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Implemented register 3F3, see comments

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instinc 2002-04-11 02:21:59 +00:00
parent 1e7cc13b04
commit a6320ce597
1 changed files with 19 additions and 6 deletions
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25
bochs/iodev/floppy.cc
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@ -1,5 +1,5 @@
///////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////
// $Id: floppy.cc,v 1.37 2002-04-11 01:07:34 instinc Exp $ // $Id: floppy.cc,v 1.38 2002-04-11 02:21:59 instinc Exp $
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2002 MandrakeSoft S.A. // Copyright (C) 2002 MandrakeSoft S.A.
@ -87,7 +87,7 @@ bx_floppy_ctrl_c::~bx_floppy_ctrl_c(void)
void void
bx_floppy_ctrl_c::init(bx_devices_c *d, bx_cmos_c *cmos) bx_floppy_ctrl_c::init(bx_devices_c *d, bx_cmos_c *cmos)
{ {
BX_DEBUG(("Init $Id: floppy.cc,v 1.37 2002-04-11 01:07:34 instinc Exp $")); BX_DEBUG(("Init $Id: floppy.cc,v 1.38 2002-04-11 02:21:59 instinc Exp $"));
BX_FD_THIS devices = d; BX_FD_THIS devices = d;
BX_FD_THIS devices->register_irq(6, "Floppy Drive"); BX_FD_THIS devices->register_irq(6, "Floppy Drive");
@ -325,6 +325,20 @@ bx_floppy_ctrl_c::read(Bit32u address, unsigned io_len)
break; break;
#endif // #if BX_DMA_FLOPPY_IO #endif // #if BX_DMA_FLOPPY_IO
case 0x3F3: // Tape Drive Register
// see http://www.smsc.com/main/datasheets/37c93x.pdf page 18 for more details
switch( BX_FD_THIS s.DOR & 0x03 )
{
case 0x00:
if( (BX_FD_THIS s.DOR & 0x10) == 0) break;
return(2);
case 0x01:
if( (BX_FD_THIS s.DOR & 0x20) == 0) break;
return(1);
}
return(3);
case 0x3F6: // Reserved for future floppy controllers case 0x3F6: // Reserved for future floppy controllers
// This address shared with the hard drive controller // This address shared with the hard drive controller
value = BX_FD_THIS devices->hard_drive->read_handler(BX_FD_THIS devices->hard_drive, address, io_len); value = BX_FD_THIS devices->hard_drive->read_handler(BX_FD_THIS devices->hard_drive, address, io_len);
@ -417,9 +431,8 @@ bx_floppy_ctrl_c::write(Bit32u address, Bit32u value, unsigned io_len)
(unsigned) drive_select)); (unsigned) drive_select));
if (drive_select>1) { if (drive_select>1) {
BX_DEBUG(("WARNING: applying mod(2) on drive_select")); BX_DEBUG(("WARNING: applying mod(2) on drive_select"));
drive_select = drive_select & 0x01; drive_select &= 0x01;
BX_DEBUG(("new drive_select=%02x", BX_DEBUG(("new drive_select=%d", (unsigned) drive_select));
(unsigned) drive_select));
} }
break; break;