8-Bit Software Online Conversion

Documentation for: Mode conversion and disassembler By M.Bobrowski. Text also by M.Bobrowski.     Mode0/4 Mode1/4 Mode4/0 Mode4/1 These programs allow to convert screen pictures from one graphic mode to another, eg. those created by AMX Stop Press, AMX SuperArt, Fleet Street Editor or Wapping Editor. As a matter of fact there is an excellent screen mode converting utility on the AMX Stop Press disc which could do the job. However, not all our members have the AMX Stop Press package, and what is more important, this utility allows any conversion only in one direction, ie. from a higher mode to a lower mode, eg. from Mode 5 to Mode 1 or from Mode 2 to Mode 0. I have written two programs which can convert a Mode 0 or Mode 1 picture into Mode 4. Of course, after conversion from a high-resolution Mode 0 to a low-resolution Mode 4 some details are lost and resulting Mode 4 pictures may need corrections, but such corrections can be easily done with any 'Pixel Editor' program. There is another problem with the conversion from Mode 1 to Mode 4. When running the program 'Mode1/4' a question:- 'Convert all foreground colours to white (Y/N) ? ' will appear on the screen. Depending on the answer given a different result is obtained. With the 'Y' answer, all red and yellow pixels visible on Mode 1 picture are converted into white pixels, whereas with the 'N' answer, red pixels are changed into black, and yellow pixels are converted into white onces. Of course, in both cases all white pixels will remain white as well as all black pixels will remain black. You may examine the problem using the 'Henry1' Mode 1 screen file which is included on the disc.   There are two versions of a machine code program, called 'UDA19' and 'UDA70' for 'Universal DisAssembler'. The first version has been assembled from the location &1900 on, and the second version from the location &7000 on. (Thus, the second version can be used only in Mode 7 or in any of the shadow modes.) The main feature of both versions is that the output can be directed to a screen, to a printer or to a disc in the form of pure ASCII file. Such a file can be then edited by any word processor or by the Master Edit to restitute the otherwise unknown source code. Another feature of the 'UDA' utility is that it allows to disassemble fragments of various ROMs installed in your machine as well as fragments of the MOS.