AST RESEARCH, INC. Bravo LC 4/66D Processor 80486SX/80486DX2 (on external CPU/Cache module) Processor Speed 25/66I MHz (only with external CPU/Cache module) Chip Set AST Max. Onboard DRAM 64MB SRAM Cache 256KB (on external CPU/Cache module) BIOS AST Dimensions 254mm x 338mm I/O Options Bus mouse port, CPU/Cache upgrade module, floppy drive interface, IDE interface, LAN module, parallel port, serial port (2), VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 2 (COM2) J12 Floppy drive J24 interface Parallel port J13 External speaker J27 Bus mouse port J14 Fan power J28 LAN module J15 & J16 Front panel J29 switches & LEDs Serial port 1 (COM1) J17 Feature connector J46 VGA port J18 CPU/Cache upgrade J50, J51, module J52, J53 VGA pass-through J19 IDE interface LED J100 IDE interface J22 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Factory configured - do not E1 open alter » Factory configured - do not E2 pins 2 & 3 alter closed » Parallel port interrupt E5 pins 2 & 3 select IRQ7 closed Parallel port interrupt E5 pins 1 & 2 select IRQ5 closed » CMOS memory normal operation E6 open CMOS memory clear E6 closed » VGA port enabled SW1/switch 1 closed VGA port disabled SW1/switch 1 open » Password check enabled SW1/switch 2 open Password check disabled SW1/switch 2 closed » Factory configured - do not SW1/switch 3 open alter » Factory configured - do not SW1/switch 4 open alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 256K x (1) 256K x NONE NONE 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 VRAM CONFIGURATION Size VRAM 512KB (4) 44256 [Image] PROCESSOR/CACHE MODULE CONNECTIONS Purpose Location CPU/Cache upgrade module J50, J51, J52, J53 Note: Connections are on the back side of the module and correspond to the connector with the same label on the motherboard. CACHE CONFIGURATION Size Cache SRAM 256KB (8) 256K x 1 CPU/CACHE MODULE TYPE CONFIGURATION Module Type Jumper E4 Jumper E5 Jumper E7 Jumper E8 CPU only open closed closed closed Cache only closed open open open » CPU and closed closed open open Cache Note:These settings are given for information only and should not be changed. CPU SPEED CONFIGURATION Internal External Jumper E1 Jumper E3 Jumper E6 25MHz 25MHz closed closed open 33MHz 33MHz open closed open 50MHz 25MHz closed closed open » 66MHz 33MHz open closed open Note:These settings are given for information only and should not be changed. CPU TYPE CONFIGURATION CPU Type Jumper E2 Jumper E9 Jumper E10 Jumper E11 » 80486DX2 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed ODP486SX pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 80486DX pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed 80487SX pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed closed 80486SX pins 1 & 2 pins 2 & 3 pins 2 & 3 open closed closed closed None open open open open Note:These settings are given for information only and should not be changed.