rename TRENZ define to FORCE_PC3_IDENT and document how to enable the

[usb-driver] / README

diff --git a/README b/README
index 597b1b2313596ef03ba478bf7011ca686f320d06..aa4eefedb363f491bfe71105e07f3bbb3c8f005b 100644 (file)
--- a/README
+++ b/README
@@ -9,6 +9,7 @@ should work on every kernel version which is supported by libusb and supports
 ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with
 the following software:
 
 ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with
 the following software:
 

+ * ISE Webpack 9.1SP3

  * ISE Webpack 9.1SP2
  * ISE Webpack 9.1SP1
  * ISE Webpack 8.2SP3
  * ISE Webpack 9.1SP2
  * ISE Webpack 9.1SP1
  * ISE Webpack 8.2SP3


@@ -71,6 +72,11 @@ ppdev
 To use the device as an ordinary user, put the user in the group 'lp'
 
 
 To use the device as an ordinary user, put the user in the group 'lp'
 
 

+If you have an almost compatible cable which works with other software but not
+with Impact, try adding -DFORCE_PC3_IDENT to the CFLAGS line in the Makefile.
+This enables a hack by Stefan Ziegenbalg to force detection of a parallel cable.
+
+

 Parallel Cable IV is currently only supported in 'compatibility mode', as no
 attempt to configure the ECP registers is done by this library.
 
 Parallel Cable IV is currently only supported in 'compatibility mode', as no
 attempt to configure the ECP registers is done by this library.