On Wed, Nov 22, 2000 at 07:56:58PM +0100, Alex Wulms wrote:
> ]   Everything I know is that this bit was used by MegaSCSI in some
> ] some apps to "blink" the Kana Led (according to the program manuals).
> So the answer is that the bit is used for the KANA led, to make it burn or 
> not burn.

Please READ. My original message (the one that started this thread) quoted Portar.txt:

Extract from Portar.txt:                                   

14= I/O port A (Joystick and cassette)                         
        bit   Expl.                                        
        0 = Joystick UP                 (0=Moved, 1=Not moved)
        1 = Joystick DOWN               (0=Moved, 1=Not moved)
        2 = Joystick LEFT               (0=Moved, 1=Not moved)
        3 = Joystick RIGHT              (0=Moved, 1=Not moved)
        4 = Joystick trigger A
        5 = Joystick trigger B
        6 = Keyboard mode               (On japanese machines only)
        7 = Cassette input

15= I/O port B (Joystick select)
        bit   Expl.
        0 =   1         (Used as handshaking output if touchpad)
        1 =   1         (Used as handshaking output if touchpad)
        2 =   1         (Used as handshaking output if touchpad)
        3 =   1         (Used as handshaking output if touchpad)
        4 =   Pulse 1   (Positive pulse starting a monostable timer)
        5 =   Pulse 2   (Positive pulse starting a monostable timer)
        6 =   Joystick select           (0=Connector 1, 1=Connector 2)
        7 =   Kana LED (Keyboard mode indicator. On japanese machines only)

So bit 7 of port 15 is the KANA led. I've said this over and over again.



Sean


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