Epson EL 486UC - Manual (Page 113)

Memory
relocation
Cache
Supports relocation of 256KB of memory
from A0000h to BFFFFh and D0000h to
EFFFFh to extended memory
8KB of internal cache (built into the
microprocessor); supports 64KB, 128KB, or
256KB of external cache using 28-pin,
8K x 8,20ns DIP chips or 28-pin, 32K x 8,
20ns DIP chips
Math Math coprocessor built into the
coprocessor microprocessor for DX and DX2 systems
Clock/
calendar
Contained in the 82C491 system controller
along with 64 bytes of CMOS RAM;
backed up by a soldered NiCad
rechargeable battery
Controllers
Video
Diskette
Hard disk
Trident® 8900CL VGA controller on main
system board; provides resolutions up to
1024 x 768 in 16 colors (up to 1024 x 768 in
256 colors with 1MB of video memory)
Controller on main system board supports
up to two diskette drives or one diskette
drive and one tape drive
Interface on main system board supports
up to two IDE hard disk drives with
built-in controller; BIOS provides hard
disk auto-sensing function
A-2 Specifications