UINT8 a2bus_floppy_device::read_c0nx(address_space &space, UINT8 offset)
{
return applefdc_r(m_fdc, offset);
}
static READ8_HANDLER( apple3_c0xx_r )
{
UINT8 result = 0xFF;
switch(offset)
{
case 0x00: case 0x01: case 0x02: case 0x03:
case 0x04: case 0x05: case 0x06: case 0x07:
result = AY3600_keydata_strobe_r();
break;
case 0x08: case 0x09: case 0x0A: case 0x0B:
case 0x0C: case 0x0D: case 0x0E: case 0x0F:
/* modifier keys */
result = 0x7d;
break;
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1A: case 0x1B:
case 0x1C: case 0x1D: case 0x1E: case 0x1F:
AY3600_anykey_clearstrobe_r();
break;
case 0x50: case 0x51: case 0x52: case 0x53:
case 0x54: case 0x55: case 0x56: case 0x57:
/* graphics softswitches */
if (offset & 1)
a3 |= 1 << ((offset - 0x50) / 2);
else
a3 &= ~(1 << ((offset - 0x50) / 2));
break;
case 0x60: case 0x61: case 0x62: case 0x63:
case 0x64: case 0x65: case 0x66: case 0x67:
case 0x68: case 0x69: case 0x6A: case 0x6B:
case 0x6C: case 0x6D: case 0x6E: case 0x6F:
/* unsure what these are */
result = 0x00;
break;
case 0xC0: case 0xC1: case 0xC2: case 0xC3:
case 0xC4: case 0xC5: case 0xC6: case 0xC7:
case 0xC8: case 0xC9: case 0xCA: case 0xCB:
case 0xCC: case 0xCD: case 0xCE: case 0xCF:
/* profile */
result = apple3_profile_r(offset);
break;
case 0xD0: case 0xD1: case 0xD2: case 0xD3:
case 0xD4: case 0xD5: case 0xD6: case 0xD7:
/* external drive stuff */
if (offset & 1)
a3 |= VAR_EXTA0 << ((offset - 0xD0) / 2);
else
a3 &= ~(VAR_EXTA0 << ((offset - 0xD0) / 2));
apple3_update_drives();
result = 0x00;
break;
case 0xDB:
apple3_write_charmem();
break;
case 0xE0: case 0xE1: case 0xE2: case 0xE3:
case 0xE4: case 0xE5: case 0xE6: case 0xE7:
case 0xE8: case 0xE9: case 0xEA: case 0xEB:
case 0xEC: case 0xED: case 0xEE: case 0xEF:
result = applefdc_r(offset);
break;
case 0xF0:
case 0xF1:
case 0xF2:
case 0xF3:
result = acia_6551_r(offset & 0x03);
break;
}
return result;
}
