TPDD client:Disk Power: Difference between revisions

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=Disk Power and Disk Power II by Hugu Ferreyra / Ultrasoft Innovations=
=Disk Power and Disk Power II by Hugu Ferreyra / Ultrasoft Innovations=


Disk Power was available for multiple machines. Versions for at least TRS-80 Model 100/102, 200 and Kyotronic KC-85 are known. Versions for NEC PC-8201a and Olivetti M10 are likely but unknown.
Disk Power was available for at least the Tandy Model 100/102 & 200, and Kyotronic KC-85 machines.<br>
Versions for NEC PC-8201a and Olivetti M10 are likely but unknown.


The only documentation available about Disk Power is there are many [[TPDD client:Disk Power:M100SIG_references|references]] throughout the [https://github.com/LivingM100SIG/Living_M100SIG M100SIG Archive].
The only documentation available about Disk Power is there are many [[TPDD client:Disk Power:M100SIG_references|references]] throughout the [https://github.com/LivingM100SIG/Living_M100SIG M100SIG Archive].


Few/no copies are available today as it was designed to be impossible for the user to copy.
Few copies are available today as it was designed to be impossible for the user to copy, and so there are now no copies.


Both the distribution disk and the cassette were required to install the software. There is no way to prevent copying a cassette, but the distribution disk was impossible to copy using any of the TPDD software available at the time. This includes the full-disk backup utility on the original Tandy TPDD utility disk, and DiskPower itself provides no backup utility.
Both the original distribution disk and the cassette were required to install the software, and there was no way to copy the disk using any software available at the time. There is no technical reason to require both a cassette and a disk to install a single program. The scheme merely functioned as a means of copy protection because a cassette could be copied but the disk was specially crafted to prevent copying.


So, to install, or re-install the software after a crash or full power loss or a cold reset, the user needed both the cassette and the actual original distribution disk.
Today there is a [https://github.com/bkw777/pdd.sh tpdd utility] that can read & write TPDD1 and TPDD2 disks more completely than what was previously available. If any physical copies of Disk Power do turn up now, it will be possible to archive and redistribute them. This has been done for the KC-85 version.
 
Today there is a [https://github.com/bkw777/pdd.sh tpdd utility] that can read & write TPDD1 and TPDD2 disks more completely than what was previously available. If any physical copies of Disk Power turn up, it will now be possible to archive and redistribute it. This has been done for the KC-85 version.


[[TPDD client:Disk Power:KC-85]]
[[TPDD client:Disk Power:KC-85]]

Revision as of 04:48, 21 April 2022

Disk Power and Disk Power II by Hugu Ferreyra / Ultrasoft Innovations

Disk Power was available for at least the Tandy Model 100/102 & 200, and Kyotronic KC-85 machines.
Versions for NEC PC-8201a and Olivetti M10 are likely but unknown.

The only documentation available about Disk Power is there are many references throughout the M100SIG Archive.

Few copies are available today as it was designed to be impossible for the user to copy, and so there are now no copies.

Both the original distribution disk and the cassette were required to install the software, and there was no way to copy the disk using any software available at the time. There is no technical reason to require both a cassette and a disk to install a single program. The scheme merely functioned as a means of copy protection because a cassette could be copied but the disk was specially crafted to prevent copying.

Today there is a tpdd utility that can read & write TPDD1 and TPDD2 disks more completely than what was previously available. If any physical copies of Disk Power do turn up now, it will be possible to archive and redistribute them. This has been done for the KC-85 version.

TPDD client:Disk Power:KC-85