6. SYSTEM FEATURES

6.1System Resources

The table below lists the default system resources utilized by the circuits on Prometheus.

Device

Address (Hex)

IRQ

DMA

Serial Port COM1

I/O 3F8-3FF

4

-

 

 

 

 

Serial Port COM2

I/O 2F8 – 2FF

3

-

 

 

 

 

Serial Port COM3

I/O 3E8 – 3EF

4

-

 

 

 

 

Serial Port COM4

I/O 2E8 – 2EF

3

-

 

 

 

 

Parallel Port LPT1

I/O 378 – 37F

7

3

 

 

 

 

IDE Controller

I/O 1F0 – 1F7

14

-

 

 

 

 

Floppy Controller

 

 

-

 

 

 

 

USB

 

11

-

 

 

 

 

6.2CPU Chip Selects

The ZF Micro CPU chip contains 4 user-configurable I/O chip selects and 4 user-configurable memory chip selects. These chip selects are visible in the BIOS setup screens. I/O chip selects 1 and 2 are used for the two serial ports COM3 and COM4. I/O chip selects 0 and 3 are not used.

Chip Select

Function

Mode

Address Range

I/O Size

Window Size

0

Not used

--

--

--

--

 

 

 

 

 

 

1

COM3

R/W

3E8 – 3EF

8 bits

8 bytes

 

 

 

 

 

 

2

COM4

R/W

2E8 – 2EF

8 bits

8 bytes

 

 

 

 

 

 

3

Not used

--

--

--

--

 

 

 

 

 

 

These chip select settings should not be modified unless you need to change the addresses of one or more of the affected circuits for a special system configuration and are fully aware of the impact of your changes.

Prometheus-LC CPU User Manual V1.0

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Diamond Systems PR-Z16-LC-ST user manual System Features, System Resources, CPU Chip Selects
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Low-Power PC/104 CPU Board With ZFx86 Processor, PR-Z16-LC-ST specifications

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