i82077

Description

The 82077 device implements the functionality of the Intel® 82077 floppy controller together with up to four disk drives. There can usually be two floppy controllers in a PC system, the first and the secondary. While a controller can have four drives connected to it, most BIOSes only support two drives.

Interfaces Implemented

conf_object, log_object, io_memory

Notifiers

cell-change: Notifier that is triggered after the object's cell was changed.
object-delete: Notifier that is triggered just before Simics object is deleted.
queue-change: Notifier that is triggered after the object's clock was changed. New clock can be obtained with the SIM_object_clock function.

Commands for this class

eject-floppy – eject floppy
info – print information about the object
insert-floppy – insert floppy in drive
status – print status of the object

Attributes

irq_dev: Optional attribute; read/write access; type: o|n
Interrupt device, implementing the simple_interrupt interface.
dma_dev: Required attribute; read/write access; type: o
DMA device, implementing the legacy_dma interface.
dma_channel: Required attribute; read/write access; type: i
DMA channel.
irq_level: Required attribute; read/write access; type: i
Interrupt level.
state: Optional attribute; read/write access; type: i
Floppy command state. Idle=0, Command=1, Execute=2, Result=3.
interrupt_pin: Optional attribute; read/write access; type: i
Interrupt request status.
enabled: Optional attribute; read/write access; type: i
Controller enable flag.
dma_enabled: Optional attribute; read/write access; type: i
DMA enable flag.
drive_select: Optional attribute; read/write access; type: i
Currently selected drive.
receive_ready: Optional attribute; read/write access; type: i
Controller is ready to receive data (main status bit 7).
direction_cpu: Optional attribute; read/write access; type: i
Data transfer direction (main status bit 6).
command_busy: Optional attribute; read/write access; type: i
Command busy (main status bit 4).
fifo_enabled: Optional attribute; read/write access; type: i
FIFO enable flag.
fifo_threshold: Optional attribute; read/write access; type: i
FIFO threshold.
poll_enabled: Optional attribute; read/write access; type: i
Polling mode enable flag.
poll_change: Optional attribute; read/write access; type: i
Polling change detected.
precomp: Optional attribute; read/write access; type: i
Precompensation.
cmd_id: Optional attribute; read/write access; type: i
Currently executing command.
cmd_len: Optional attribute; read/write access; type: i
Actual length of current command.
cur_cmd_len: Optional attribute; read/write access; type: i
Number of command bytes received.
res_len: Optional attribute; read/write access; type: i
Number of result bytes.
cur_res_pos: Optional attribute; read/write access; type: i
Current result read position.
implied_seek: Optional attribute; read/write access; type: i
Implied seek enable flag.
step_rate: Optional attribute; read/write access; type: i
Step rate interval.
head_load: Optional attribute; read/write access; type: i
Head load time.
head_unload: Optional attribute; read/write access; type: i
Head unload time.
st0: Optional attribute; read/write access; type: i
Status register 0.
st1: Optional attribute; read/write access; type: i
Status register 1.
st2: Optional attribute; read/write access; type: i
Status register 2.
drives: Optional attribute; read/write access; type: [o]|[oo]|[ooo]|[oooo]|n
((drive)*). List of up to four floppy drives.
cmd: Optional attribute; read/write access; type: [i{17}]
(b0, ..., b16). Current command.
res: Optional attribute; read/write access; type: [i{15}]
(b0, ..., b14). Result bytes.

Provided By

82077