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🎓 Topic output --- Show an example program #133
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include program and show state image
commit 2b7a076c80f571cff44f36a8418cda9e9e3b90b6
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Original file line number | Diff line number | Diff line change |
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@@ -20,6 +20,83 @@ Including Output in the System | |
Example of Outputting from the System | ||
===================================== | ||
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following same as before adding two numbers | ||
keep it simple though | ||
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Load data straight to registers | ||
output addition | ||
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load to ram | ||
put into regs | ||
get addition | ||
output addition to output | ||
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The below table is the program | ||
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Address register and RAM in/out are excluded for space | ||
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.. list-table:: Add 15 and 4, and output the result | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. |
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:widths: auto | ||
:align: center | ||
:header-rows: 1 | ||
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* - :math:`A` | ||
- :math:`B` | ||
- :math:`ALU_{o}` | ||
- :math:`sub` | ||
- :math:`out_{i}` | ||
- :math:`sign` | ||
- | ||
- :math:`D` | ||
- | ||
- :math:`C` | ||
* - ``1/0`` | ||
- ``0/0`` | ||
- ``0`` | ||
- ``0`` | ||
- ``0`` | ||
- ``0`` | ||
- | ||
- ``0x0F`` | ||
- | ||
- ``C`` | ||
* - ``0/0`` | ||
- ``1/0`` | ||
- ``0`` | ||
- ``0`` | ||
- ``0`` | ||
- ``0`` | ||
- | ||
- ``0x04`` | ||
- | ||
- ``C`` | ||
* - ``0/0`` | ||
- ``0/0`` | ||
- ``1`` | ||
- ``0`` | ||
- ``1`` | ||
- ``0`` | ||
- | ||
- ``Z`` | ||
- | ||
- ``C`` | ||
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* The below image shows the state of the system after adding 15 and 4 together and outputting the result | ||
* Due to the output register, the computer could continue to operate while still outputting this value | ||
* In other words, the control signals could change, along with the data on the bus, and the output would remain | ||
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* Unless new data was put into the output register | ||
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.. figure:: esap_alu_ram_output_displaying_19.png | ||
:width: 500 px | ||
:align: center | ||
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ESAP system outputting 19 on the seven segment displays. This would be the final state of the system after executing | ||
the program described in the above table. | ||
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For Next Time | ||
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green and green aren't very distinguishable imo
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I agree. Currently a limitation of the system. Someone made an issue related to this.
hneemann/Digital#1308