A virtual machine that interprets custom bytecode to control a wifi led strip
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LED Strip VM
A virtual machine for controlling a wifi led strip.
The assemblerish language and bytecode
Instructions
| assy |
meaning |
bc |
| exit <rg> |
exists the program with exit code <rg> |
0x01 |
| set <byte> <rg> |
sets the register rg to the static value <byte> |
0x02 |
| copy <rg> <rg> |
copies the value of register a into register b |
0x03 |
| load (rgp, rgd) |
loads the value the pointer register points to into the data register |
0x04 |
| clear <rg> |
clears a register (sets it to 0x00) |
0x05 |
| write (rgd, rgp) |
writes the value in the data register to the address of the pointer register |
0x06 |
| label (rgl) |
creates a label with rgd as the name |
0x07 |
| goto (rgl) |
goes to the label with name rgd |
0x08 |
| add (rgd, rgi, rgo) |
adds the value of rgi to the value of rgd and writes the result into rgo |
0x10 |
| sub (rgd, rgi, rgo) |
substracts rgi from rgd and writes the result into rgo |
0x11 |
| mul (rgd, rgi, rgo) |
multiplies rgd by rgi and writes the result to rgo |
0x12 |
| div (rgd, rgi, rgo) |
divides rgd by rgi and writes the result to rgo |
0x13 |
| mod (rgd, rgi, rgo) |
applies mod rgd, rgi and writes the result to rgo |
0x14 |
| lsh (rgd, rgi, rgo) |
bitshifts rgd by rgi to the left and writes the output to rgo |
0x15 |
| rsh (rgd, rgi,rgo) |
bitshifts rgd by rgi to the right and writes the output to rgo |
0x16 |
| jg (rgd, rgi, rgl) |
jumps to rgl if rgd > rgi |
0x20 |
| jl (rgd, rgi, rgl) |
jumps to rgl if rgd < rgi |
0x21 |
| je (rgd, rgi, rgl) |
jumps to rgl if rgd == rgi |
0x22 |
| pause (rgd) |
pauses for rgd milliseconds |
0xF0 |
| cmd (rgd) |
executes the command in rgd |
0xF1 |
Registers
| register |
type |
size |
number |
| rcs |
state register |
1 bit |
0x01 |
| rcr |
red value |
1 byte |
0x02 |
| rcg |
green value |
1 byte |
0x03 |
| rcb |
blue value |
1 byte |
0x04 |
| rgd |
data |
4 bytes |
0x05 |
| rgp |
pointer |
4 bytes |
0x06 |
| rgi |
input |
4 bytes |
0x07 |
| rgo |
output |
4 bytes |
0x08 |
| rgl |
label |
4 bytes |
0x09 |
- changing the state register results in turning the strip on/off
- changing the r/g/b registers results in changing the color
- the rgd register is the default register for storing data
- the rgp register stores a pointer to "memory" space
- the rgi register stores the input for operations that require two input values
- the rgo register stores the result of operations
- the rgl register stores as label name that can be jumped to
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