A few days ago, a friend offered me one set 9750 LEGO Technic Interface A with the Interface Card and Cable (IBM compatible) but without software.

Can someone share the installation software (LEGO Lines, LEGO TC Logo or Logowriter Robotics) or where can I download the original software for IBM PC-DOS??

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    The person behind this link says they have software and cables to interface with this device: lgauge.com – user3971 May 1 '15 at 20:29
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    I had already found the site mentioned by jvd. It contains lots of useful information about the Interface A. What I wanted was to find the original software, especially the LEGO TC Logo for IBM (MS-DOS). – Alberto Santos May 19 '15 at 11:31
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    If you goal is only to be able to use it, it seems faster to hack it using an Arduino and than control it through USB. – pcantin Jul 23 '15 at 1:38

This link to a google drive ZIP file seems to be the ISA card installation documentation and PC-DOS application you are looking for.

More information on using the LEGO Technic Interface A with an Apple II or Commodore 64 can be found here.


The software for Technic Interface A is said to be the same for the lego DACTA interface (aka 'interface B').

Try this download link for lego DACTA control Lab

This eurobricks thread may also be of some use

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