Specifications

Chapter 1: Product Description
3
• A24/A16/D16/D08 VME master/slave support
• Slot 1 system controller functions
• One EXM expansion slot
It should be noted that, due to mechanical limitations, the EPC-6A cannot support EXMs
such as EXM-9, EXM-MX, EXM-16, EXM-23, EXM-19, EXM20, EXM-17.
Differences between the EPC-6 and the EPC-6A
The EPC-6A differs from the EPC-6 in the following ways:
EPC-6 EPC-6A
20Mhz 80386SX PCAT design 486DX2 [66Mhz internal speed] with 33Mhz
external bus speed PCAT design
External 16K byte 2 way set-associative
cache
8K- Byte On-Chip Cache
External cache controller
External co-processor option Integrated floating-point unit
AT chip set [ATU + DPU] and separate
memory controller
RadiSys R400 highly integrated single chip system
controller [low cost 208 pin PQFP]
MB dual ported DRAM 4 Megabytes dual ported DRAM on board
Two serial ports Two PC compatible serial ports with 16-Byte FIFO
Up to 512K bytes of programmable flash
memory (for DOS/user applications).
1MB of application flash memory contains Datalight
ROM-DOS 6.22 [rev2]
Up to 512K EPROM (for BIOS, ROM). Separate boot device with reflash option
Award BIOS The System BIOS is based on Phoenix
Technologies NuBIOS revision 4.05.
The Flash File System can be installed as a DOS
device driver.
Flash File System (FFS) support for flash is based
on Phoenix Technologies PicoFlash and includes
read/write capability.
The Xformat based FFS is no
longer supported for Flash.
IRQ12 is not available on EXM bus
VMEbus and Memory Controller Configuration
register (8104h) semantics changed.
System BIOS does not share space in the FBD with
ROMDOS. DOS now resides in the RFA.
EXM-2 and EXM-2A are no longer supported.
32 KB of battery-backed SRAM 128KX8Bit of battery backed SRAM with software
supports only 32KB SRAM.