IBM Keypunch Machine Simulator

Interactive 80-column punched-card simulator

IBM KEY PUNCH
80-COLUMN CARD SYSTEM
NO CARD
Column: —
Cards punched: 0
Capacity: 80
Mode: ALPHA
Each text-file line becomes one punched card. Lines shorter than 80 characters are padded with blanks. Lines longer than 80 characters are truncated at column 80.
CARD 1 — PUNCHING COLUMN 1
IBM 80-COLUMN PUNCHED CARD
Each keystroke punches the current column and advances the card. Existing punches cannot be erased, similar to a real keypunch. Press Enter to eject the current card.
Virtual Keyboard
No punched-card deck loaded.

Operation

Letters and digits use a simplified IBM/Hollerith-style 12-row representation. A–I use zone 12, J–R use zone 11, and S–Z use zone 0. Digits punch their corresponding numeric row. Spaces advance without punching. Printed characters are centered directly over their corresponding punch columns.
Insert a blank card to begin.

Output Hopper

IBM-style keypunch educational simulator