IBM CORPORATION PC SERVER 300 (TYPE 8640) ONO, 1NO, 1NJ, ONJ Processor 80486SX/80486DX/80486DX2/80486DX4/P24T Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Video Chip None Set Maximum 128MB Onboard Memory Maximum None Video Memory Cache 128/256KB BIOS Unidentified Dimensions 355mm x 304mm I/O Options 32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port J2 IDE interface 1 J21 Speaker J5 IDE interface 2 J22 Parallel port J8 Power LED W12 Floppy drive interface J9 PCI IDE interface LED W39 Serial port 2 J10 ISA IDE interface LED W46 Serial port 1 J11 32-bit PCI slots PC1 – PC3 USER CONFIGURABLE SETTINGS Function Label Position » Secondary cache write select W1 Pins 2 & 3 write back closed Secondary cache write select W1 Pins 1 & 2 write through closed » Internal cache write select write W4 Open through Internal cache write select write W4 Closed back » BIOS normal operation W6 Pins 2 & 3 closed BIOS recovery mode W6 Pins 1 & 2 closed » Factory configured - do not alter W8 Closed » PS/2 mouse enabled W10 Closed PS/2 mouse disabled W10 Open DPU generates parity W17 Pins 1 & 2 closed CPU generates parity W17 Pins 2 & 3 closed » DPU parity error disabled W18 Pins 2 & 3 closed DPU parity error enabled W18 Pins 1 & 2 closed » Cache enabled W21 Open Cache disabled W21 Closed » PCI IDE IRQ14 enabled W35 Closed PCI IDE IRQ14 disabled W35 Open » PCI IDE PCI INT A disabled W37 Closed PCI IDE PCI INT A enabled W37 Open » PCI IRQ15 disabled W38 Open PCI IRQ15 enabled W38 Closed ISA IDE IRQ select IRQ14 W42 Pins 1 & 2 closed ISA IDE IRQ select IRQ15 W42 Pins 2 & 3 closed SIMM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 None None None 8MB (1) 2M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 12MB (1) 2M x 36 (1) 1M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 12MB (1) 1M x 36 (1) 2M x 36 None None 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 24MB (1) 4M x 36 (1) 2M x 36 None None 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 8M x 36 None None None 32MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36MB (1) 8M x 36 (1) 1M x 36 None None 40MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 None 40MB (1) 8M x 36 (1) 2M x 36 None None 40MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 44MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 None 48MB (1) 8M x 36 (1) 4M x 36 None None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 56MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 64MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 None 64MB (1) 8M x 36 (1) 8M x 36 None None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 80MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 None 112MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Note: The location of the cache is unidentified. CACHE JUMPER CONFIGURATION Size W5 W22 W23 128KB Open Closed Open 256KB Closed Open Closed TAG CONFIGURATION Type W24 W26 7-bit Open Closed 8-bit Closed Closed » 9-bit Closed Open Reserved Open Open CPU SPEED SELECTION Speed W16 W20 25MHz Open Closed 33MHz Closed Open 50iMHz Open Closed 66iMHz Closed Open 75iMHz Open Closed 100iMHz Closed Open CPU TYPE SELECTION Type W2 W3 80486SX Pins 2 & 3 closed Closed 80486DX Pins 1 & 2, 3 & 4 Closed closed 80486DX2 Pins 1 & 2, 3 & 4 Closed closed 80486DX4 Pins 1 & 2, 3 & 4 Closed closed P24T Pins 1 & 2, 3 & 4 Open closed CPU MULTIPLIER SELECTION Multiplier W33 80486DX4 Pins 1 & 2 closed 80486DX4 (2x) Pins 2 & 3 closed 80486SX/DX/DX2/DX4 (3x) Open IDE DMA CHANNEL SELECTION Channel W43 » PIO transfer Open 6 Pins 1 & 2 closed 7 Pins 2 & 3 closed PCI IRQ JUMPER SELECTION Note: The jumper settings for J101 are unidentified.