Difference between revisions of "EDSAC"
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Conceived in 1946 and the machine did its first calculation in the summer of 1949 | Conceived in 1946 and the machine did its first calculation in the summer of 1949 | ||
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| + | Order Codes | ||
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| + | {|class="wikitable" | ||
| + | |- | ||
| + | | Order || Description | ||
| + | |- | ||
| + | | A n || Add the number in storage location n into the accumulator | ||
| + | |- | ||
| + | | S n || Subtract the number in storage location n from the accumulator | ||
| + | |- | ||
| + | | H n || Copy the number in storagae location n into the multiplier register | ||
| + | |- | ||
| + | | V n || Multiply the number | ||
| + | |- | ||
| + | | *Z || Multiply the number | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | *The addresses in these order codes need not be zero. | ||
| + | ** The addresses in these orders may be k.p-2 where k is odd, provided that the addresses do not exceed 2047. | ||
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{{stub}} | {{stub}} | ||
[[Category:Computers]] | [[Category:Computers]] | ||
Revision as of 22:19, 18 May 2007
Conceived in 1946 and the machine did its first calculation in the summer of 1949
Order Codes
| Order | Description |
| A n | Add the number in storage location n into the accumulator |
| S n | Subtract the number in storage location n from the accumulator |
| H n | Copy the number in storagae location n into the multiplier register |
| V n | Multiply the number |
| *Z | Multiply the number |
*The addresses in these order codes need not be zero. ** The addresses in these orders may be k.p-2 where k is odd, provided that the addresses do not exceed 2047.
