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- when you write the device/head register, if the device doesn't exist or

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something, we need to set the error in the status register.
This commit is contained in:
Bryce Denney 2001-10-06 08:59:01 +00:00
parent 7986ea67a7
commit ec6a8b3ef5
1 changed files with 15 additions and 4 deletions
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19
bochs/iodev/harddrv.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: harddrv.cc,v 1.37 2001-10-03 13:10:38 bdenney Exp $
// $Id: harddrv.cc,v 1.38 2001-10-06 08:59:01 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -104,7 +104,7 @@ bx_hard_drive_c::~bx_hard_drive_c(void)
bx_hard_drive_c::init(bx_devices_c *d, bx_cmos_c *cmos)
{
BX_HD_THIS devices = d;
BX_DEBUG(("Init $Id: harddrv.cc,v 1.37 2001-10-03 13:10:38 bdenney Exp $"));
BX_DEBUG(("Init $Id: harddrv.cc,v 1.38 2001-10-06 08:59:01 bdenney Exp $"));
/* HARD DRIVE 0 */
@ -1374,14 +1374,25 @@ BX_DEBUG(("IO write to %04x = %02x", (unsigned) address, (unsigned) value));
// b5 1
// b4: DRV
// b3..0 HD3..HD0
{
if ( (value & 0xa0) != 0xa0 ) // 1x1xxxxx
BX_INFO(("IO write 1f6 (%02x): not 1x1xxxxxb", (unsigned) value));
BX_HD_THIS drive_select = (value >> 4) & 0x01;
Bit32u drvsel = BX_HD_THIS drive_select = (value >> 4) & 0x01;
WRITE_HEAD_NO(value & 0xf);
if (BX_SELECTED_CONTROLLER.lba_mode == 0 && ((value >> 6) & 1) == 1)
BX_INFO(("enabling LBA mode"));
BX_INFO(("enabling LBA mode"));
WRITE_LBA_MODE((value >> 6) & 1);
if (!drvsel && !bx_options.diskc.Opresent->get ()) {
BX_ERROR (("device set to 0 which does not exist"));
BX_SELECTED_CONTROLLER.error_register = 0x04; // aborted
BX_SELECTED_CONTROLLER.status.err = 1;
} else if (drvsel && !bx_options.diskd.Opresent->get ()) {
BX_ERROR (("device set to 1 which does not exist"));
BX_SELECTED_CONTROLLER.error_register = 0x04; // aborted
BX_SELECTED_CONTROLLER.status.err = 1;
}
break;
}
case 0x1f7: // hard disk command
// (mch) Writes to the command register with drive_select != 0