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Appendix f-specifications, Cpu and memory, Specifications – Epson 386/25 User Manual

Page 293: Appendix f

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Appendix F

Specifications

CPU and Memory

32-bit CPU

System memory

ROM

Shadow RAM

Math coprocessor

Clock/calendar

80386 microprocessor, 25 MHz system
clock speed, 25 MHz or simulated 8 MHz

processor speed, selectable through
software or keyboard command

0 wait state memory access speed at

25 MHz

2MB RAM standard on SIMMs; base

memory of either 256KB, 512KB, or
640KB, selectable through jumpers

Memory expandable using 256KB or

1MB SIMMs up to 16MB (maximum);

SIMMs must be 70ns access speed

128KB (includes system BIOS and VGA

BIOS)

0 wait state access speed; automatically
copies both ROM BIOS and video ROM

into RAM

80387 (25 MHz) or Weitek 3167

(25 MHz) support; both may be used when

a Weitek dual coprocessor adapter is
installed to provide an additional socket

(optional)

Real-time clock, calendar, and

50-byte CMOS RAM for configuration;
battery backup

Specifications F-1