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Amiga Floppy

inital results on error correction

While I have yet to actually implement the full-scale error correction as I want to, I did some manual tests today. I basically took a track that I was erroring out on, and swapped in 1-bit away values for the bad bytes. In some cases, it appeared...

keith

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Latest articles

Amiga Floppy

SX code

Ok so I’m using SX/B, which is BASIC for the SX. Even if you’ve never touched SX/B, it reads very easily, anyone who knows the PIC or other mcu should understand….. Here’s the logic behind the...

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Amiga Floppy Inactive

motor speed variation tests

I collected roughly 1,000 index pulses from the Sony MPF920-E with one common floppy inserted. The motor speed variation was very very small. I am impressed as to the accuracy. Across 967 index pulses, all were within...

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Amiga Floppy

Using a 74HC132E to square up the wave

A nice gentleman from sci.electronics.* newgroup suggested I use a 74HC132 on his web page here.[local copy] Below is the result of using this design, it worked perfectly. Only required one IC, one resistor, and one...

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Amiga Floppy

sanding a 556 timer IC to expose the die

So tonight, just for the fun of it, I decided to sand, by hand, a 556 timer IC. I just bought an extremely inexpensive microscope and was very interested to see what pictures I could get from it. Unfortunately, for me...

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Amiga Floppy

correctly reading an entire track reliably from PC drive

OK Great news. As I stumbled on in the last post: I’ve fixed my reading issues, and I’m now reliably reading, in one shot, an entire amiga track from the unmodified standard PC drive!! When seeing double...

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Amiga Floppy

still hashing some ideas around

I’ve been getting lots of good ideas from the smart guys over at Parallax. They are throwing out a variety of methods and ways I can get this job done. I will say that I’m a little overwhelmed at the pure...

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Amiga-VSC Inactive

on converting amiga video from 320×200 to 640×400

I had mentioned on the VSC project description page that I am looking at various methods for scaling my digital amiga video output from 320×200 to 640×400. My initial plan was just to do pixel doubling, or...

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Amiga Floppy Inactive

New pictures for FPGA AFP

Here are some new photos for the FPGA version of the AFP.
Click for full size.
Enjoy!

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A501 Replacement Inactive

PCB ordered from Seeed Studio

I placed the order late last night for the PCB! The PCB design is obviously finished, fully passes the kicad DRC checks, the problems with the footprints were solved. I’ve decided to go with Seeed Studio’s...

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Amiga Floppy

FPGA eval board

One of these arrived today. Very cool. I’ve only done minor things with it so far — but I’m learning. I’ve got FPGAs by Example for Verilog coming within a couple days. Looks like a good book...

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