Here are the very rough first drafts oh the Teacher/Educator edition of CardIAC
Please post up ideas and the like here. Thanks
Summer Of CardIAC
Translation Team Alert!!!!
I have started working on a PrintYourOwn version based on several existing documents. I have pulled together the text and words I want to put on this version which I am calling the Teachers/Educators Edition.
Here is the text file of the English Text. If you are able we need as many translations as we can get. I will take your translated files and construct language specific versions .
Thanks in advance…
CARDIAC (CARDboard Illustrative Aid to Computation) is a learning aid developed by David Hagelbarger and Saul Fingerman for Bell Telephone Laboratories in 1968 to teach high school students how computers work. The kit consists of an instruction manual and a die-cut cardboard "computer".
The computer "operates" by means of pencil and sliding cards. Any arithmetic is done in the head of the person operating the computer. The computer operates in base 10 and has 100 memory cells which can hold signed numbers from 0 to ±999. It has an instruction set of 10 instructions which allows CARDIAC to add, subtract, test, shift, input, output and jump.
The “CPU” of the computer consists of 4 slides that move various numbers and arrows to have the flow of the real CPU (the user's brain) move the right way. They have one flag (+/-), affected by the result in the accumulator.
Memory consists of the other half of the cardboard cutout. There are 100 cells. Cell 0 is “ROM”, always containing a numeric "1"; cells 1 to 98 are “RAM”; available for instructions and data; and cell 99 can best be described as “EEPROM”.
Memory cells hold signed decimal numbers from 0 to ±999 and are written with a pencil. Cells are erased with an eraser. A “bug” is provided to act as a program counter, and is placed in a hole beside the current memory cell.
CARDIAC has a 10 instruction machine language. An instruction is three decimal digits (the sign is ignored) in the form OAA. The first digit is the op code (O); the second and third digits are an address (AA). Addressing is one of accumulator to memory absolute, absolute memory to accumulator, input to absolute memory and absolute memory to output.
High level languages have never developed for CARDIAC, since they would defeat one of the purposes of the device: to introduce concepts of assembly language programming.
Programs are hand assembled then are penciled into the appropriate memory cells.
CARDIAC Instruction Set
Opcode Mnemonic Instruction Description
0 INP Input Take a number from the input card and put it in a specified memory cell.
1 CLA Clear & Add Clear the accumulator and add the contents of a memory cell to the accumulator.
2 ADD Add Add the contents of a memory cell to the accumulator.
3 TAC Test Accum Performs a sign test on the contents of the accumulator; if minus, jump to a
specified memory cell.
4 SFT Shift Shifts the accumulator x places left, then y places right, where x is the upper
address digit and y is the lower.
5 OUT Output Take a number from the specified memory cell and write it on the output card.
6 STO Store Copy the contents of the accumulator into a specified memory cell.
7 SUB Subtract Subtract the contents of a specified memory cell from the accumulator.
8 JMP Jump Jump to a specified memory cell. The current cell number is written in cell 99. This allows for one level of subroutines by having the return be the instruction at cell 99 (which had '8' hardcoded as the first digit.
9 HRS Halt & Reset Move bug to the specified cell, then stop program execution.
Programs are run by first sliding three slides so that the number in the instruction register equals the number in the memory cell the bug is sitting in. Once that was done the bug is moved to the next memory cell. The user then follows an arrow which will then tell them what to do next. This continues for all of program execution.
For More Information Please Go To
Move Bug Ahead One Cell
Bug To Cell 00
Move Slides To Agree With The Contents Of The Bug's Cell
Move Bug To Cell And Add Orignal Location To Cell 99
Subtract Contents Of Cell From Accumulator
Copy Accumulator To Cell
Copy Contents Of Cell To Output Card And Advance Card
Shift Accumulator Places Left Then Places Righ
Move Bug To Cell
Add Contents of Cell To Accumulator
Set Accumulator To Contents of Cell
Copy Contents Of Input Into Cell And Advnace Card
CardIAC Summer Of Code
June 1 2017 – August 21 2017
Make new code, redo/update the manuals (translations, updates), custom mods, added modules….all this and more. Make it Post It Share It.
Post ideas and submission up here. Spread the word to other CARDIAC enthusiasts.
The Dicebag Dice Rolling Projects running on a working emulator of the soon to be released Adafruit Circuit Playground Express.
Select Switch + Left Button d100 (0-99) Right Button d20 (1-20)
Select Switch – Left Button d12 (1-12) Right Button d06 (1-6)
Red=Tens Place (0-9)
Blue=Ones Place (0-9)
Green=Tens and Ones are the same (00,11,22,33,44,55,66,77,88,99)
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This site is dedicated to the Mathematical Calculation Tools Developed by John Napier."
Quip Of The Day
"By the way, Wilbur Ross was just confirmed at Commerce 72-27, and he has more Russian connections than Aeroflot."
“By the way, Wilbur Ross was just confirmed at Commerce 72-27, and he has more Russian connections than Aeroflot.”
Be Your Own Best Fact Checker
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Kids In Handcuffs
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A joint project by the NBC News Investigative Unit and the NBC Owned Stations shows school discipline is tougher for blacks, kids with disabilities.
Resist Now And Then
“Why do you allow these men who are in power to rob you step by step, openly and in secret, of one domain of your rights after another, until one day nothing, nothing at all will be left but a mechanised state system presided over by criminals and drunks? Is your spirit already so crushed by abuse that you forget it is your right – or rather, your moral duty – to eliminate this system?”— 3rd leaflet of the White Rose