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MZ700: cleaned up the keyboard code, nw

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This commit is contained in:
Angelo Salese 2012-09-05 14:00:09 +00:00
parent 90a119f9bc
commit 6fbb9a73e0
1 changed files with 7 additions and 13 deletions
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20
src/mess/machine/mz700.c
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@ -436,23 +436,17 @@ static WRITE_LINE_DEVICE_HANDLER( pit_irq_2 )
static READ8_DEVICE_HANDLER( pio_port_b_r ) static READ8_DEVICE_HANDLER( pio_port_b_r )
{ {
int key_line = dynamic_cast<ttl74145_device *>(device)->read(); int key_line = dynamic_cast<ttl74145_device *>(device)->read();
const char *const keynames[10] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7", "ROW8", "ROW9" };
int i;
UINT8 res = 0;
switch (key_line) for(i=0;i<10;i++)
{ {
case 1 << 0: return device->machine().root_device().ioport("ROW0")->read(); if(key_line & (1 << i))
case 1 << 1: return device->machine().root_device().ioport("ROW1")->read(); res |= device->machine().root_device().ioport(keynames[i])->read();
case 1 << 2: return device->machine().root_device().ioport("ROW2")->read();
case 1 << 3: return device->machine().root_device().ioport("ROW3")->read();
case 1 << 4: return device->machine().root_device().ioport("ROW4")->read();
case 1 << 5: return device->machine().root_device().ioport("ROW5")->read();
case 1 << 6: return device->machine().root_device().ioport("ROW6")->read();
case 1 << 7: return device->machine().root_device().ioport("ROW7")->read();
case 1 << 8: return device->machine().root_device().ioport("ROW8")->read();
case 1 << 9: return device->machine().root_device().ioport("ROW9")->read();
} }
/* should never reach this */ return res;
return 0xff;
} }
/* /*