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"From IDE to NVMe: A Journey Through the Evolution of Computer Hard Drive Interfaces"

Hard drives are an essential part of any computer system, and they have evolved significantly over the years. One key aspect of this evolution has been the development

Ben Eater 6502 Kit — Day 22

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

Ben Eater 6502 Kit — Day 21

The 65C02 has two interrupt lines: NMI (mon maskable interrupt) and IRQ (interrupt request). It should be noted that IRQ are mend to be shared between interrupt

Ben Eater 6502 Kit — Day 20

The ordered spare parts have arrive and not a minute too late. The poor EEPROM looks pretty beaten: One leg broken off at the case Three legs broken on the opposite

[Global] Stuff I'm doing and musings (01/12/20)

I'm Currently going through the list of stuff in the "Bundle for Racial Justice and Equality" on Itch.io that I bought almost 6 months ago, rather than doing searches

Ben Eater 6502 Kit — Day 19

Up until now the computer was run either by a fairly slow 555 timer or even slower single stepping. This was possible because the WDC-65C02, unlike the R-65C02,

Ben Eater 6502 Kit — Day 18

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 output

An update (27/11/20)

This past week, I've felt pretty tired for some reason, though I suppose lockdown has hit med harder than I thought, making my streaming break an even better idea

Ben Eater 6502 Kit — Day 17

Now 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

Ben Eater 6502 Kit — Day 16

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 few

Ben Eater 6502 Kit — Day 15

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 program. We can certainly

Ben Eater 6502 Kit — Day 14

The computer is coming along nicely. Next a Display is added to the system. Adding power Close up The display hangs a bit over the side of the board as the SN74LS21

Ben Eater 6502 Kit — Day 13

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

Ben Eater 6502 Kit — Day 12

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). It offers

[Global/WP] Future Computer Plans (14/11/20)

Gradually, I’m uninstalling stuff on my Linux data partition, as well as moving files from my Linux and Windows data partition to my external HDD in preparation

Ben Eater 6502 Kit — Day 11

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

Ben Eater 6502 Kit — Day 10

After I checked the CPU by hardcoding a NOP operation with 8 1kΩ resistors the next step is adding a ROM to for the future programs. Or better an EEPROM (electrical

[Global] Update on things (08/11/20)

Edit: This post is from a couple of days ago, but is being posted 1 day late on this platform; this will likely be the only major update for the next few days, so

Ben Eater 6502 Kit — Day 9

Good news. The CPU wasn't damaged after all. The RES (Reset) pin was bent inwards. To bad I didn't make a photo to show how that looked like. Anyway, with the RES