So, maybe if i went with something like this https://www.amazon.com/Adapter-Serial-C ... B075N82CDL
Would I just be able to run dupont connector wires to the appropriate pins?

board.png

Hello all, its been a long time since I posted something. I recently picked up one of these guys: https://wdc65xx.com/Single-Board-Computers/w65c02sxb/
I'm not much of a hardware guy I'l have to admit. So, I wanted something that had real hardware that I could write my software for. So ...

@GarthWilson yes sir! That would be most helpful. If I go the Z80 route a UART is definitely in the plans.

So i researched a bit and found a schematic of the TRS-80 Model I. I see there's a "cassette in" and "cassette out" circuit. Doesn't look like any special ICs were used. I'm trying to extrapolate the principles to understand the context.

Here's the source of my pics http://www.1000bit.it/support ...

Hi there all,

TL;DR I need a circuit for connecting a tape interface to a simple 8-bit computer...

I have aspirations to create my own hombrew CPU. I have a few ideas so far about what it will do. One of the things that I love
about 1980's micros (believe me or not) are cassette interfaces. I ...

There are many software implementations of the 6502 which is now owned by Western Digital. Zilog still owns the Z80 and still makes it.
I know that it is illegal for video game emulators to reverse engineer proprietary hardware. Also, it is obviously illegal to distribute proprietary
ROM images such ...

I was reviewing a hexdump of the Pitfall! binary...
I've been memorizing opcodes and thought I would try my hand at manual disassembly. Mostly for the heck of it.
Up until now, I've always relied on an assembler to handle everything. However, here's what I find when I do a raw hexdump:


$ hexdump ...

This may be the wrong forum, but I'm hoping I catch the attention of an old-school Apple ii dev.
I have been writing so programs for the Apple //e and I'm really enjoying it. I've broken away from
Atari 2600 development for a bit to see what a real machine can do.

I've played around with Applesoft ...

A few months back, I was inspired by the BMOW project: http://www.bigmessowires.com/category/bmow1/

I know a lot of folks have made these TTL CPUs, and it seemed like a fun, long term project. I've learned quite a bit
about digital logic and feel ready to start playing with actual hardware. I've ...

This looks pretty good for the cost. It doesn't come with a JTAG -> USB cable. I'm wondering if anyone knows of any deals for those. I would hate to spend $40 on one for a $15 board. I've seen them go for like $9 on ebay from China, but I don't know if they would work.

I noticed this video today https://www.youtube.com/watch?v=l5RV6IfVOGY

What type of method is this where the headers are wrapped from the top? Is this conventional?
Also, I imagine he had to solder the pins at the bottom?

I can't help but be jealous when I see excellent penmanship. For instance, take a look at Garth's work here: http://wilsonminesco.com/6502primer/basic6502schem.jpg

I know that everyone is using Eagle, or some other software to draw up schematics these days. But, I happen to love the oldschool way ...

Of course! Shift right, check carry. That's what I get for overthinking it huh?

I'm working on a routine for an Atari 2600 game. The portion of the code is the 192 visible scanlines. I'm attempting to achieve a visual effect by updating the background every other scanline.

The scanline loop simply counts from 192 to 0. In this scheme, #192 represents the top line, #0 the ...

I know this is a 6502 forum, but I am really hoping that some of you might recommend a good solution for assembling / simulating the Z80.

I've looked around, but have either only found DOS based simulators with little documentation, or expensive commercial applications.

I'm just looking for a ...