EPM-14 Reference Manual
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System Resources and Maps
Memory Map
The lower 1 MB memory map of the EPM-14 is arranged as shown in the following table.
Various blocks of memory space between C0000h and FFFFFh can be shadowed. CMOS Setup is
used to enable or disable this feature.
Table 16: Memory Map
Start Address
End Address
Comment
E0000h
FFFFFh
System BIOS
DC000h
DFFFFh
Reserved
C8000h
DBFFFh
PC/104
C0000h
C7FFFh
Video BIOS
A0000h
BFFFFh
Video RAM
00000h
9FFFFh
System RAM
I/O Map
The following table lists the common I/O devices in the EPM-14 I/O map. User I/O devices
should be added using care to avoid the devices already in the map as shown in the following
table.
Table 17: I/O Map
I/O Device
Standard I/O Addresses
Special Control Register
1D0h
PLD Revision and Type Register
1D1h
Jumper and Status Register
1D2h
Reserved
1D4h – IDCh
COM/ISA IRQ Routing
1DDh – 1DEh
Primary Hard Drive Controller
1F0h – 1F7h
COM3 Serial Port
3E8h – 3EFh
COM2 Serial Port
2F8h – 2FFh
COM1 Serial Port
3F8h – 3FFh
Note
The I/O ports occupied by on-board devices are freed up when the device is
disabled in the CMOS setup. This does not apply to SPI and Reserved registers.
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