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i82077

Provided by

82077

Class Hierarchy

conf-object → log-object → i82077

Interfaces Implemented

log_object, event_poster, io_memory

Description

The 82077 device implements the functionality of the 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.

Attributes

Attributes inherited from class conf-object

attributes, classname, component, iface, name, object_id, queue

Attributes inherited from class log-object

access_count, log_buffer, log_buffer_last, log_buffer_size, log_group_mask, log_groups, log_level, log_type_mask

Attribute List

cmd

Optional attribute; read/write access; type: [i{17}].

(b0, ..., b16). Current command.

cmd_id

Optional attribute; read/write access; type: Integer.

Currently executing command.

cmd_len

Optional attribute; read/write access; type: Integer.

Actual length of current command.

command_busy

Optional attribute; read/write access; type: Integer.

Command busy (main status bit 4).

cur_cmd_len

Optional attribute; read/write access; type: Integer.

Number of command bytes received.

cur_res_pos

Optional attribute; read/write access; type: Integer.

Current result read position.

direction_cpu

Optional attribute; read/write access; type: Integer.

Data transfer direction (main status bit 6).

dma_channel

Required attribute; read/write access; type: Integer.

DMA channel.

dma_dev

Required attribute; read/write access; type: Object.

DMA device, implementing the common-dma interface.

dma_enabled

Optional attribute; read/write access; type: Integer.

DMA enable flag.

drive_select

Optional attribute; read/write access; type: Integer.

Currently selected drive.

drives

Optional attribute; read/write access; type: [o]|[oo]|[ooo]|[oooo]|n.

((drive)*). List of up to four floppy drives.

enabled

Optional attribute; read/write access; type: Integer.

Controller enable flag.

fifo_enabled

Optional attribute; read/write access; type: Integer.

FIFO enable flag.

fifo_threshold

Optional attribute; read/write access; type: Integer.

FIFO threshold.

head_load

Optional attribute; read/write access; type: Integer.

Head load time.

head_unload

Optional attribute; read/write access; type: Integer.

Head unload time.

implied_seek

Optional attribute; read/write access; type: Integer.

Implied seek enable flag.

interrupt_pin

Optional attribute; read/write access; type: Integer.

Interrupt request status.

irq_dev

Optional attribute; read/write access; type: Object or Nil.

Interrupt device, implementing the simple-interrupt interface.

irq_level

Required attribute; read/write access; type: Integer.

Interrupt level.

poll_change

Optional attribute; read/write access; type: Integer.

Polling change detected.

poll_enabled

Optional attribute; read/write access; type: Integer.

Polling mode enable flag.

precomp

Optional attribute; read/write access; type: Integer.

Precompensation.

receive_ready

Optional attribute; read/write access; type: Integer.

Controller is ready to receive data (main status bit 7).

res

Optional attribute; read/write access; type: [i{15}].

(b0, ..., b14). Result bytes.

res_len

Optional attribute; read/write access; type: Integer.

Number of result bytes.

st0

Optional attribute; read/write access; type: Integer.

Status register 0.

st1

Optional attribute; read/write access; type: Integer.

Status register 1.

st2

Optional attribute; read/write access; type: Integer.

Status register 2.

state

Optional attribute; read/write access; type: Integer.

Floppy command state. Idle=0, Command=1, Execute=2, Result=3.

step_rate

Optional attribute; read/write access; type: Integer.

Step rate interval.

Command List

Commands defined by interface log_object

log, log-group, log-level, log-size, log-type

Commands

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

Command Descriptions

<i82077>.eject-floppy

Synopsis

<i82077>.eject-floppy "drive-letter"

Description

Eject the media from the disk drive specified by drive-letter.

<i82077>.info

Synopsis

<i82077>.info

Description

Print detailed information about the configuration of the device.

<i82077>.insert-floppy

Synopsis

<i82077>.insert-floppy "drive-letter" floppy-image [-rw] ["size"]

Description

Insert the file floppy-image as a floppy in the disk drive specified by drive-letter. For floppies with a different size than 1.44 MB, the size must be specified explicitly.

The -rw flag uses floppy-image in read-write mode, meaning that no save or save-diff-file command to the associated image object need to be used in order to save data written by the target software.

<i82077>.status

Synopsis

<i82077>.status

Description

Print detailed information about the current status of the device.

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