Epson 4000 - Manual (Page 117)

Math
coprocessor
Clock/
calendar
On DX and DX2 systems, math
coprocessor built into the microprocessor
Real-time clock, calendar, and CMOS
RAM socketed on main system board with
built-in battery backup
Controllers
Video
Diskette
Hard disk
Interlaces
Monitor
Parallel
Serial
Super VGA high-speed local bus with
True Color support; provides resolutions
up to 1280 x 1024 in 256 colors
Controller on main system board supports
up to two diskette drives or one diskette
drive and one tape drive
High-speed, 32-bit local bus IDE interface
on main system board supports up to two
IDE hard disk drives with built-in
controller; BIOS provides hard disk
auto-sensing function
VGA interface for fixed or multi-frequency
monitor built into system board; 15-pin,
D-shell connector
One standard B-bit parallel interface built
into main system board; 25-pin, D-shell
connector
Two RS-232C, programmable,
asynchronous interfaces built into main
system board; 9-pin, D-shell connectors
A-2 Specifications