The later Professional-DOS Release variant from VTS Data

Since October 1987 in germany Professional-DOS was mainly sold by VTS Data, instead of Mikrotronic. Because the floppy expansion board got some minor changes (e.g. additional Jumpers), this sections refers to the »VTS Release« variant. Currently detailed informations about the VTS variant are not known and so it is assumed, that there are no big differencies to the hardware shown in the Release section.

The table below contains two pictures of the original packaging of such a Professional-DOS Release sold by VTS Data. Additionally the contributor sent the contents of the tool disk of his speeder. This disk does not only contain the copy programs as the other Professional-DOS tool disks, but an interactive demonstration for the C64 and C128 (PAL and NTSC versions), which shows how to insert the speeder into the different floppy drives and the main computer (the language of this demo is german). It also refers to a Jumper JP3, that has to be closed, when inserting Professional-DOS into a C1541C disk drive.

The tool disk is missing the drive kernal ROM as with the tool disks of other Professional-DOS versions. It does only contain the kernal ROM for a C64 computer.

The packaging of the Professional-DOS Release from VTS	Web picture, 150 dpi	Download, 600 dpi
Packaging, front side	600x700, 73 kB	2400x2800, 841 kB
Packaging, back side	600x700, 171 kB	2400x2800, 683 kB
ROM set and tools	Headerless binary format (PC based)	Commodore format (with load address)
Professional-DOS Release from VTS Data utility and demonstration disk	n.a.	VTS tool disk (83KB)

A Complete Professional-DOS Release set

Recently (December 2002) there was an auction on german [ssi error]eBay, were most probably another VTS Data Version was sold. The pictures show a whole box full with different EPROMs, the drive board, an expansion port interface cartridge, a big ROM switch and cables. It also contains the manual, the tool disk and an assembly manual. The description from the selling user also stated, that this system can be used either with a C64, C128 or C128D and the floppy disk drives 1541, 1541C or 1571 and also the 1571 built into a C128D. All the different EPROMs shown are an indication for the truthfulness of this message.

Packaging and contents of a Professional-DOS Release set sold at eBay	Web picture, 50 dpi
Professional-DOS set, package contents	425x275, 25 kB
Packaging, front side	200x275, 9 kB
Packaging, back side	200x275, 11 kB