Introduction to the KIM-1 (UNO) 6502 ScoreBoard In this section, we’ll build a KIM-1 (UNO) 6502 ScoreBoard. Basically, you will have the visitor score on the left, and the home score on the right. I’m separating the two displays with the letters “EF” in the center display. (Enemies on left, Read More »
Introduction to the KIM-1 (UNO) 6502 Counter In this post, we’ll build a KIM-1 (UNO) 6502 Counter. We’ll use assembly language for this project. Basically, you can use this code to learn more about assembly. In this project, button #1 will increase the counter. Likewise, button #2 will reset the Read More »
Introduction to the Kim-1 (UNO) GETKEY Routine The Kim-1 (UNO) GETKEY Routine allows us to accept user input. When the user presses a key, we can take action on that key. The GETKEY routine resides at $1F6A on the Kim Uno. In this post, we’ll write a simple program that Read More »
Introduction to the Kim-1 (UNO) SCANDS Routine The Kim-1 (UNO) SCANDS Routine is built into the Kim-1. This allows you to display data on the 6-Segment LED display. Basically, this just takes data from $FB, $FA, and $F9. We simply use the JSR instruction to jump to the subroutine at Read More »
Introduction to Programming the Kim-1 (Uno) Programming the Kim-1 (Uno) is a lot of fun, and you can learn very quickly. You can read the instructions to build the Kim Uno here. In my case, I just downloaded the gerber files, and had the boards made. They are much easier Read More »
Introduction to Altair Front Panel Programming Altair Front Panel Programming allows us to enter a program using the front panel switches. In the early days of computers, terminals were expensive. Most of those who were building the Altair 8800 would enter a program through the front panel switches. The advantage Read More »
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 »
