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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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Amiga FloppyInactive

found bug last night

With this new FPGA solution, certain tracks would result in what I call a “short read.”  A short read is any received track that contains less than 28,125 delta T’s, aka pulse times.  Given a certain...

78 views
Amiga Floppy

Good news good news. First perfect .adf

Good news indeed! I’ve managed to create a fully functioning .ADF from a floppy.  I matched the output from my hardware/software combination with a “transdisk” output, and it matches exactly. I used...

78 views
Amiga Floppy

java client works

Well I’m producing correct .ADF’s with the new java client. The terminal mode is also finished and working. I have some various odds and ends to wrap up with it, namely allowing the user to save his...

78 views
Amiga Floppy

updates with FRAM access

My initial attempts to write to the FRAM used SX/B commands like SHIFTIN and SHIFTOUT. These operated at a slow rate of about 83kbits/s. It did work and functioned as a good test of the hardware setup. Now that...

77 views
Amiga Floppy

amiga floppy project activity

I don’t know how interesting this is, but I thought I’d throw it up anyways. I exported the posts and comments tables from the mysql database, imported into Excel, and then created an activity graph of the...

77 views
Amiga Floppy

more success reading valid data!

I created a disk with a textfile called AMIGA on it which contained thousands of “AMIGAAMIGAAMIGA” throughout the entire file. The idea here is that no matter which part I happen to read/decode, I can tell...

76 views
Amiga Floppy

reworking my uart

Well I rewrote my recv and send uart, and with the help of my logic analyzer, I’ve tuned them up pretty good. I’m getting some transfer errors, somehow, and I think its related to buffer size. I read a disk...

76 views
Amiga Floppy

great performance increases

Today I’ve worked on optimizing the performance of the AFP reader and have made great strides. My original track times were nearly 475ms. This was 300ms reading the actual disk, 125ms transferring, and process...

75 views