According to Carlos G Mendioroz, who wrote these programs:
Ok, code is not clean at all, but with a little help it should be understandable...
It read the raw dump as 0/1 for sample and makes run length codes of periods (at rising edges). There is a class for doing the timing (finding the first long preamble and then resynching at preambles) and then some utility methods to follow the block structure, decode the gcr 4/5 and calculate CRC.
The main trick ended being variating the timing when an exception occurs and retry decoding a block. it tries -2, -1, +1 and +2 reference periods, which change the 0/1/2 run length boundaries.
Let me know if you need help understanding it. There is no output yet, but having a good CRC kind of proves the decoding of the block was ok (and the block id matching :)
Dedicated to restoring and reading "unreadable", mystery, and unknown format QIC tapes from the 1970s and 1980s
Sunday, April 22, 2018
Sunday, April 15, 2018
MiniPRO TL866 EPROM Reader/Programmer
It's not directly QIC Reader related, but it is a VERY useful tool!
Latest downloads should be at http://www.autoelectric.cn/en/tl866_main.html
Download install file MiniPro_setup670.exe
Supported Chips List:
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