Epson ActionPC 5000 User Manual page 119

Memory
ROM
Video RAM
Shadow RAM
Memory
relocation
Cache
Math
coprocessor
Clock/
calendar
A-2 Specifications
4MB or 8MB RAM standard on a SIMM;
expandable to 64MB using 1MB, 2MB,
4MB, 8MB, 16MB, and 32MB SIMMs;
SIMMs must be tin-plated, 72-pin, 32-bit
or 36-bit, fast-page mode type with access
speed of 70ns or faster
128KB Phoenix® system BIOS, video BIOS,
and SETUP code located in EPROM on
main system board
1MB DRAM on main system board;
expandable to 2MB using eight, 4 x 4 x 256
DIP chips
Supports shadowing of system and video
BIOS ROM into RAM
Supports relocation of 256KB of memory
from A0000h to BFFFFh and D0000h to
EFFFFh to extended memory
8KB of internal cache; supports 64KB,
128KB, or 256KB of external cache using
28-pin, 8 x 8 or 32 x 8, 20ns DIP chips
Math coprocessor built into the
microprocessor for DX, DX2, and Pentium
OverDrive systems
Contained in the 82C491 system controller
chip along with 64 bytes of CMOS RAM,
backed up by a soldered NiCad
rechargeable battery