ISA

CommaISA

Version: 0.0.3, 12|7|2023

Simplified Instruction Set Architecture:

Data Types:

• Byte: 8 bits
• Word: 32 bits
• Doubleword: 64 bits
• Floating-point: 32 bits
• Double-precision floating-point: 64 bits

Registers:

• 16 general-purpose registers (r0-r15)
• 1 program counter (PC)
• 1 stack pointer (SP)
• 1 frame pointer (FP)
• 1 condition code register (CCR)

Instruction Set:

• Load/Store Instructions:
  • LD (Load): Load a value from memory to a register
  • ST (Store): Store a value from a register to memory
• Arithmetic Instructions:
  • ADD: Add two values
  • SUB: Subtract two values
  • MUL: Multiply two values
  • DIV: Divide two values Logic Instructions:
  • AND: Bitwise AND two values
  • OR: Bitwise OR two values
  • XOR: Bitwise XOR two values
  • NOT: Bitwise NOT of a value
  • Control Flow Instructions:
  • JMP (Jump): Unconditional jump to a label
  • JEQ (Jump if Equal): Jump to a label if two values are equal
  • JNE (Jump if Not Equal): Jump to a label if two values are not equal
  • CALL: Call a subroutine
  • RET (Return): Return from a subroutine
  • CMP (Compare): Compare two values and set the condition code register
  • BNE (Branch if Not Equal): Branch to a label if the condition code register is not equal
  • BEQ (Branch if Equal): Branch to a label if the condition code register is equal
• Expansion Instructions:
  • NOP (No Operation): Do nothing
  • HALT: Stop the CPU
• Video Processing Instructions:
  • LDV (Load Video): Load a video frame from memory to a video processing register
  • STV (Store Video): Store a video frame from a video processing register to memory
  • DRAW: Draw a video frame from a video processing register to the screen
  • SYNC: Synchronize the video processing unit with the CPU

Version: 0.0.2, 29|05|2023

More registers, audio processing, extended datatypes:

Data Types:

• Byte: 8 bits
• Halfword: 16 bits
• Word: 32 bits
• Doubleword: 64 bits
• Quadword: 128 bits
• Floating-point: 32 bits
• Double-precision floating-point: 64 bits

Registers:

• 32 general-purpose registers (z0-z31)
• 1 program counter (PC)
• 1 stack pointer (SP)
• 1 frame pointer (FP)
• 1 condition code register (CCR)

Instruction Set:

• Load/Store Instructions:
  • LD (Load): Load a value from memory to a register
  • ST (Store): Store a value from a register to memory
• Arithmetic Instructions:
  • ADD: Add two values
  • SUB: Subtract two values
  • MUL: Multiply two values
  • DIV: Divide two values
  • REM: Remainder of division
• Logic Instructions:
  • AND: Bitwise AND two values
  • OR: Bitwise OR two values
  • XOR: Bitwise XOR two values
  • NOT: Bitwise NOT of a value
• Control Flow Instructions:
  • JMP (Jump): Unconditional jump to a label
  • JEQ (Jump if Equal): Jump to a label if two values are equal
  • JNE (Jump if Not Equal): Jump to a label if two values are not equal
  • JGT (Jump if Greater Than): Jump to a label if the first value is greater than the second value
  • JLT (Jump if Less Than): Jump to a label if the first value is less than the second value
  • CALL: Call a subroutine
  • RET (Return): Return from a subroutine
  • CMP (Compare): Compare two values and set the condition code register
  • BNE (Branch if Not Equal): Branch to a label if the condition code register is not equal
  • BEQ (Branch if Equal): Branch to a label if the condition code register is equal
  • BGT (Branch if Greater Than): Branch to a label if the condition code register is greater than
  • BLT (Branch if Less Than): Branch to a label if the condition code register is less than
• Video Processing Instructions:
  • LOADVID (Load Video): Load a video frame from memory to a video processing hardware
  • DRAW (Draw): Draw an image to the video processing hardware
  • SYNC (Synchronize): Synchronize the video processing hardware with the CPU
• Audio Processing Instructions:
  • LOADAUD (Load Audio): Load an audio sample from memory to an audio processing hardware
  • PLAY (Play): Play an audio sample
  • PAUSE (Pause): Pause playback of an audio sample
  • STOP (Stop): Stop playback of an audio sample
• Expansion Instructions:
  • NOP (No Operation): Do nothing
  • HALT: Stop the CPU

This new ISA is more effective, efficient, and sophisticated than the previous one. It has a wider range of data types, more instructions, and better support for multimedia processing.

Version: 0.0.1, 12|05|2023

New and improved, overhauled ISA:

Data Types:

• Byte: 8 bits
• Halfword: 16 bits
• Word: 32 bits

Registers:

• 16 general-purpose registers (R0-R15)
• 1 program counter (PC)
• 1 stack pointer (SP)

Instruction Set:

Load/Store Instructions:

• LD (Load): Load a value from memory to a register
• ST (Store): Store a value from a register to memory

Arithmetic Instructions:

• ADD: Add two values
• SUB: Subtract two values
• MUL: Multiply two values
• DIV: Divide two values

Logic Instructions:

• AND: Bitwise AND two values
• OR: Bitwise OR two values
• XOR: Bitwise XOR two values

Control Flow Instructions:

• JMP (Jump): Unconditional jump to a label
• JEQ (Jump if Equal): Jump to a label if two values are equal
• JNE (Jump if Not Equal): Jump to a label if two values are not equal
• JGT (Jump if Greater Than): Jump to a label if the first value is greater than the second value
• JLT (Jump if Less Than): Jump to a label if the first value is less than the second value
• CALL: Call a subroutine
• RET (Return): Return from a subroutine

Input/Output Instructions:

• IN: Read a byte from an input port
• OUT: Write a byte to an output port

Video Processing Instructions:

• LOADVID (Load Video): Load a video frame from memory to a video processing hardware
• DRAW (Draw): Draw an image to the video processing hardware
• SYNC (Synchronize): Synchronize the video processing hardware with the CPU

Expansion Instructions:

• NOP (No Operation): Do nothing
• HALT: Stop the CPU