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In childhood I used to program on MK-61 soviet calculator. It had 4 operating registers (X, Y, Z, T) and 15 storage registers. Program could have 105 steps.

As I recall it had commands like:

• swap X and Y registers
• shift registers (Z to T, Y to Z, X to Y)
• copy from storage register (1..15) to X
• copy from X to storage register (1..15)
• if X < 0 then go to program step ##
• perform operation (+, -, *, /) using X and Y values and put result to X
• etc

Q: Is this command set an assembly language? Did I have a basic idea of assembly languages using this device?

UPDATE Turns out it is something called "keystroke programming"

Funny fact: similar calculator (like this but with energy independent memory) was used as a back-up hardware for space mission trajectory calculations in 1988. :-)

In my childhood I used to program on an MK-61 Soviet calculator. It had four operating registers (X, Y, Z, T) and 15 storage registers. A program could have 105 steps.

As I recall it, it had commands like:

• Swap X and Y registers
• Shift registers (Z to T, Y to Z, X to Y)
• Copy from storage register (1..15) to X
• Copy from X to storage register (1..15)
• If X < 0 then go to program step ##
• Perform operation (+, -, *, /) using X and Y values and put result to X

Is this command set an assembly language? Did I have a basic idea of assembly languages by using this device?

It turns out it is something called "keystroke programming".

Funny fact: a similar calculator (like this one, but with energy independent memory) was used as a back-up hardware for space mission trajectory calculations in 1988. :-)

Excuse me if it's off topic - perhaps you can advise where I can ask then.

In childhood I used to program on MK-61 soviet calculator. It had 4 operating registers (X, Y, Z, T) and 15 storage registers. Program could have 105 steps. As I recall it had commands like:

• swap X and Y registers
• shift registers (Z to T, Y to Z, X to Y)
• copy from storage register (1..15) to X
• copy from X to storage register (1..15)
• if X < 0 then go to program step ##
• perform operation (+, -, *, /) using X and Y values and put result to X
• etc

Q: Is this command set an assembly language? Did I have a basic idea of assembly languages using this device?

UPDATE Turns out it is something called "keystroke programming"

Funny fact: similar calculator (like this but with energy independent memory) was used as a back-up hardware for space mission trajectory calculations in 1988. :-)

In childhood I used to program on MK-61 soviet calculator. It had 4 operating registers (X, Y, Z, T) and 15 storage registers. Program could have 105 steps.

As I recall it had commands like:

• swap X and Y registers
• shift registers (Z to T, Y to Z, X to Y)
• copy from storage register (1..15) to X
• copy from X to storage register (1..15)
• if X < 0 then go to program step ##
• perform operation (+, -, *, /) using X and Y values and put result to X
• etc

Q: Is this command set an assembly language? Did I have a basic idea of assembly languages using this device?

UPDATE Turns out it is something called "keystroke programming"

Funny fact: similar calculator (like this but with energy independent memory) was used as a back-up hardware for space mission trajectory calculations in 1988. :-)