Niklas Hallqvist says that the jumpers are:

Beside the TGA memory, four arranged like:

	back of machine

		2  1
		2  1

		8  4
		8  4

	front of machine


(actually, he said something different, but a bit of cross-checking
with other TGA board docs indicates that the numberings above are the
right ones. 8-)

Anyway, the settings are and/or seem to be (table typed in from the
ZLXp-E[123] owner's guide):

setting	pixel freq	resolution	refresh rate	Notes
	(MHz)				(Hz)
------- ----------	----------	------------	-----
0	130		1280x1024	72		1
1	119		1280x1024	66		1
2	108		1280x1024	60		1
3	104		1152x900	72		1
4	93		1152x900	66		1
5	75		1024x768	70		1 (default)
6	74		1024x768	72		1
7	69		1024x864	60		2
8	65		1024x768	60
9	50		800x600		72
10	40		800x600		60
11	32		640x480		72
12	25		640x480		60
13	135		1280x1024	75
14	110		1280x1024	60		1
15	... reserved ...				3

1: Niklas and his monitor experimentally confirmed these
2: Niklas and his monitor experimentally determined that this was
   actually:
	??		1152x900	60
3: Niklas and his monitor experimentally determined that this was
   actually:
	??		1280x1024	72


I'd trust the table except for the entry for setting 7 -- see note
2.  I'm not sure i'd use setting 15.




chris