Monthly Archives: August 2005

Today, while thinking how the heck I’m going to integrate my 3mbps Parallax USB to Serial converter, I was trying to figure out exactly how many different possibilities there are coming out of an Amiga floppy drive. Since there are … Continue reading →

When in doubt, just throw some more money at the problem! Actually, I’m kidding. But I do have the Parallax USB2SER on its way — maybe the USB will be much faster, buffered, and more reliable. Those Ramtron chips should … Continue reading →

I was doing some more tests trying to get the PC to fail. It seems that the PC really likes EVEN delays between data, and it’s wierd because faster data that comes in evenly is better than slower data that … Continue reading →

I took David’s advice, and I rewrote the code last night. Some highlights: 1. ISR is entirely in assembly. Although I haven’t manually counted, it appears to be about 400ns in length. 2. ISR triggers only due to an edge … Continue reading →

Although its ugly, the new code is here. This shows the entire ISR in assembly now. I do like it much better. Tonight I happened to transfer a track that has a good sector. The sector header passed checksum, as … Continue reading →

I’ve been thinking more and more about how exactly I’ve been losing data. It’s alot of data. The worst case I’ve seen is about 140 bytes. This is 1120 bits, or 2240us. This is a LONG time for my SX … Continue reading →

I know I’ve been bad keeping you guys updated….. This doesn’t mean I haven’t been working on it, however. I recoded the ISR completely in assembly because I was just plain sick of the damn mandatory 27 cycles worth of … Continue reading →