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# Motorola MC14500B Machine CodeMotorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump


The Motorola MC14500B is a 1-bit microcontroller; it has a one 1-bit register and a 1-bit data bus. Since the opcodes are 4 bits each, there are only sixteen; half of them carry out a logical operation between the register and the bit on the data bus.

The jump instruction sets a jump flag; when no address is provided, it is common to set the program counter to 0. If the input bit was zero, the processor will not jump, but if. If the input bit was 1, the processor jumps back to the start. Sincestart; since we're ORing with input, it doesn't matter what the input signal is afterwardsafterwards—the register will then be 1 forever.

As is conventional, the register is initialized to 0.

A list of the opcodes can be found on the data sheet, or here.

# Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump


The Motorola MC14500B is a 1-bit microcontroller; it has a one 1-bit register and a 1-bit data bus. Since the opcodes are 4 bits each, there are only sixteen; half of them carry out a logical operation between the register and the bit on the data bus.

The jump instruction sets a jump flag; when no address is provided, it is common to set the program counter to 0. If the input bit was zero, the processor will not jump, but if the input bit was 1, the processor jumps back to the start. Since we're ORing with input, it doesn't matter what the input signal is afterwards.

As is conventional, the register is initialized to 0.

# Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump


The Motorola MC14500B is a 1-bit microcontroller; it has one 1-bit register and a 1-bit data bus. Since the opcodes are 4 bits each, there are only sixteen; half of them carry out a logical operation between the register and the bit on the data bus.

The jump instruction sets a jump flag; when no address is provided, it is common to set the program counter to 0. If the input bit was zero, the processor will not jump. If the input bit was 1, the processor jumps back to the start; since we're ORing with input, it doesn't matter what the input signal is afterwards—the register will then be 1 forever.

As is conventional, the register is initialized to 0.

A list of the opcodes can be found on the data sheet, or here.

2 added 529 characters in body

# Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump (In many implementations, this resets the program counter to the start)


The Motorola MC14500B is a 1-bit microcontroller that uses 4microcontroller; it has a one 1-bit opcodes;register and a 1-bit data bus. Since the opcodes are 4 bits each, there are only sixteen; half of them carry out a logical operation between the register isand the bit on the data bus.

The jump instruction sets a jump flag; when no address is provided, it is common to set the program counter to 0. If the input bit was zero, the processor will not jump, but if the input bit was 1, the processor jumps back to the start. Since we're ORing with input, it doesn't matter what the input signal is afterwards.

As is conventional, the register is initialized to 0.

## Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump (In many implementations, this resets the program counter to the start)


The Motorola MC14500B is a 1-bit microcontroller that uses 4-bit opcodes; the only register is a bit.

# Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump


The Motorola MC14500B is a 1-bit microcontroller; it has a one 1-bit register and a 1-bit data bus. Since the opcodes are 4 bits each, there are only sixteen; half of them carry out a logical operation between the register and the bit on the data bus.

The jump instruction sets a jump flag; when no address is provided, it is common to set the program counter to 0. If the input bit was zero, the processor will not jump, but if the input bit was 1, the processor jumps back to the start. Since we're ORing with input, it doesn't matter what the input signal is afterwards.

As is conventional, the register is initialized to 0.

1

## Motorola MC14500B Machine Code, 2 bytes

In hex:

58EC


Explanation:

5  OR the register with input from the data bus
8  Write the register to the data bus
E  Skip next instruction if register is zero
C  Jump (In many implementations, this resets the program counter to the start)


The Motorola MC14500B is a 1-bit microcontroller that uses 4-bit opcodes; the only register is a bit.