Control Panel (IBM 1401)Drag • double click: reset position

IBM 1401 Operator Simulator

State: POWER OFF
Mode: READY
Tutorial mode: OFF
Fault: NONE
PowerOFF
Card readerEMPTY
CPUSTOP
PC0
ACC0
Task:
...
Next step: ...
Tip: ...
LogDrag • double click: reset position

Printer / Console

EditorDrag • double click: reset position

Editor

Selected card
Tip: click a Deck card, then edit its Type and Arg fields here.

Memory (M0–M3)

M0
M1
M2
M3
Enter your own numbers. LOAD / ADD / SUB / MUL / DIV / STORE use these values.

Quick help

• Palette: drag a card into the Deck, or press the + button.
• Deck: reorder by dragging, click a card to edit it.
• Run: executes from the start of the Deck until HALT or the end.
• Card order can be changed by dragging or with the ↑ / ↓ buttons.
• If the program already finished: press Machine reset, or Run automatically restarts from the beginning of the Deck.
Deck BuilderDrag • double click: reset position

Instruction palette → Deck (execution order)

Palette grab → drag
DECK (execution order) drop: insert / reorder
Empty deck. Drag cards here from the palette, or press the + button.
HelpDrag • double click: reset position
Interactions
• 3D panel: click the 3D buttons (POWER / RUN / STEP / STOP).
• Deck Builder: grab a card in the palette and drag it into the Deck; cards in the Deck can be reordered.
• Editor: click a Deck card to select it, then edit Type and Arg here.
• Memory: type values into M0–M3, then press Apply memory (optional, but validates, rewrites and logs them).
• Camera: left mouse rotate, right mouse pan, wheel zoom
Tip: the mouse wheel scrolls the log when hovering over it. Over other areas it zooms the camera.