New: computer-scienceAll contentblurtkractifitzzanburnpostr2cornellbnwphotographybeblurtgamescurationblurtboosterblurtgermandailyinspirationalwordblogphotographyblurtindiaburnblurtlifeblurttribehitamputihHotTrendingNewDAppskrischik in retrocomputing • 23 days agoPX-16C assemblyHow my PC16C assembly went and lessons learned from a noob.krischik in blurtit • 3 years agoCasio fx-602P from 1981 - The best calculator Casio ever made?A video on one of my favourite programmable calculators. I think keystroke programming is an underrated technique. While Basic and later Pascal style languages are more powerful — if you want…krischik in blurtit • 3 years agoHP-16C Programmers CalculatorThe HP-16C is quite a rare calculator from the HP Voyager series. It's made specifically for software developers. While most scientific calculators from the 1990 onwards can convert and display…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 22IRQ Interrupt The interrupt requests are meant to be shared between several advanced devices. The breadboard 65C02 computer has only one of those: The 65C22 VIA (versatile interface adapter).…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 18Add disassembler to monitor As the programs become more complex debugging becomes more difficult at well. All you have are hex codes which you need to interpret yourself: Current Monitor…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 17Now we have some RAM we have stack and can use subroutines to make the program more compact. I already used macros and include files so I can just rewrite the macros and both programs, the one with…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 16Improved Memory Management Unit Ben Eater used a single SN74H00N 4×2 NAND chip as memory management unit which decoded 3 address lines (A13 … A15). This saves integrated circuits but has a…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 15Using a look to make the Hello World more compact! The first version of the Hello World program in bare metal 65C02 assembler was 342 bytes long. That's quite a lot for such a simple assembler…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 14Ben Eater 6502 Kit — Day 13 – Add display and print “Hello, World!” The computer is coming along nicely. Next a Display is added to the system. Adding power Close up The display…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 13Macro Assembler Up until now programming was done in hex code. Which is quite cumbersome and error prone. It's time to switch to more powerful tools. But first I have to repair EEPROM. I pulled…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 12Add VIA (Versatile-Interface-Adapter) In order for something happen a computer need some kind input and output. For 65C02 the best choice of I/O is the 65C22 VIA (Versatile-Interface-Adapter).…krischik in blurtech • 4 years agoBen Eater 6502 Kit — Day 11Add reset vectors to ROM Up until now the 65C02 was only supplied with NOP operation. Including the reset and interrupt vectors making the CPU start execution at EAEA₁₆ while the first address…krischik in blurtit • 4 years agoBen Eater 6502 Kit — Day 7CPU Monitor program One of the advantages of the WD One of the advantages of the WDC60C02 is the fully static design. This makes it possible to stop the CPU clock at any time without the CPU…krischik in blurtit • 4 years agoBen Eater 6502 Kit — Day 6Link breadboards and attach power rails Sadly on day six I didn't get much done as the power supply died on me. And since I don't have another 5V, 2A power supply in my box of old power…krischik in blurtit • 4 years agoBen Eater 6502 Kit — Day 5Finishing the clock module Day 5 and we are still building a clock. But today I finished the clock module. It was fun subproject. Tomorrow I start with the actual computer. The parts…krischik in blurtit • 4 years agoBen Eater 6502 Kit — Day 4Switch De-bouncing We have two clocks, now we need a way to switch between the two. Switches are not as often debounced as buttons but in this case it needs to be done. Ben Eater explains in the…krischik in vintage-computing • 4 years agoBen Eater 6502 Kit — Day 1I have decided to try out the Ben Eater 6502 computer kit. To have some fun. On the first day I set up the power supply. There was a power supply included in with the clock module but that's a is a…
