Appendix f-specifications, Cpu and memory, Specifications – Epson 386/25 User Manual
Page 293: Appendix f
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