Author
| row 8 of keyboard
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flyguille
msx master
Posts: 1225 |  Posted: August 09 2008, 22:33 |
I wrote a general description of the issue involved on programming a emulation of msx keyb, because I don't understand ¿what is the issue?
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wouter_
msx novice
Posts: 20 | Posted: August 10 2008, 10:12 |
@flok: I checked the source code of your emulator. It seems you modify the keyboard matrix in the read_keyboard() function (when port #A9 is read). This is wrong, reading port #A9 only queries the current status, it doesn't change the matrix in any way. In your check_keyboard() function you should also listen to SDL_KEYUP events, only those events should clear keys from the keyboard matrix.
Feel free to join #openmsx on irc.freenode.net, to discuss this in more detail (or other emulator related topics).
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AuroraMSX
msx master
Posts: 1262 | Posted: August 10 2008, 11:12 |
Quote:
| Keep in mind that keyboard is scanned every INT by BIOS
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Actually, the BIOS only scans the keyboard on every 3rd int. |
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flok
msx novice
Posts: 25 | Posted: August 12 2008, 22:46 |
bug fixed! it was acutally the button of the joystick being constantly pressed due to wrong joystick emulation
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