e100lpslave.readme

该文件是rt_linux

***** MODIFICATIONS
To use a 5600 as a slave device it has to somewhat modified.
This has to be done on a 5600 (art no 16144 R2) to automatically set it to parallel port boot mode:

1)
Close to the LPT1 connector there are two resistors, between the "Pulse" inductor and
the LS245. The one closest to the LS245 is a 4k7 pull up (R105). Remove it.

2)
Between the other "Pulse" inductor and Etrax there is a black 5-pin inverter
(D15). Short connectors 2 and 3 with a solder blob.


***** PINOUT
To use this driver use cables connected like this:
DSUB25-Male                DSUB25Male

1	10
2-9	2-9
10 	1
11	14
12	18
13	NC
14	11
15	NC
16	NC	
17	NC
18	12
19	NC
20-25	20-25

Thus the cables are symmetrical with most cables straight through,
some crossed (1-10, 11-14 and 12-18) 
and some Not connected (NC 13,15,16,17 and 19).


******* Only for reference
To ease the use of flat-cable connectors, here are the notes of wich wires to cross and cut with pin 1 being cable 1:
Cross:
1	19
2	21
10	23
Cut:
4
6
8
12
25

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