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oziphantom
Registered: Oct 2014
Posts: 490 |
Write a Disk backwards
Is it possible to write a disk backwards, say take a D64 probably pre flipped and write it backwards. Maybe run the stepper motor backwards? |
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Krill
Registered: Apr 2002
Posts: 2980 |
Write out a double-sided disk using 1571. There you go, backwards on 2nd side when flip-side inserted in a 1541. \=D/ |
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oziphantom
Registered: Oct 2014
Posts: 490 |
that gives you a backwards disk, but doesn't write it backwards. |
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Krill
Registered: Apr 2002
Posts: 2980 |
Okay, so for the umpteenth time (cue link to Wikipedia "XY problem" article), what do you _actually_ want to achieve? |
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iAN CooG
Registered: May 2002
Posts: 3193 |
Turn the 1541 upside down. =) |
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oziphantom
Registered: Oct 2014
Posts: 490 |
To write a disk backwards, basically this gives the opposite of what you described. 1571 only the bottom image is the right way when you flip the disk. |
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Krill
Registered: Apr 2002
Posts: 2980 |
My bad. Doesn't answer the question, though. |
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oziphantom
Registered: Oct 2014
Posts: 490 |
I'll add more words
The goal is to write an image with the 1571 only to have the flip side be the right way when the disk is flipped, i.e consumed by a 1541. |
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Krill
Registered: Apr 2002
Posts: 2980 |
And why would you want to do that? :)
Give us a user story! :D |
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oziphantom
Registered: Oct 2014
Posts: 490 |
Say your a publisher, and you have a popular title that needs both sides of a disk, and you have a popular game on your hands and you have 1000 orders.
So put disk in 1541, tell it to write and verify the image.
Notice that it has finished, stop what you are doing ( folding a box, stapling a manual ), open the drive, flip the disk, close the hatch, start it on the 2nd side.
Go back to what you where doing.
Wait for the 1541 to write and verify the image.
VS
Put disk in 1571 and tell it to go.
Do more stuff while you wait for it to write and verify both sides of the disk.
The 2nd case is going to be a lot more efficient, and allow them to do the orders in less time. Might make a nice little solution to package up and sell to them ;) |
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ChristopherJam
Registered: Aug 2004
Posts: 1409 |
Quote: I'll add more words
The goal is to write an image with the 1571 only to have the flip side be the right way when the disk is flipped, i.e consumed by a 1541.
Probably doable. You just need to flip all the bytes, reverse the buffers, do each sector before each sector header, and place the sync marks at the end of each write instead of the start. No idea if the alignment would be correct..
Start with a custom formatter, edit in those changes, and see if it works! |
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