Packard Bell 386 25 (Rev. F) M/Board

386 25 Rev F Motherboard Diagram

Specification

There are two motherboard versions. Rev. D has all simm sockets grouped together, Rev. F has them arranged in two groups.

Battery : DS1287 soldered on Motherboard
BIOS : 2 X 32K Phoenix 1.10.19C2 BIOS. To access setup, Ctrl+Alt+Ins
Bus Architecture : ISA based system bus
Cache : 64K, 35 ns
CPU : 80C386DX-25 MHz. Keyboard Switchable Ctrl-Alt-1 = 8 MHz, Ctrl-Alt-2 = 25 MHz. Use number keys on numeric pad.
Interfaces :
- 1 DB-25 Parallel Port
- 2 DB-9 Serial ports
- 1 Keyboard Port
- 1 Ext. VGA Conn 15 pin
RAM : 4MB standard Maximum on Motherboard 8 MB
Speaker : Piezoelectric, soldered on motherboard
Video : Oak, Trident, PBVGA Multi, or SVGA

Function	Jumper	Description
SIMM Speed	E47-E48 E48-E49	100ns 85ns
SIMM Type	E42-E43, E44-E45 E42-E43, E45-E46 E41-E42, E44-E45	Static Column Fast Paged Standard RAS/CAS
Total RAM	E35-E36, E30-E31, E33-E34, E39-E40 E32-E33, E35-E36, E39-E40, E30-E31 E33-E34, E36-E37, E38-E39, E29-E30 E32-E33, E36-E37, E38-E39, E29-E30	1MB 2MB 4MB 8MB
ROM Size	E23-E24 E24-E25	64K 128K
Monitor Type	E18-E19 E17-E18	Colour Monochrome
Printer Acknowledge	E2-E3 E3-E4	Leading Edge Trailing Edge
Parallel Port	E5-E6 E6-E7 E8-E9 E9-E10	LPT1 Enabled LPT1 Disabled LPT2 Enabled LPT2 Disabled
Serial Port	E11-E12 E12-E13 E14-E15 E15-E16	COM1 Enabled COM1 Disabled COM2 Enabled COM2 Disabled

Battery : DS1287 soldered on motherboard.
Maths Co-Processor : This system supports the 80387SX-25 math co-processor. It is installed at location U41. No jumper settings are required.
RAM : 4MB standard Maximum on Motherboard 8 MB. This board will accept RAS/CAS, Fast-Paged, or Static Column memory upto 8MB. SIMM Speed either 80ns or 100ns (100ns recommended). See the jumpers section for necessary jumper changes when upgrading memory.