Programming tips for IBM 1401

The most useful IBM 1401 Reference manuals

• Principles of Operation, also known as "The Brownie Book" because of its brown cover. Reference number A24-1403.
• Autocoder assembler. Reference number C24-3319.
• Dataflow. Reference number G24-1377.
• Many more at http://www.bitsavers.org/pdf/ibm/140x

Subjects

• System overview
• Program loading
• Switched branches
• Determine core size
• Clear core