Epson EL 486UC - Manual (Page 114)

lnterfaces
Monitor
Parallel
Serial
VGA interface for fixed or multi-frequency
monitor built into system board; 15-pin,
D-shell connector
One standard S-bit parallel bi-directional
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
Keyboard PSI 2 compatible keyboard interface built
into main system board; 6-pin, mini DIN
connector
Mouse PSI 2 compatible mouse interface built into
main system board; 6-pin mini DIN
connector
Option dots Three 16-bit, full-length and two S-bit,
half-length I/O expansion slots, ISA
compatible, 8.33 MHz bus speed; on
systems upgraded to a DX or DX2
processor, one 16-bit slot may be
unavailable because of the CPU heat
sink/ fan assembly
Speaker Internal
Specifications A-3