF h 78-7F h B0 - BB h B4 / D4 h B5 / D5 h BA / DA h C0 - CF h D0 - DF h F0 - F7 h E8 - EF h F8 - FF h FUNCTION DMA controller # Interrupt controller # Timer counter Keyboard controller Port B Real Time Clock index register/nmi enable Real Time Clock data register DMA page registers Custom I/O port # Custom I/O port #2 PS/2-compatible FAST GATE A20 and FAST RESET Video controller system Setup register Video controller system Setup register Interrupt controller #2 Chipset configuration ports FAST A20 (alternative) FAST CPU reset port (alternative) Coprocessor busy register Coprocessor reset register CPU slow register CPU fast register Chipset configuration register disable Chipset configuration register enable DMA controller #2 IDE hard disk registers Game port Alternative LPT2 parallel port EGA video EGA video EGA video Alternative COM4 location for serial port B Primary COM2 location for serial port B Primary LPT parallel port MDA video VGA video VGA video VGA video EGA/VGA video CGA video Floppy disk drive location Alternative COM location for serial port A Primary COM location for serial port A 8 PCS42 8-9

10 DMA CHANNELS CHANNEL NUMBER OF BITS FUNCTION or 6 8 or 6 8 or 6 8 or INTERRUPT LEVELS Floppy disk transfers Used for the cascade connection of DMA INTERRUPT IRQ IRQ2 IRQ IRQ4 IRQ5 IRQ6 IRQ7 IRQ8 IRQ9 IRQ0 IRQ IRQ2 IRQ IRQ4 IRQ5 FUNCTION Counter timer Cascade input of the second interrupt controller COM2 interrupt COM interrupt LPT Floppy drive LPT2 Real Time Clock Not used Not used Not used Mouse Math coprocessor IDE drive controller Not used SYSTEM MEMORY MAP ADDRESS RANGE 00000h - 7FFFFh 80000h - 9FFFFh A0000h -BFFFFh C0000h - CFFFFh D0000h - DFFFFh E0000h - EFFFFh F0000h - FFFFFh 00000h - FFFFFh h - FFFFFh FFFF0000h - FFFFFFFFh FUNCTION 52 KB system memory 28 KB system memory / optional ISA mapping Text and graphics memory (on the motherboard) Video BIOS Extended ROM BIOS / expansion for the I/O channels Video BIOS System BIOS 4 MB of system DRAM Expansion SIMMs System BIOS shadow The entire DRAM area can be cached or not. 8-0 PCS42