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Copy pathOne Chunk Man ISA v5.mm
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One Chunk Man ISA v5.mm
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<richcontent TYPE="DETAILS">
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<p style="margin-top: 0">
An Instruction Set Architecture with recommended microcode. Designed by Nathan Fritzler with major feedback from Isaac Fritzler. A similar (earlier) work by Wyatt Brannon may have had some influence in the design of this ISA.
</p>
<p style="margin-top: 0">
This ISA is designed for use in a Minecraft CPU, and is optimized for a small die size.
</p>
<p style="margin-top: 0">
</p>
<p style="margin-top: 0">
version 5
</p>
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<p style="text-align: right">
RAM
</p>
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<html>
<head>
</head>
<body>
<p>
Max size is max number that can be stored in a register
</p>
<p>
Min length is 50 or so
</p>
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</node>
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<p>
Communication from things outside of computer
</p>
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<p>
Communication to things outside of computer
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<body>
<p>
A place to store things
</p>
<p>
Min size should be as long as the tape.
</p>
<p>
Defaults to zeros.
</p>
</body>
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</richcontent>
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<p>
Fastest at Write. Is changed by almost everything.
</p>
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<p>
Can only be modified by MATH, SW and IO
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<head>
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<p>
Like a register, but can't be directly accessed by the progammer.
</p>
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<node TEXT="[@]" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_632789344" CREATED="1607219779816" MODIFIED="1607577167416"><richcontent TYPE="DETAILS">
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<head>
</head>
<body>
<p>
Current state determines what Instruction the computer is currently doing. Can only be set to the current value in the tape. (and is only modified by {GO})
</p>
</body>
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</node>
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<head>
</head>
<body>
<p>
Can only be read by the memory system that manages current location, but can be written by any Instruction (or signal?) This address is effectivly the "current location"
</p>
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<html>
<head>
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<p>
Basically Microcode.
</p>
<p>
Before sending a signal, wait for things to be done. (we might not need to wait if the player directly sent this signal?)
</p>
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</richcontent>
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<p>
Starts as off.
</p>
<p>
User can turn it on or off. (with a lever?)
</p>
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<p style="text-align: left">
{OVERFLOW}
</p>
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<richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
Starts as off.
</p>
<p>
Turned on whenever there's an overflow, and oft used in conditional statements
</p>
</body>
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</richcontent>
</node>
<node TEXT="{GO}" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_1870565492" CREATED="1607219742934" MODIFIED="1607304749201"><richcontent TYPE="DETAILS">
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<p>
Monostable
</p>
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<node TEXT="Wait until {POWER} signal is on" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1725614072" CREATED="1607224035873" MODIFIED="1607577141493" LINK="#ID_685222002"/>
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<p>
Monostable
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<p>
Monostable
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<node TEXT="Send {GO} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1393818571" CREATED="1607223735834" MODIFIED="1607577185902" LINK="#ID_1870565492"/>
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<p>
Does nothing. Moves on to the next instruction.
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</head>
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<p>
Should prevent the computer from doing anything else
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<head>
</head>
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<p>
Alternatively, literally don't do anything. As long as you never send {GO} or {STEP} then this will also work. We would only change {POWER} if that would make the user experience better.
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<head>
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<body>
<p>
Most used. Swaps [A] and [B]
</p>
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<node TEXT="Swaps values stored in [A] register and [B] register" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_87717248" CREATED="1607225734926" MODIFIED="1607577372486" LINK="#ID_249625636"/>
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<head>
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<body>
<p>
Puts the next value in ram in [A]
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<node TEXT="Get (GET, 4)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_551750208" CREATED="1607224451403" MODIFIED="1615421748407"><richcontent TYPE="DETAILS">
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<head>
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<body>
<p>
Get value at ram position [B] and put it in [A]
</p>
<p>
In some architectures this would be called "load"
</p>
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<node TEXT="Set [A] register to the number at [B] in the ram" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1018453250" CREATED="1607228208571" MODIFIED="1615422622795" LINK="#ID_1134177843"/>
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<node TEXT="Set (SET, 5)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_1775466053" CREATED="1607224800546" MODIFIED="1615423853658"><richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
Inverse of GET (put value in [A] in the ram at location [B])
</p>
<p>
In some architectures this would be called "store"
</p>
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<node TEXT="Set the number that's in the ram at [B] to the value in the [A] register" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1529112546" CREATED="1607227990672" MODIFIED="1615423934667" LINK="#ID_1134177843"/>
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<head>
</head>
<body>
<p>
Conditionally move to [B]
</p>
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<node TEXT="If {OVERFLOW} is on" LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_1586555808" CREATED="1607225208609" MODIFIED="1613540948462" LINK="#ID_1134177843">
<font BOLD="true" ITALIC="false"/>
<node TEXT="Set [#] bank to the number in [B]" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1855447397" CREATED="1607228208571" MODIFIED="1615424161852" LINK="#ID_1134177843"/>
<node TEXT="Send {GO} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_196256595" CREATED="1607225290716" MODIFIED="1607577336830" LINK="#ID_1870565492"/>
</node>
<node TEXT="else" LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_587045414" CREATED="1607225222996" MODIFIED="1607305580747">
<font BOLD="true" ITALIC="false"/>
<node TEXT="Send {STEP} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_676337795" CREATED="1607225353544" MODIFIED="1607577341621" LINK="#ID_943501620"/>
</node>
</node>
<node TEXT="Read Input (READIN, 7)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_398636506" CREATED="1607224576012" MODIFIED="1615428065085" LINK="#ID_1901169444"><richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
Reads GPIO and puts it in [A]
</p>
</body>
</html>
</richcontent>
<node TEXT="Change the value of [A] register to <IN>" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_962490077" CREATED="1607227803978" MODIFIED="1613540064777" LINK="#ID_851196832"/>
<node TEXT="Send {STEP} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1361778221" CREATED="1607227918927" MODIFIED="1607577531781" LINK="#ID_943501620"/>
</node>
<node TEXT="Send Output (SENDOUT, 8)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_1429088621" CREATED="1607224576012" MODIFIED="1615428069821" LINK="#ID_1901169444"><richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
Sends GPIO the value in [A]
</p>
</body>
</html>
</richcontent>
<node TEXT="Change the value of <OUT> to [A]" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_818595852" CREATED="1607227776838" MODIFIED="1607577489057" LINK="#ID_1420013192"/>
<node TEXT="Send {STEP} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1772424617" CREATED="1607227918927" MODIFIED="1607577531781" LINK="#ID_943501620"/>
</node>
<node TEXT="Addition (ADD, 9)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_571965779" CREATED="1607224357409" MODIFIED="1615428073725">
<node TEXT="Change [A] register to its old value plus [B]" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_1411012962" CREATED="1607225466513" MODIFIED="1613540256567" LINK="#ID_249625636"/>
<node LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_692768372" CREATED="1613540260781" MODIFIED="1615428634788"><richcontent TYPE="NODE">
<html>
<head>
</head>
<body>
<p>
<b>IF there was an overflow</b>
</p>
</body>
</html>
</richcontent>
<node TEXT="Turn on {OVERFLOW}" ID="ID_305778451" CREATED="1613540294037" MODIFIED="1615511030151" LINK="#ID_1629027373"><richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
A note about overflows: If the max num is 32 and you add 4 to 30, [A] will be 2 and this flag will be on.
</p>
</body>
</html>
</richcontent>
</node>
</node>
<node LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_1680655672" CREATED="1613540329053" MODIFIED="1615428641897"><richcontent TYPE="NODE">
<html>
<head>
</head>
<body>
<p>
<b>else</b>
</p>
</body>
</html>
</richcontent>
<node TEXT="Turn off {OVERFLOW}" ID="ID_1085315900" CREATED="1613540359196" MODIFIED="1615511073909" LINK="#ID_1629027373"/>
</node>
<node TEXT="Send {STEP} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_698389274" CREATED="1607225658538" MODIFIED="1607577358696" LINK="#ID_943501620"/>
</node>
<node TEXT="Subtraction (SUBTRACT, 10)" LOCALIZED_STYLE_REF="AutomaticLayout.level,3" ID="ID_485093458" CREATED="1607224357409" MODIFIED="1615428076830">
<node TEXT="Change [A] register to its old value minus [B]" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_862871649" CREATED="1607225466513" MODIFIED="1613540533624" LINK="#ID_249625636"/>
<node LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_1877242778" CREATED="1613540260781" MODIFIED="1615428641910"><richcontent TYPE="NODE">
<html>
<head>
</head>
<body>
<p>
<b>IF there was an overflow</b>
</p>
</body>
</html>
</richcontent>
<richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
Technically, this would be an underflow, but in the end it's the same thing inside some ALUs
</p>
</body>
</html>
</richcontent>
<node TEXT="Turn on {OVERFLOW}" ID="ID_527701796" CREATED="1613540294037" MODIFIED="1615511041363" LINK="#ID_1629027373"><richcontent TYPE="DETAILS">
<html>
<head>
</head>
<body>
<p>
A note about overflows: If the max num is 32 and you subtract 7 from 2, [A] will be 27 (that's 32-5) and this flag will be on.
</p>
</body>
</html>
</richcontent>
</node>
</node>
<node LOCALIZED_STYLE_REF="AutomaticLayout.level,4" ID="ID_1814996520" CREATED="1613540329053" MODIFIED="1615428720793"><richcontent TYPE="NODE">
<html>
<head>
</head>
<body>
<p>
<b>else</b>
</p>
</body>
</html>
</richcontent>
<node TEXT="Turn off {OVERFLOW}" ID="ID_172275938" CREATED="1613540359196" MODIFIED="1615511062551" LINK="#ID_1629027373"/>
</node>
<node TEXT="Send {STEP} signal" LOCALIZED_STYLE_REF="defaultstyle.attributes" ID="ID_521454858" CREATED="1607225658538" MODIFIED="1607577358696" LINK="#ID_943501620"/>
</node>
</node>
</node>
</map>