Controllers - Epson Equity 4 User Manual

Video RAM
Shadow RAM
Cache
Math
coprocessor
Clock/
calendar

Controllers

Video
Diskette
Hard disk
A-2 Specifications
512KB or 1MB DRAM on main system
boar& 512KB configuration expandable
to 1MB
Supports shadowing of system and video
BIOS ROM into RAM
8KB of internal cache (built into the
microprocessor)
On 4DX/33 and 4DX2/50 systems, math
coprocessor built into the microprocessor;
optional 487 upgrade available for 4SX/25
system
Real-time clock, calendar, and CMOS
RAM socketed on main system board with
built-in battery backup
Cirrus® VGA controller on main system
board; provides resolutions up to
1024 x 768
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 controllers