Epson 4DX/33, 4DX2/50, 4SX/25 manual

EPSON Equity 4SX/25,4DX/33, and 4DX2/50

power	hard disk	diskette	power
(SPEED) light	access light	drive	button

bay for hard disk, diskette, tape, CD-ROM, or other drive

11 O/220 VAC switch	option card slots
.

Computer	Specifications
CPU and Memory
32-bit CPU	4SX/25: Intel® #36SX, 25 MHz
	microprocessor; can be replaced with
	optional 487SX/25 or ODP486-25
	OverDriv&” processor
	4DX/33: Intel i486DX, 33 MHz
	microprocessor; can be replaced with
	optional ODP486-33 OverDrive processor
	4DX2/50: Intel i486DX2,50 MHz
	microprocessor
System speed	High and low speeds available; high speed
	depends on CPU (25 MHZ, 33 MHz, or
	50 MHz), low speed is simulated 8 MHz

speed; speed selection through keyboard command; 0 wait state memory access at highspeed

	To select low speed, press the Ctrl, Alt,
	and - keys simultaneously. To select
	high speed, press the Ctrl, Alt, and + keys
	simultaneously. (Use the - or + key on the
	numeric keypad.)
Memory	4MB RAM standard on a SIMM;
	expandable using lMB, 4MB, or 16MB
	SWIMS to 32MB (maximum); SlMMs must
	be 36-bit, fast-page mode type with 70ns
	(or faster) access speed
ROM	128KB system BIOS, video BIOS, and
	SETUP code located in EPROM on main
	system board
Video RAM	512KB DRAM on main system board,
	expandable to 1MB
Shadow RAM	Supports shadowing of system and video
	BIOS ROM into RAM
Cache	8KB of internal cache (built into the
	microprocessor)
Math	On 4DX/33 and 4DX2/50 systems, math
coprocessor	coprocessor built into the microprocessor;
	optional 487 upgrade available for 4SX/25
	system
Clock/calendar Real-time clock, calendar, and CMOS
	RAM socketed on main system board with
	built-in battery backup

Video	Cirrus® VGA controller on main system
	board; provides resolutions up to
	1024 x 768
Diskette	Controller on main system board supports
	up to two diskette drives or one diskette
	drive and one tape drive
Hard disk	Interface on main system board supports
	up to two IDE hard disk drives with
	built-in controllers

Monitor	VGA interface built into main system
	board for analog or multifrequency VGA
	monitor; 15-pin, D-shell connector
Parallel	One standard 8-bit parallel, uni- or bi-
	directional interface built into main system
	board; I/O address selectable through
	SETUP; 25-pin, D-shell connector
Serial	Two RS-232C, programmable,
	asynchronous interfaces built into main
	system board; 9-pin, D-shell connectors

EPSON Equity-l