Motherboard asrock n100dc-itx no connection with 7i90hd

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02 Jul 2026 20:55 #347470 by telmoram
Hi, i have motherboard asrock n100dc-itx, setup Parallel port to ecp+epp v1.9 but start lunuxcnc i get error invalid cookie, got 0xffffffff, expected 0x55aacafe, please help me. Thanks.

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02 Jul 2026 21:22 #347472 by PCW
Is the 7I90  "BOOT" jumper (W3) set to P?

How long is the parallel cable?

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02 Jul 2026 21:37 #347473 by telmoram
Thanks, Cable (20cm length) and board test with other motherboard and run ok, with the asrock motherboard dont run.

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03 Jul 2026 00:38 #347476 by PCW
Did you try turning off epp_wide mode?

(man hm2_7i90)

I guess some other possibilities are:

Bad parallel port

Wrong base or high address (sometimes the high address is not at the standard 0x400 above the base address)

Bad EPP implementation (this has been seen on some PCI parallel port chips)

You could also  set debug_epp true and see if you get any clues from that

and also check if the parallel port works as expected
 

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