Introduction to the Kenbak-1 SKIP Instruction The Kenbak-1 SKIP Instruction allows us to skip an instruction in memory. We base this on a certain bit at a memory cell being high or low. Let’s say we only want to display odd numbers. If bit zero is high on the value Read More »
Introduction to the Kenbak-1 SET Instruction The Kenbak-1 SET Instruction allows us to turn a bit on, or shut a bit off within a byte. This is a two byte instruction. The first byte contains the instruction. The second byte contains the address to be operated on. For this exercise, Read More »
Introduction to Kenbak-1 Shift and Rotate Instructions Kenbak-1 Shift and Rotate Instructions allow us to manipulate data at a memory location by moving bits around within a byte. Specifically, the “A” or “B” Register. This is a 1-byte instruction. Not only is this good for cosmetic appearance of your project, Read More »
Introduction to Kenbak-1 Overflow and Carry Registers Kenbak-1 Overflow and Carry Registers will tell us when a math instructions results in a value that is out of range. In this post, we’ll discuss all values in OCTAL. Keep in mind the Kenbak-1 always thinks in BINARY. At the same time, Read More »
Introduction to the Kenbak-1 Jump and Mark (JMD) Instruction The Kenbak-1 Jump and Mark (JMD) allows us to create “Subroutines” that we can use over and over again. Generally, we can use this for delay loops, common math conversions, or anything else we need to do more than once in Read More »
