Original text below.
Attached is a patch that changes how the emulated floppy controller replies to Sense Interrupt Status commands immediately after a controller reset. The specs state that after a Reset the 82078 goes into polling mode which needs four Sense Interrupt Status commands to be issued afterwards to clear the status of each drive. Currently we always respond to Sense Interrupt Status with a SEEK END instead of POLLING. This causes a problem with the SCO Openserver installer which is expects a POLLING state after reset. This patch returns a POLLING status for four Sense Interrupt Status requests immediately after a controller reset. This approach mirrors the way Bochs handles this situation. With the attached patch applied Openserver gets further when trying to load storage drivers from the floppy disk (blocked by another issue, patch on its way). I have successfully tested the floppy drive on the following OSs after applying this patch: Windows 98, Windows XP SP2, Linux x86 (SysRescCD 1.1.3 and Ubuntu 8.10).
Justin
Changelog:
Properly handle Sense Interrupt Status after FDC Reset
Signed-off-by: Justin Chevrier <theburner1@yahoo.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6416 c046a42c-6fe2-441c-8c8c-71466251a162
Change from v1:
Avoid changing the existing coding style in certain files.
Signed-off-by: Stuart Brady <stuart.brady@gmail.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6120 c046a42c-6fe2-441c-8c8c-71466251a162
In floppy controller, transfer data len is not correctly calculated.
We should read up to the last sector specified by the caller, and not up to
the last sector of the floppy.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4294 c046a42c-6fe2-441c-8c8c-71466251a162
In floppy controller, programming PIO writes which are more than one sector
long leads to a buffer overflow of the fdtrl->fifo[] array.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4293 c046a42c-6fe2-441c-8c8c-71466251a162
- Replaces bootsel field by the whole tdr register. It may be easier if we want to later add support for tapes.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4288 c046a42c-6fe2-441c-8c8c-71466251a162
- Removes useless fields in fdrive_t structure.
- Adds a message when bdrv_read/bdrv_write calls fail.
- Rename int_status to status0.
- Replace some constants by value names.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4287 c046a42c-6fe2-441c-8c8c-71466251a162
- Stores controller state in MSR register instead of internal state field. This simplifies the fdctrl_read_main_status() function, which may be called in some tight loops.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4286 c046a42c-6fe2-441c-8c8c-71466251a162
- Better handling of DOR register. DOR register drives external motors, but it not limited to existing drives.
- Use FD_DOR_nRESET flag instead of internal FD_CTRL_RESET flag.
- Support writing to DOR register even in reset mode (as said in specification)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4285 c046a42c-6fe2-441c-8c8c-71466251a162
- Handles correctly FD_MSR_NONDMA/FD_DOR_NONDMA flags, and uses them when possible. Fixes a problem with SPECIFY command.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4284 c046a42c-6fe2-441c-8c8c-71466251a162
- Fixes status A and status B registers. It removes one Sun4m mutation. Also removes the internal FD_CTRL_INTR flag.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4283 c046a42c-6fe2-441c-8c8c-71466251a162
- Extract seeking to next sector handling in a function. Add a sector seek in PIO read and write modes
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4282 c046a42c-6fe2-441c-8c8c-71466251a162
- Adds a command lookup table, as suggested by Fabrice at http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00143.html
- This also moves initialization functions at the bottom of the file to prevent multiple forward declarations.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4281 c046a42c-6fe2-441c-8c8c-71466251a162
nb_sectors instead of len in bytes but the fdc driver has never been fixed.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3532 c046a42c-6fe2-441c-8c8c-71466251a162
