Fluxengine scratchpad
Hardware connections
- Flat cable pin 1 to the micro-USB side.
- Non-inverted floppy connection to the drive! Red wire to the dent side. This is the same for 5"1/4 and 8" disks.
Turn on the FD FIRST, and connect the fluxengine usb cable AFTER. Drive must turn LED on for about 2 seconds, eventually parking the head.
If LED is fixed ON, this means some cable are upside down!
./fluxengine rpm must read the rpm speed. WITH A DISK INSIDE
Test cases
- IBM PC 360K disk on 360KB drive: ./fluxengine read ibm -s:t=0-40 -o petacci.img
- ???IBM PC 1.2MB on 1.2MB drive: ./fluxengine read ibm -o petacci.img (to be tested)
- IBM PC 360K Floppy disk on a 1.2MB DRIVE: ./fluxengine read ibm -s:t=0-79x2 -o petacci12.img
- Read data and flux, IBM PC 360KB Disk on 360K drive: fluxengine read ibm -s:t=0-40 --retries=0 --revolutions=10 --overwrite --write-flux=testdisk.flux
- M20: con drive da 1.2MB: fluxengine read ibm --retries=10 --revolutions=10 --write-flux=testdisk.flux
8 inches
- fluxengine read ibm -s:t=0-76 --retries=1 --revolutions=3 --overwrite --write-flux=prova.flux -o prova.img
77?
- nome="prova"; fluxengine read ibm --retries=1 --revolutions=3 --overwrite --write-flux=^Come.flux --visualiser-period=167 --write-svg=$nome.svg -o $nome.img
svg test:
- seq 1 380 | while read i; do fluxengine read ibm -s prova.flux --visualiser-period=$i --write-svg=$i.svg ; done
echo usage: leggi name nome=$1 # normale 0.2, --bit-error-threshold=0.4 da provare in caso di errori anali # :s=0 single side read fluxengine read ibm -s:t=0-77 --retries=100 --revolutions=5 --bit-error-threshold=0.4 --overwrite --write-flux=$nome.flux -o $nome.img 1>$nome.log 2>&1 & #fluxengine read ibm -s:t=0-77 --retries=10 --revolutions=5 --bit-error-threshold=0.4 --overwrite --write-flux=$nome.flux -o $nome.img 1>$nome.log 2>&1 & #fluxengine read ibm -s:t=0-77 --retries=5 --revolutions=5 --bit-error-threshold=0.5 --overwrite --write-flux=$nome.flux -o $nome.img 1>$nome.log 2>&1 & tail -f $nome.log # --revolutions=X: when reading, spin the disk X times. X can be a floating # point number. The default is usually 1.25. Some formats default to 1. # Increasing the number will sample more data, and can be useful on dubious # disks to try and get a better read. # # --pulse-debounce-threshold controls whether FluxEngine ignores pairs of # pulses in rapid succession. This is common on some disks (I've # observed them on Brother word processor disks). # # --clock-interval-bias adds a constant bias to the intervals between pulses # before doing decodes. This is very occasionally necessary to get clean # reads - for example, if the machine which wrote the disk always # writes pulses late. If you try this, use very small numbers (e.g. 0.02). # Negative values are allowed. # # Both these parameters take a fraction of a clock as a parameter, and # you'll probably never need to touch them.