Epson 386/25 Specifications, Appendix F, CPU and Memory

Appendix F

Specifications

CPU and Memory

32-bit CPU	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
System memory	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
ROM	128KB (includes system BIOS and VGA
	BIOS)
Shadow RAM	0 wait state access speed; automatically
	copies both ROM BIOS and video ROM
	into RAM
Math coprocessor	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)
Clock/calendar	Real-time clock, calendar, and
	50-byte CMOS RAM for configuration;
	battery backup

Specifications F-1