DIGITAL EQUIPMENT CORPORATION DIGITAL 21164 Processor Alpha Processor Speed 266/300/333MHz Chip Set DEC Video Chip Set None Maximum Onboard Memory 512MB Maximum Video Memory None Cache 2048/4096/8192KB BIOS Unidentified Dimensions 332mm x 307mm I/O Options 64-bit PCI slots (2), 32-bit PCI slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), cache slots (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Chassis fan J2/pins 3 & 5 Serial port 1 J27 power Chassis fan J2/pins 7 & 9 IDE interface J28 power Halt connector J2/pins 8 & 10 Floppy drive J31 interface Chassis fan J2/pins 11 & 13 Parallel port J33 power Reset switch J2/pins 12 & 14 PS/2 mouse port J34 IDE interface J2/pins 15 & 17 64-bit PCI slots PC1 & PC2 LED Keylock J2/pins 18 & 20 32-bit PCI slots PC3 & PC4 Speaker J2/pins Cache slot SL1 19,21,23,25 Serial port 2 J26 Cache slot SL2 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J1/pins 9 & N/A alter 10 » SROM test disabled J1/pins 23 & Open 24 SROM test enabled J1/pins 23 & Closed 24 » Loaded image select alternate J1/pins 25 & Closed images loaded 26 Loaded image select first image J1/pins 25 & Open loaded 26 » Cache speed select nominal read J1/pins 29 & Open speed 30 Cache speed select read speed 1 J1/pins 29 & Closed cycle faster 30 » Factory configured - do not J1/pins 31 & N/A alter 32 » Factory configured - do not J1/pins 33 & N/A alter 34 » Factory configured - do not J1/pins 35 & N/A alter 36 » Factory configured - do not J1/pins 37 & N/A alter 38 » Factory configured - do not J1/pins 39 & N/A alter 40 » SROM test connector J13 N/A » Flash BIOS write protect J14 Pins 2 & 3 disabled closed Flash BIOS write protect enabled J14 Pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 32MB (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 64MB (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 128MB (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 256MB (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 512MB (2) 16M x 36 (2) 16M x 36 (2) 16M x 36 (2) 16M x 36 CACHE CONFIGURATION Size SL1 SL2 2MB 2MB None 4MB 4MB None 8MB 4MB 4MB Note: The sizes of the cache modules are unidentified. CACHE JUMPER CONFIGURATION Size J1/pins 11 & 12 J1/pins 13 & 14 J1/pins 15 & 16 2MB Closed Open Open 4MB Open Closed Closed 8MB Open Closed Open CACHE ADDRESS CONFIGURATION Size J15 J16 J17 2MB Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed 4MB Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed 8MB Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed CACHE SPEED CONFIGURATION Speed J1/pins 17 & 18 J1/pins 19 & 20 J1/pins 21 & 22 6ns Closed Closed Open 8ns Closed Open Closed » 10ns Closed Open Open 12ns Open Closed Closed 15ns Open Closed Open CPU DIVISOR SELECTION Divisor J1/pins 1 & J1/pins 3 & J1/pins 5 & J1/pins 7 & 2 4 6 8 3 Closed Closed Open Open 4 Closed Open Closed Closed 5 Closed Open Closed Open 6 Closed Open Open Closed 7 Closed Open Open Open 8 (266MHz) Open Closed Closed Closed 9 (300MHz) Open Closed Closed Open 10 (333MHz) Open Closed Open Closed 11 Open Closed Open Open 12 Open Open Closed Closed 13 Open Open Closed Open 14 Open Open Open Closed 15 Open Open Open Open