- "To copy Lemmings from original to other disks, Copy II PC Option Board must be needed with weak bit support.
- "Lemmings can't be copied to other disk without Trans Copy Option Board. ... But it can be run on PCE emulator with TD0 format."
- "Lemmings / 1st rivision / Weak bit Copy Protection on Track 0-0"
the old ISA card "Central Point Deluxe Option Board" with "Transcopy" as software component seems to be able to copy Lemmings with its weak bits copy protection.mr.vince wrote:Weak bits can't be copied without parameters or modifying the data. That's the reason weak bits are used.
Where is the problem on the Kryoflux side? Maybe the ancient Transcopy program needs dedicated parameter for the copy protected Lemmings floppy?The Option Board is an add-in disk controller for the IBM PC that can defeat weak-bits schemes, custom formats, long tracks, you name it. 99% of floppies with disk-based protections made before 1990 can be duplicated perfectly by the Option Board
Transcopy stands for "Transition Copier", which describes how it works; it simply copies the flux reversals (transitions) on the disk, without a care as to what the data on the disc actually is.
Which tools I can use to do this?mr.vince wrote: You could modify the raw dump for the particular track and inject weak bit data for writing...
Correctmr.vince wrote:To my knowledge Lemmings is DD not HD.
Why I'm asking this? I've bought a original Lemmings 3,5" DD Floppy and play Lemmings on a real 486'er PC. I want to protect the original foppy. Copy the original floppy to an image file and run the game on an emulation is not in scope! If the old Central Point ISA Card was able to copy the game in an easy way why not Kryoflux?
The sole purpose of weak bits is to read differently than written. One can guess by looking at a couple of revolutions and then modify the raw data. I am afraid there's no known tool apart from our own Analyser and Keir's Disk Utilities which create IPFs. The latter is free and open source. That would be the easiest way to do it.
If Lemmings PC uses a variable bit rate (like the Amiga version) then it should copy fine with any recent KryoFlux software release.
If your Lemmings disk is using weak bits or NFAs, you'll need the next update of the KryoFlux software to replicate it - which will be released soon
Please note, that the KryoFlux host software does not "patch" the data or the code; it replicates the disk as is.
OK, but the ancient "CopyIIPC Option Board" ISA card and the related Transcopy softwareIFW wrote:Yes, many of those programs detected the protection type and "patched" either the code or the data.
"it simply copies the flux reversals (transitions) on the disk, without a care as to what the data on the disc actually is."
seems to act similar to Kryoflux and do not do any patching.
It doesIFW wrote: If your Lemmings disk is using weak bits
sounds good. I will test it with the next Kryoflux updateIFW wrote: or NFAs, you'll need the next update of the KryoFlux software to replicate it - which will be released soon
The Analyser you are asking for is an institutional tool with a very different price tag. It's not available for consumers.
I don't care if the copy is protected too as in an exact clone I just care that it can be backed up.
Whatever feature is coming: from the product description KF is an imaging device this is what matters (to us). As good is it is and will be in regard to writing we will never advertise or guarantee any cloning abilities.
KryoFlux can perfectly write any data - if it's correctly described. The format description for KF raw stream is open. The IPF decoder is open. Just program your own raw stream or IPF and it will perfectly be written to disk. Yes, you will need to know or learn about floppy coding for this.
EDIT: Regardless of if you care about it KryoFlux will never crack or modify data. This is not what preservation stands for and it's illegal in most countries. Period.