IBM CI5VGM Series user manual Address, COM2, RS-232, RS-422, RS-485, Function

Chapter 2 Installations

JP6: DiskOnChip BIOS Expansion Address Select

JP6				Address		JP6				Address
			D0000-D7FFF						D8000-DFFFF
					1		2	3		(default)
1	2	3

J11: RS232/422/485 (COM2) Selection

COM1 is fixed for RS-232 use only.

COM2 is selectable for RS232, RS-422 and RS-485.

The following table describes the jumper settings of this connector.

COM2		RS-232					RS-422					RS-485
Function
								1-2					1-2
								3-4					3-4
Jumper								5-6					5-6
Setting								7-8					7-8
(pin closed)			all			11-12							9-10
		jumpers				15-16					11-12
			open			17-18					13-14
						19-20					15-16
						23-24					17-18
											19-20
											21-22
											23-24
		1	•	•	2		1	•	•	2		1	•	•	2
		3	•	•	4		3	•	•	4		3	•	•	4
		5	•	•	6		5	•	•	6		5	•	•	6
		7	•	•	8		7	•	•	8		7	•	•	8
	9		•	•	10	9		•	•	10	9		•	•	10
Jumper	11		•	•	12	11		•	•	12	11		•	•	12
	13		•	•	14	13		•	•	14	13		•	•	14
Illustration
	15		•	•	16	15		•	•	16	15		•	•	16
	17		•	•	18	17		•	•	18	17		•	•	18
	19		•	•	20	19		•	•	20	19		•	•	20
	21		•	•	22	21		•	•	22	21		•	•	22
	23		•	•	24	23		•	•	24	23		•	•	24
			J11					J11					J11

22 CI5VGM User’s Manual