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5.868 bytes |
Service Hints & Tips |
Document ID: YAST-3GCQZU |
Advanced 3270 (78/79) Emulation Adapter for ISA - Jumper Settings
Applicable to: World-Wide
Resource Information:
Up to 4 cards can be placed in one machine by adjusting dip switches found on the card itself. Each additional card needs separate memory and I/O addresses, but shares irq 2 (which is fixed/hardwired on the card) with the other cards.
Irq: 2 (fixed - hardwired on card.)
Memory Address Range: CE00 - CFFF (memory registers for card info.)
I/O Port Addresses: 02Dx-0EDx (Used by computer to find card.)
Switch 1 & 2 control I/O address. Defaults: 1,2, & 4 On/Switch 3 is off:
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Switch 1 |
Switch 2 |
Description |
I/O Address |
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On |
On |
1st Card |
02Dx |
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Off |
On |
2nd Card |
06Dx |
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On |
Off |
3rd Card |
0ADx |
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Off |
Off |
4th Card |
0EDx |
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Switch 3 |
Description |
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On |
Operate in Slot 8 |
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Off |
Not in Slot 8 |
Cabling issues:
The maximum length of Coaxial cable (RG62A/U) is 4920 feet, anything beyond that is unsupported and may cause connection problems.
Configuration Issues:
The 3270 card is pretty inflexible, it must use the following upper memory range: CE00-CFFF. One must make sure that a
machines Rom Shadowing isn't enabled on this range. You must have an exclusion on your emm386 in dos/win environment or if in win95 reserve this upper memory resource.
Note: The IRQ of the adapter is 2, and this CANNOT BE CHANGED.
Note: Common Cards that cause problems for the 3270 card are Video Adapter ( IRQ 9 -> IRQ 2 ) and Token Ring cards
configured for IRQ 2.
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Hint Category |
Jumper/Switch Settings | |
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Date Created |
21-04-97 | |
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Last Updated |
05-04-99 | |
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Revision Date |
05-04-2000 | |
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Brand |
IBM Options | |
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Product Family |
Emulation Adapters | |
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Machine Type |
3270 | |
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Model |
53F6425 | |
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TypeModel |
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Retain Tip (if applicable) |
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Reverse Doclinks |