For a complete list of cables and adaptors discussed on these pages, see the cables and adaptors page. If you're having problems with a cable then download XCTest and test your cable with it.
The descriptions and construction guides on these pages are for beginners. If you are a hardware expert then, please, bare with them.
There are four serial cables and two additional parallel cables. These all connect Commodore drives to the PC parallel port. Also, using the serial cables, you can connect a Commodore machine to the PC, too. Depending on what Commodore and PC hardware you have, what operating system you are running on your PC and what transfer speed you want to achieve, you may select among a number of cables and cable pairs. For a detailed guide on selecting, see below.
The cables are the following. For more infos on each cable, follow the link on the cable name.
These are absolutely necessary, no data transfer will work without them.
The X1541 cable is the original cable. It requires an SPP or PS/2 parallel port and it's compatible with all Commodore machines and drives that have the usual serial bus port. However, it's not compatible with the parallel port integrated onto most Pentium and above motherboards.
The XE1541 extended cable is a substitute for the X1541 cable. It's also a serial cable and it's also compatible with all Commodore machines and drives that have the usual serial bus port but it works on all parallel ports, including the ones integrated onto most Pentium and above motherboards (see the info page for exceptions!).
The XM1541 multitask cable is only a bit different from the XE1541 extended cable. It has two wires swapped at the Commodore end of the cable. This allows other transfer software to use interrupts rather than polling to do handshake with the Commodore drive under GNU/Linux. It's a serial cable, it's compatible with all Commodore machines and drives that have the usual serial bus port and it works on all parallel ports, including the ones integrated onto most Pentium and above motherboards (see the info page for exceptions!).
The XA1541 active cable uses transistors and resistors rather than diodes. This makes it the ultimate transfer cable because it works even on those few motherboards that the XE1541 extended cable and the XM1541 multitask cable have problems with. This cable also works under GNU/Linux and is compatible with all Commodore machines and drives that have the usual serial bus port.
These are optional cables, companions to the serial cables, you can't use them alone. All they do is speed up the data transfer.
The XH1541 and XH1571 hybrid cables are companion cables for the X1541 cable. They are compatible with all parallel ports and come in two flavors: the XH1541 hybrid cable for Commodore 1541 drives and the XH1571 hybrid cable for Commodore 1570 and 1571 drives; other drives are not supported. These cables can't be used alone and, effectively, triple the transfer speed in the PC-to-drive direction and speed it up to 150% in the drive-to-PC direction.
The XP1541 and XP1571 parallel cables are companion cables for all four serial cables. They are compatible with PS/2, EPP and ECP parallel ports and come in two flavors: the XP1541 parallel cable for Commodore 1541 drives and the XP1571 parallel cable for Commodore 1570 and 1571 drives; other drives are not supported. These cables can't be used alone and, effectively, triple the transfer speed in both the PC-to-drive and the drive-to-PC direction.
These Y-shaped cables combine a X1541-series serial cable with an X1541-series parallel cable.
XXH1541 cable combo. A pair of X1541 cable and XH1541 or XH1571 hybrid cable, in the form of a Y-shaped cable.
XXP1541 cable combo. A pair of X1541 cable and XP1541 or XP1571 parallel cable, in the form of a Y-shaped cable.
XEP1541 cable combo. A pair of XE1541 extended cable and XP1541 or XP1571 parallel cable, in the form of a Y-shaped cable.
XMP1541 cable combo. A pair of XM1541 multitask cable and XP1541 or XP1571 parallel cable, in the form of a Y-shaped cable.
XAP1541 cable combo. A pair of XA1541 active cable and XP1541 or XP1571 parallel cable, in the form of a Y-shaped cable.
The following adaptors convert an X1541-series cable to another.
XE/M1541 adaptor. Converts an XE1541 extended cable to an XM1541 multitask cable and vice versa.
The following are the equivalents of the X1541-series cable combos. You can plug a Commodore serial cable and, optionally, a Commodore parallel cable onto the adaptor and then plug the adaptor into the PC. This way, you can use the Commodore cables, that you already have, with a PC, too.
XEP1541 adaptor. Serves as a pair of XE1541 extended cable and XP1541 or XP1571 parallel cable, allowing you to reuse your already existing Commodore serial cable and Commodore parallel cable.
XMP1541 adaptor. Serves as a pair of XM1541 multitask cable and XP1541 or XP1571 parallel cable, allowing you to reuse your already existing Commodore serial cable and Commodore parallel cable.
XAP1541 adaptor. Serves as a pair of XA1541 active cable and XP1541 or XP1571 parallel cable, allowing you to reuse your already existing Commodore serial cable and Commodore parallel cable.
If you'd like to buy parts for the cables and adaptors, see the electronical parts page. If you'd like to order any of these cables or adaptors then, please, visit The X1541 Shop.
If this is the first time you encounter the X1541-series cables then it is highly recommended that you read through this whole section. However, if you don't have time for that or this is too much information for you, you may jump to the conclusion right away.
To be able to transfer data between your Commodore drive and your PC, first, you need a serial cable. Note that serial here means that the cable is serial, even if you connect it to the parallel port of the PC. You have four choices:
X1541 cable (recommended for old PC's only!),
If you have the serial cable finished and the transfer software up and running with it and you have a Commodore 1541, 1570 or 1571 drive or compatible clone, you may think of speeding the transfer up with one of the additional cables. Please, note that all these cables need modifications in your Commodore drive. If you're not good at hardware hacking, don't try doing it yourself but ask for an expert's help instead. Also, read the transfer software's documentation on whether it supports these cables. You have two choices:
XH1541/XH1571 hybrid cable (recommended for old PC's only!) and
The following charts describe the compatibility of the cables with different parallel ports and software and how the cables can be used together. This section should be considered as the central collection of the information that you can find on the info pages of each cable.
The serial cables can be used alone. (That is, unless the chosen software requires a parallel cable.) Parallel cables cannot be used alone, they require the presence of a serial cable. However, not all pairs of serial and parallel cables are possible. In general, you should not use the XH1541 hybrid cable at all as it was designed to bring the most out of old PC hardware only. It has been superseded years ago by the XP1541 parallel cable that gives you higher speed on a modern PC and can be used along with all serial cables.
| Serial cable/parallel cable | XH1541 | XP1541 |
|---|---|---|
| X1541 cable | YES | YES |
| XE1541 extended cable | no | YES |
| XM1541 multitask cable | no | YES |
| XA1541 active cable | no | YES |
For most integrated parallel ports on modern PC's, the mode of your parallel port can be viewed and changed in the BIOS setup. For old parallel port cards, you may have to use jumpers or its own software. It may be possible that the BIOS setup or the parallel port software calls parallel port modes differently: "Standard", "Compatible" or "Normal" usually stand for SPP; "BPP" or "Extended" for PS/2. Some BIOS'es display the parallel port mode incorrectly so, after having changed it, check the correct mode as reported by XCTest or The Star Commander.
The very old X1541 cable does not work with the integrated parallel ports of modern PC's, therefore, you should choose it only if you want to use it with an old software and have an old PC for this purpose. The XE1541 extended cable and the XM1541 multitask cable have better compatibility with modern PC's but they may have problems with laptops and a few desktop motherboards (more details on the info pages).
The XA1541 active cable has the best compatibility with parallel ports. Also, the integrated parallel port of modern PC's are all compatible with the XP1541 parallel cable. If you concentrate on hardware compatibility, these two cables are the best choices.
| Cable/port mode | SPP | PS/2 | EPP/ECP |
|---|---|---|---|
| X1541 cable [1] | YES | YES | no |
| XE1541 extended cable [2] | YES | YES | YES |
| XM1541 multitask cable [2] | YES | YES | YES |
| XA1541 active cable | YES | YES | YES |
| XH1541 hybrid cable | YES | YES | YES |
| XP1541 parallel cable | no | YES | YES |
Notes:
You can check if your parallel port is compatible with the X1541 cable with X1541Test.
We found that the this cable doesn't work on certain motherboards and laptops. See the info page more details. On incompatible machines, it is recommended that you use the XA1541 active cable instead. Unfortunately, there's no software that would be able to tell whether your parallel port is compatible with this cable or not.
Following is a compatibility chart of possible combinations of serial and parallel cables with parallel port modes.
| Cable combo/port mode | SPP | PS/2 | EPP/ECP |
|---|---|---|---|
| XXH1541 = X1541 + XH1541 | YES | YES | no |
| XXP1541 = X1541 + XP1541 | no | YES | no |
| XEP1541 = XE1541 + XP1541 | no | YES | YES |
| XMP1541 = XM1541 + XP1541 | no | YES | YES |
| XAP1541 = XA1541 + XP1541 | no | YES | YES |
You may find more information about parallel port modes on The PC parallel port page.
If you are interested in the electronical details of PC parallel ports and the X1541-series cables, please, read the Technical background information section in The Star Commander documentation.
There are two categories for current software, according to the main functionality. A transfer software makes the PC act as a Commodore machine – the master of the serial bus –, letting you access the contents of disks in attached Commodore drives from the PC. A file server or emulator makes the PC act as a Commodore drive – a slave on the serial bus –, letting you access the contents of emulated disk drives from the Commodore machine.
In the past, the XE1541 extended cable was supported by the most software. However, this changed with the introduction of native GNU/Linux and Windows software which support the XM1541 multitask cable and the XA1541 active cable instead. NOTE: An XE1541 extended cable can easily be converted into an XM1541 multitask cable (more details on the info page). Some of the software support the XP1541 parallel cable, as well.
| Software/cable | X1541 | XE1541 | XM1541 | XA1541 | XH15x1 | XP15x1 |
|---|---|---|---|---|---|---|
| 1541EMU [2] | no | no | no | no | no | no |
| 64HDD | YES | YES | no | no | no | no |
| C64S Emulator [1] | YES | no | no | no | no | no |
| cbm4linux | no | no | YES | YES | no | YES |
| OpenCBM/cbm4win | no | no | YES | YES | no | YES |
| Disk64 [1] | YES | no | no | no | no | no |
| nibtools | no | YES | no [3] | YES | no | YES |
| mtap & ptap | YES | YES | no | YES | no | no |
| prlink | YES | no | no | no | no | no |
| The Star Commander | YES | YES | YES | YES | YES | YES |
| Trans64 [1] | YES | no | no | no | no | no |
| VC1541 [1] | YES | YES | no | no | no | no |
| X1541 [1] | YES | no | no | no | no | no |
Notes:
This software has been abandoned. It is not developed anymore, therefore, you should not choose cables according to their compatibility with it. Instead, use another software for the same purpose and see the compatibility of the cables with that one.
This software uses its own cable and it does not support any of the X1541-series interfaces. It is included in the table only for the sake of completeness.
Support for this cable is currently not available in this software but it is planned to be implemented later.
Also, a software compatibility chart for cable combos. Only those software are included that support, at least, one of the X1541-series parallel cables.
| Software/cable combo | XXH1541 | XXP1541 | XEP1541 | XMP1541 | XAP1541 |
|---|---|---|---|---|---|
| cbm4linux | no | no | no | YES | YES |
| OpenCBM/cbm4win | no | no | no | YES | YES |
| nibtools | no | no | YES | no [1] | YES |
| The Star Commander | YES | YES | YES | YES | YES |
Notes:
Support for this cable combo is currently not available in this software but it is planned to be implemented later.
Finally, a compatibility chart between software and non-X1541-series cables. Only those software are included that support, at least, one non-X1541-series cable. This cable is included only for the sake of completeness. You can find the descriptions of these cables on the cables and adaptors page.
| Software/cable | 1541EMU | Power- Loader |
|---|---|---|
| 1541EMU | YES | no |
| 64HDD | no | YES |
| prlink [1] | no | no |
Notes:
This software supports a wide variety of cables. See the software documentation for more information.
Strictly speaking, the cable has nothing to do with the operating system. However, it is possible that the software, that runs under a given operating system, supports only a few cables, not all of them; or, vice versa, the software, supporting a given cable, may run under only a few operating systems, not all of them.
While transfer programs may or may not run properly in multi-tasking environments, such as GNU/Linux, OS/2 or any version of Windows, you must be prepared to boot real DOS on your PC to run file servers and emulators.
The following table shows the compatibility between PC software and PC operating systems. This table is for informational purposes only; because there are so many clones of the original MS-DOS and because there are so many versions of GNU/Linux and Windows, you should see the software documentation for more precise details on compatibility with different operating systems.
| Software/operating system | DOS | Linux | W9X/ME | NT/2K/XP |
|---|---|---|---|---|
| 64HDD | YES | no | no | no |
| C64S Emulator [1] | YES | no | no | no |
| cbm4linux | no | YES | no | no |
| OpenCBM/cbm4win | no | no | no [2] | YES |
| Disk64 [1] | YES | no | no | no |
| nibtools | YES | no | no | no |
| mtap & ptap | YES | no | no | no |
| prlink | YES | no | no | no |
| The Star Commander | YES | yes[4] | YES[3] | yes[4] |
| Trans64 [1] | YES | no | no | no |
| VC1541 [1] | YES | no | no | no |
| X1541 [1] | YES | no | no | no |
Notes:
This software has been abandoned. It is not developed anymore, therefore, you should not choose cables according to their compatibility with it. Instead, use another software for the same purpose and see the compatibility of the cables with that one.
Support for this operating system is currently not available in this software but it is planned to be implemented later.
Steps have been taken in this software to support this operating system. Read the software documentation for instructions and more information.
Steps have been taken in this software to support this operating system but it is, unfortunately, not perfectly stable. Read the software documentation for instructions and more information.
Joining the compatibility table of cables and software with that of software and operating systems, the result is a compatibility table between cables and operating systems.
| Cable/operating system | DOS | Linux | W9X/ME | NT/2K/XP |
|---|---|---|---|---|
| X1541 cable | YES | yes[2] | YES[1] | yes[2] |
| XE1541 extended cable | YES | yes[2] | YES[1] | yes[2] |
| XM1541 multitask cable | YES | YES | YES[1] | YES |
| XA1541 active cable | YES | YES | YES[1] | YES |
| XH1541 hybrid cable | YES | yes[2] | YES[1] | yes[2] |
| XP1541 parallel cable | YES | YES | YES[1] | YES |
Notes:
Steps have been taken in The Star Commander to support Windows 95/98/ME DOS shells. Read the software documentation for instructions and more information. Also, support for Windows 95/98/ME is currently not available in openbm/cbm4win but it is planned to be implemented later.
Steps have been taken in The Star Commander to support GNU/Linux dosemu and Windows NT/2000/XP DOS shells but it is, unfortunately, not perfectly stable. Read the software documentation for instructions and more information.
Don't let the "1541" in the names of the cables fool you: all the serial cables – X1541, XE1541, XM1541 and XA1541 – are compatible with all Commodore drives that have the usual serial port; this includes 1541, 1570, 1571 and 1581 drives and compatible clones and other Commodore drives, too. Also, the serial cable can be plugged into the serial port of a Commodore machine, as well, making the PC emulate Commodore drives; this includes all C64 and C128 flavors. However, it is up to the software whether it can transfer from/to a particular drive or whether it can emulate it. As the 1541 drive is the most popular of all, you can expect all transfer and emulator software to support or emulate it; see the software documentation about support of other drives.
As for hardware compatibility, the XA1541 cable simulates the circuitry found in the serial bus ports of Commodore machines and drives. For this reason, it can cope with multiple devices on the same serial bus, daisy chained with plain Commodore serial cables from the first one that the X1541-series cable is connected to. On the other hand, the XE1541 and XM1541 cables cannot drive the serial bus strong enough in such cases: the result is unreliable data transfer, damaged or lost data. But, for a single Commodore machine or drive connected to the PC, any of the serial cables will do.
The parallel cables are available in two flavors each: the XH1541 and XP1541 cables are for 1541 drives, the XH1571 and XP1571 cables are for 1570 and 1571 drives. The 1541 and 1570/1571 flavors are identical in concept and usage, only their implementation differs, because of the hardware differences between 1541 and 1570/1571 drives. There are no known similar implementations of parallel cables for 1581 drives or other Commodore drives. If you need an additional parallel cable between the PC and a Commodore machine, use the Power-Loader cable instead.
The following cable shows the compatibility between the transfer software and different Commodore drives; "+P" means that an additional parallel connection, via an XP1541/XP1571 parallel cable is also supported. The Commodore drives are supposed to be running in their native mode; the 1541 emulation mode of 1570 and 1571 drives is considered to be identical to genuine 1541 drives.
| Transfer software/drive | 1541 | 1570 | 1571 | 1581 |
|---|---|---|---|---|
| cbm4linux | YES+P | YES+P | YES+P | no |
| OpenCBM/cbm4win | YES+P | YES+P | YES+P | no |
| Disk64 [1] | YES | no | no | no |
| nibtools | YES+P | no | no | no |
| mtap & ptap [2] | no | no | no | no |
| prlink | YES | no | no | no |
| The Star Commander | YES+P | YES+P | YES+P | YES[3] |
| Trans64 [1] | YES | no | no | no |
| X1541 [1] | YES | no | no | no |
This software has been abandoned. It is not developed anymore, therefore, you should not choose cables according to their compatibility with it. Instead, use another software for the same purpose and see the compatibility of the cables with that one.
This software has been designed to transfer data from/to Commodore datasettes, therefore, it does not support any Commodore drive. It is included in the table only for the sake of completeness.
Not all functions, related to this drive, have been implemented in this software. See the software documentation for the current implementation status.
The following table show which drives file server or emulator software can emulate; "+P" means that an additional parallel connection, via a Power-Loader cable is also supported; "+T" means that (most!) disk turbos are also supported.
| Server software/drive | 1541 | 1570 | 1571 | 1581 |
|---|---|---|---|---|
| 1541EMU [2] | YES+T | no | no | no |
| 64HDD | YES+P | YES+P | YES+P | YES+P |
| VC1541 [1] | YES | no | no | no |
This software has been abandoned. It is not developed anymore, therefore, you should not choose cables according to their compatibility with it. Instead, use another software for the same purpose and see the compatibility of the cables with that one.
This software uses its own cable and it does not support any of the X1541-series interfaces. It is included in the table only for the sake of completeness.
The serial cables are intentionally of simple design and do not aim at achieving the highest transfer speeds possible.
Transfer programs, that use the serial cables, should be able to transfer a single side of a 1541 disk in a few minutes, depending on the transfer mode (the disk turbo and the data transfer protocol) used.
Emulator and file server programs, that use the serial cables, cannot and, therefore, do not support disk turbos, only the standard Commodore IEC transfer speed. It may be possible, though, that the emulator software itself contains its own disk turbo (in a routine that invisibly autoloads and autostarts before the actual program being loaded) or it can detect GEOS running in the Commodore machine and can tell GEOS how to use the emulated drive at a higher speed. See the software documentation for such information. If you need a cable that lets software emulate Commodore drives at a very low level and support (some!) disk turbos, use the (more complicated) 1541EMU cable instead.
With an XP1541/XP1571 parallel cable added to the serial cable, you can not only raise the transfer speed but also make it possible to transfer the disk contents at a lower level: read more data more precisely off the disk. The only current example for the latter is nibtools, which is a nibbler software for 1541 drives that runs on a PC.
With a transfer software and a serial cable only, you may be able to transfer simple copy protections: intentional disk errors and intentionally damaged sector contents. However, for more sophisticated ones, you need an XP1541/XP1571 parallel cable and nibtools.
There is currently no file server and emulator software that would be able to emulate copy protections, with or without a parallel cable.
Not all software may support the cable of your choice. As you can see above, not all software support all cables (or cable combos). If you make your choice according to hardware compatibility but your favorite software does not support the chosen cable (or cable combo) then you may want to ask the author to incorporate support. However, if the software is not developed anymore or your request for support is rejected or ignored then you have to make a compromise between hardware and software compatibility. Also, your cable choice may be based on the fact that your goal can be achieved with a single software only.
The XM1541 multitask cable is the best compromise. On a modern PC, the best compromise for software and hardware compatibility is the XM1541 multitask cable because:
it is easy to build (and cheap to buy);
it works with most parallel ports (only very few strange desktop motherboards and certain laptops do not support it);
it is supported by most software currently being developed;
the software, that support it, run on a wide range of operating systems.
You can convert an XE1541 extended cable into an XM1541 multitask cable easily. If you already have an XE1541 extended cable, you can easily convert it into an XM1541 multitask cable, by rewiring it or with the compact XE/M1541 adaptor.
The XA1541 active cable has the best hardware compatibility. If hardware compatibility (including possible compatibility with future PC's) is your absolute priority, the XA1541 active cable is for you. Its advantage over the XM1541 multitask cable is that:
it works with all parallel ports (until now, only one – probably, misdesigned or buggy – motherboard is known to not support it);
it works with multiple Commodore devices attached to the same serial bus (while the XM1541 cable can't drive the serial bus strong enough in such cases).
Its disadvantage is that:
it is difficult to build (and expensive to buy).
It is similar to the XM1541 multitask cable in that:
it is supported by most software currently being developed;
the software, that support it, run on a wide range of operating systems.
Add the XP1541/XP1571 parallel cable for higher transfer speeds or for copying protected disks. If you want higher speeds or want to be able to transfer (some!) copy protected disks, add the XP1541/XP1571 parallel cable to your serial cable.
There are, of course, other solutions for transferring data from/to Commodore drives and machines or emulating Commodore drives on the PC but, as those use different cables, they are out of the scope of this page.
If you're not very good at soldering, you can buy all these cables in The X1541 Shop, for low prices.
If you decided that you need an XP1541/XP1571 parallel cable then you should not build it as it is: this cable is a concept rather than an actual cable. It is recommended that you build a Commodore parallel cable instead, which you can either plug into a Commodore machine – thus establishing an additional parallel connection between the Commodore drive and the Commodore machine – or into an XEP1541 adaptor or an XAP1541 adaptor – for a parallel connection between the Commodore drive and a PC.
The XEP1541 adaptor is a small circuit board that has a port for the usual Commodore serial cable and a card edge for the Commodore parallel cable. Plug the Commodore serial cable onto the adaptor, plug the adaptor itself into the PC parallel port and you get an XE1541 cable; if you need an XM1541 cable, use a twisted Commodore serial cable instead of the normal Commodore serial cable (the XMP1541 adaptor has not been implemented); when an XA1541 cable is needed, use the XAP1541 adaptor instead. If you also plug the Commodore parallel cable onto the adaptor, you get an additional XP1541/XP1571 parallel cable.
The following cables are similar, in design concept and/or purpose, to the X1541-series interfaces. They are not discussed further on this page as they are out of scope.
1541EMU cable. Serial cable
to connect a Commodore machine to a PC, the latter acting as a low level
1541 emulator. Its concept is similar to the X1541-series serial cables but
it concentrates on a better emulation of the Commodore serial bus.
Advantage: supports the emulation of fast loaders.
Disadvantage: more difficult to build.
Power-Loader cable. Additional parallel cable to connect a Commodore machine to a PC, the latter acting as a drive emulator or file server. Companion cable for the X1541-series serial cables. Its concept is similar to the XP1541/XP1571 parallel cables but it is used for Commodore machines rather than Commodore drives.
X1531 cable. Serial cable to connect a Commodore 1531 datasette to a PC. Its concept is similar to X1541-series serial cables but it is used for Commodore datasettes rather than Commodore machines/drives.
Easy1541 cable. Serial cable to connect a Commodore drive to an Amiga. Its concept is similar to the X1541-series serial cables but it is for Amigas rather than PC's.
Frodo IEC cable. Serial cable to connect a Commodore drive to an Amiga. Its concept is similar to the X1541-series serial cables but it is for Amigas rather than PC's.
Commodore serial cable.
Serial cable to connect Commodore peripherals (drives, printers) to
Commodore machines.
Note: When plugged into an X1541-series adaptor, this cable acts as
an X1541-series serial cable.
Commodore parallel cable.
Additional parallel cable to connect Commodore drives to Commodore machines.
Companion to the Commodore serial cable.
Note: When plugged into an X1541-series adaptor, this cable acts as
an X1541-series parallel cable.
Commodore cross cable.
Parallel cable to connect two Commodore machines together.
Note: When plugged into an X1541-series adaptor, this cable acts as
a Power-Loader cable.
The X1541-series cables are copyrighted by the following individuals:
The X1541 cable is © by Leopoldo Ghielmetti, 1992.
The XE1541 extended cable is © by Nicolas Welte and Wolfgang Moser, 1997.
The XM1541 multitask cable is © by Michael Klein and Nicolas Welte, 2000.
The XA1541 active cable is © by Michael Klein and Nicolas Welte, 2000.
The XH1541/XH1571 hybrid cables are © by Bigfoot, 1997.
The XP1541/XP1571 parallel cables are © by Joe Forster/STA, 1997.
If you produce and sell cables or adaptors that are compatible with these cables – except for the original X1541 cable –, you must give credits to the respective copyright owner or copyright owners. If your adaptors are built onto printed circuit boards then you must also make the complete layout available in a format and resolution that is suitable for high quality reproduction so that people may build the adaptors themselves, if they want.
This common license for the cables is an agreement among the cable authors. However, because the author of the original X1541 cable couldn't be contacted for an inquiry, this license does not apply to the original X1541 cable.
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