Difference between revisions of "3Com 3C501"

Latest revision as of 14:15, 24 April 2024

A 3C501

The 3C501 from 3Com was a very popular Ethernet interface card for early IBM PCs and IBM-compatible PCs.

ETHERLINK (3C501; ASSY.#1221)

CABLE TYPE SELECTION

Type	Setting
RG-58A/U 50ohm coaxial	Option 1
AUI transceiver via DB-15 port	Option 2

Configuration jumpers

BOOT ROM CONFIGURATION

Setting	JP3
Disabled	Pins 2 & 3 Closed
Enabled	Pins 1 & 2 Closed

I/O BASE ADDRESS SELECTION BOOT ROM CONFIGURATION

Address	JP4	JP5	JP6	JP7	JP8	JP9
300h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2	Pins 1 & 2
310h	Pins 1 & 2	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2	Pins 1 & 2

Note: Pins designated should be in the closed position.

BOOT ROM ADDRESS SELECTION

Address	JP12	JP13	JP14	JP15	JP16	JP17	JP18	JP19
CC000h	Pins 2&3	Pins 2&3	Pins 1&2	Pins 1&2	Pins 2&3	Pins 2&3	Pins 1&2	Pins 1&2
EC000h	Pins 2&3	Pins 2&3	Pins 1&2	Pins 1&2	Pins 2&3	Pins 1&2	Pins 1&2	Pins 1&2

Note: Pins designated should be in the closed position.

DMA CHANNEL SELECTION

Channel	JP26	JP27	JP28	JP29	JP30	JP31
DMA1	Closed	Open	Open	Closed	Open	Open
DMA2	Open	Closed	Open	Open	Closed	Open
DMA3	Open	Open	Closed	Open	Open	Closed

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@@ Line 1: / Line 1: @@
+[[Image:3com 3c501 front.jpg|300px|thumb|right|A 3C501]]
+The '''3C501''' from [[3Com]] was a very popular [[Ethernet]] interface [[printed circuit board|card]] for early [[IBM PC]]s and [[IBM-compatible PC]]s.
 ETHERLINK (3C501; ASSY.#1221)
-[[Image:3com 3c501 front.jpg|300px|thumb|right]]
 {|
@@ Line 114: / Line 116: @@
 |}
 Note: Pins designated should be in the closed position.
+[[Image:3com 3c501 blade.jpg|300px|thumb|right|3C501 cable connections]]
 INTERRUPT REQUEST SELECTION