![]() He increments the counter, so that next time he comes it will be one larger. The little man starts by looking at the counter for number, which is a mailbox number. Likewise the little man can write 3-digit notes and put them in the out tray, to be read by the user. The user can put slips of paper with 3 digits on in the input tray, to be read when the little man next looks at his in tray. The input and output trays can each contain stack of slips of paper, each of which has 3-digits on. The 2-digit counter has two buttons: the first button increments the counter by 1, the second (external) button resets the counter to 00. It also has an LED that lights up when a larger number is subtracted from a smaller number. The calculator that can only display 3 digits on the screen, and has buttons for numbers 0-9 and + and. Each mailbox contains a slip of paper with 3 digits on it, and can only ever contain a single slip of paper at a time. The mailboxes each have a 2-digit address, so 100 mailboxes is the limit, counting from 00 to 99. The conceit is that inside the CPU is a tiny man that runs around organising data and performing the calculations. Although it seems simplistic, in fact the model captures many important features of a real CPU and illustrates these in an accessible way. The Little Man Computer is a conceptual model of a simple CPU, introduced by Dr. ![]() You may get an alert about an unidentified developer, but click through and it should be okay. Once the file has downloaded, unzip and run the exe file in the folder. If not you need to adjust your settings in System Preferences>Security.įor Windows: LittleManComputer1.2.zip. Whe you first run it, your OS may complain that it is from an unidentified developer: you should be able to right click on the applicaiton, select open and then run it. Once the disk image is mounted, drag the LMC application to the Applications folder to install. Online Demo version: Click here to try it ONLINEįor Mac OS X: LittleManComputer1.2.dmg. ![]()
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