Expanded assembly examples
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README.md
54
README.md
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@ -601,6 +601,60 @@ The machine `tty` includes a tty IO device.
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- Reading from address `0x7FF` inputs an ASCII/UTF-8 character.
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### Assembly Example
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Included in the repo is an `examples` directory. Inside there is the
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file `test1.s`. It contains a simple assembly program to calculate and output
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the fibonacci sequence.
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```
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; Kyler Olsen - Feb 2024
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; Example 1 - ytd 12-bit Computer
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; Fibonacci
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; .0x5
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main:
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; Initialize Fibonacci values
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ldi 1
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or D0 MP ZR
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or D1 ZR ZR
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or D2 ZR ZR
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loop:
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; Output current value
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liu 0x1f
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lil 0x3D
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str D0
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; Move values down
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or D2 D1 ZR
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or D1 D0 ZR
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; Add last two values to get the next value
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add D0 D1 D2
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ldi :loop
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or PC MP ZR
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```
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We can assemble and link it using the following command. **Notice: Python 3.12
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or higher is required for `pytd12dk`.**
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```
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python3 -m pytd12dk am examples/test1.s -o bin/a.out
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```
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We can then execute the binary using the included emulator. We should see the
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fibonacci sequence printed to the console. We can use `ctrl` + `c` to exit the
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emulator.
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```
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python3 -m pytd12dk em bin/a.out
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```
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Also inside the `examples` directory there is a Hello World program in the
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file `test2.s`.
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## ytd12nc
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`ytd12nc` (ytd 12-bit native compiler) is a compiler and assembler with linker
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@ -1,4 +1,4 @@
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; Yeahbut - Feb 2024
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; Kyler Olsen - Feb 2024
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; Example 1 - ytd 12-bit Computer
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; Fibonacci
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@ -0,0 +1,135 @@
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; Kyler Olsen - Mar 2024
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; Example 2 - ytd 12-bit Computer
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; Hello World
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ldi :main
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or PC MP ZR
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print:
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dec SP SP
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; Output current value
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liu 0x1F
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lil 0x3F
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str D0
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; Return
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inc SP SP
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pop MP
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inc PC MP
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main:
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; Initialize Stack Pointer
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liu 0x3F
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lil 0x3F
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or SP MP ZR
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; 'H' (0x48)
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liu 0x1
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lil 0x08
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'e' (0x65)
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liu 0x1
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lil 0x25
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'l' (0x6c)
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liu 0x1
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lil 0x2c
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'l' (0x6c)
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liu 0x1
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lil 0x2c
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'o' (0x6f)
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liu 0x1
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lil 0x2f
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; ',' (0x2c)
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ldi 0x2c
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; ' ' (0x20)
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ldi 0x20
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'W' (0x57)
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liu 0x1
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lil 0x17
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'o' (0x6f)
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liu 0x1
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lil 0x2f
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'r' (0x72)
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liu 0x1
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lil 0x32
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'l' (0x6c)
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liu 0x1
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lil 0x2c
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; 'd' (0x64)
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liu 0x1
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lil 0x24
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; '!' (0x21)
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ldi 0x21
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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; '\n' (0xa)
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ldi 0xa
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or D0 MP ZR
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ldi :print
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psh PC
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or PC MP ZR
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hlt
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@ -40,4 +40,4 @@ class tty(Device):
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elif index & 0xf == 0xe:
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print(value)
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elif index & 0xf == 0xf:
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print(chr(value), end='')
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print(chr(value & 0x7f), end='')
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@ -269,13 +269,13 @@ class Computer:
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elif instruction & 0xFC0 == 0x80: self.LDI(instruction & 0x3F)
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elif instruction & 0xFC0 == 0xC0: self.LIL(instruction & 0x3F)
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elif instruction & 0xFC0 == 0x100:
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self.LSH((instruction & 0x38) >> 3, instruction & 0x7)
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self.LSH(instruction & 0x7, (instruction & 0x38) >> 3)
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elif instruction & 0xFC0 == 0x140:
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self.RSH((instruction & 0x38) >> 3, instruction & 0x7)
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self.RSH(instruction & 0x7, (instruction & 0x38) >> 3)
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elif instruction & 0xFC0 == 0x180:
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self.INC((instruction & 0x38) >> 3, instruction & 0x7)
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self.INC(instruction & 0x7, (instruction & 0x38) >> 3)
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elif instruction & 0xFC0 == 0x1C0:
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self.DEC((instruction & 0x38) >> 3, instruction & 0x7)
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self.DEC(instruction & 0x7, (instruction & 0x38) >> 3)
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elif instruction & 0xE00 == 0x200:
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self.AND(
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instruction & 0x7,
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@ -429,11 +429,11 @@ class Computer:
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self.program_counter += 1
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def POP(self, REG: int):
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self._mem[self.stack_pointer] = self.get_reg(REG)
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self.set_reg(REG, self._mem[self.stack_pointer])
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self.program_counter += 1
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def PSH(self, REG: int):
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self.set_reg(REG, self._mem[self.stack_pointer])
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self._mem[self.stack_pointer] = self.get_reg(REG)
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self.program_counter += 1
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def LIU(self, Immediate: int):
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