Epson 4000 - Manual (Page 118)

Keyboard PS/2 compatible keyboard interface built
into main system board; 6-pin, mini DIN
connector
Mouse PS/2 compatible mouse interface built into
main system board; 6-pin mini DIN
connector
Option slots Three 16-bit, full-length and two B-bit,
half-length I/O expansion slots, ISA
compatible, 8.33 MHz bus speed
Speaker Internal
Muss
storage Internal mounts:
Two 3½-inch wide, half-height drives
Externally accessible mounts:
One 3½-inch wide, third-height drive and
one 5¼-inch wide, half-height drive
Diskette drives
Your system supports the following
diskette drives:
3.5-inch diskette drive, 1.44MB
(high-density) storage capacity
5.25-inch diskette drive, 1.2MB
(high-density) storage capacity
3.5-inch diskette drive, 720KB
(double-density) storage capacity
5.25-inch diskette drive, 360KB
(double-density) storage capacity
Specifications A-3