c64scene.pl

Some games do not run on the DTV hardware, or have some flaws that should be fixed before the games behave correctly on the DTV. Normally this will be due to the hardware (ASIC) implementation in the DTV that in some instances behaves slightly different that the original C64 hardware, although it is impressive how close it actually gets.

VICII: In particular some games and especially a lot of demos for the C64 use special raster routines and fancy programming of the VIC chip, which may result in graphical glitches on the DTV. This kind of glitch can be extremely difficult or even impossible to fix, so start out by finding a game that does not pose too many problems in this respect.

SID: Some similar issues exist for the SID (sound) implementation on the DTV. An important point is that the DTV does not implement SID filters, and so the sound may sound considerably different than what one might be used to from the C64. Fortunately a large percentage of games do not use SID filters due to the fact that production differences on the original C64 SIDs meant that the sound could appear quite differently on different C64s when using filters. Again, the easiest is to pick a game that works on the DTV hardware.

Keyboard input: In most cases the primary issue is games that require keyboard input, either in-game, when starting the game (such as select 1 or 2 players or select level), or for skipping the highscore entry. Although this does not per se mean that the games cannot be played on the DTV, it will require that a keyboard is hooked up to the DTV in order for it to work. It is therefore desirable to patch any part of the game that requires the keyboard to work with the joystick. You can also use the five extra buttons found on the DTV (see Joystick port for details). If this means that some selections are not possible (due to limited keys), so be it, but it would be preferable to be able to avoid the keyboard. A lot of games seem to require selecting the number of players before starting, normally by pressing either 1/2 or F1/F3. In this case it is desirable that pressing the firebutton on joystick2 (i.e. the left button on the DTV) results in a one-player game being started.

Similarly, a lot of times a C64 game has some loader/decruncher/cracker screen that requires the use of the keyboard (normally by hitting the space bar) to continue. Although it would certainly be possible to patch this to react on the left button of the joystick, and this is an acceptable solution, it is often just as easy to remove the screen altogether.

Floppy loading: For games that consist of more than one file (known as multi-part games), there may be a need to fix the loading routine in order for the game to work on the DTV. Normally the game (if it is a floppy-game) is loaded from device 8. The flash in the DTV can be accessed using kernal routines (and LOAD) using device 1. It implements random access semantics like a floppy.

snerg pisze:Ok dzieki za obicie pyska.

kisiel pisze:za kilka tysięcy złotych można to zrobić jako prototyp, przy takich życzeniach to jest wykonalne od zera.

11111olo pisze:Skąd wiesz że nie jest? bo mu się nie podobasz?

kisiel pisze:Jak nadal się nie wyleczyłeś daj temat do jeri, ona jest w stanie zrobic to dość szybko.

KB777 pisze:

kisiel pisze:Jak nadal się nie wyleczyłeś daj temat do jeri, ona jest w stanie zrobic to dość szybko.

O ile nie zgubi źródeł w międzyczasie. Tak jak się jej przytrafiło np. z DTV