fdc8271.cdl File Reference

CDL implementation of 8271 FDC. More...

Detailed Description

CDL implementation of 8271 FDC.

Copyright

(C) 2016-2017, Gavin J Stark. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This is an implementaion of the Intel 8271 FDC - although that was a microcoded beast, and this is hard-coded state machines. Also, this maps 8271 commands to bbc_floppy op/responses, which can then be mapped to SRAM read/writes, rather than analog FM/MFM data.

Data Structures
struct	fdc8271::t_drive_outputs
struct	fdc8271::t_drive_timing
struct	fdc8271::t_drive_timing_state
struct	fdc8271::t_drive_operation
struct	fdc8271::t_drive_operation_state
struct	fdc8271::t_drive_execution_result
struct	fdc8271::t_drive_execution
struct	fdc8271::t_drive_execution_state
struct	fdc8271::t_set_outputs
struct	fdc8271::t_command
struct	fdc8271::t_command_state
struct	fdc8271::t_control_scan
struct	fdc8271::t_control_drive
struct	fdc8271::t_control
struct	fdc8271::t_command_register
struct	fdc8271::t_parameter_register
struct	fdc8271::t_result_register
struct	fdc8271::t_status_register

Namespaces
	fdc8271

Enumerations
enum	fdc8271::t_dos_fsm {   fdc8271::dos_fsm_idle,   fdc8271::dos_fsm_complete_okay,   fdc8271::dos_fsm_complete_track_0_not_found,   fdc8271::dos_fsm_seek_zero_start,   fdc8271::dos_fsm_seek_zero_step,   fdc8271::dos_fsm_seek_zero_wait_until_settled,   fdc8271::dos_fsm_seek_nonzero_check_bad_track_1,   fdc8271::dos_fsm_seek_nonzero_check_bad_track_2,   fdc8271::dos_fsm_seek_nonzero_calculate_steps,   fdc8271::dos_fsm_seek_nonzero_set_direction,   fdc8271::dos_fsm_seek_nonzero_step,   fdc8271::dos_fsm_seek_sector_id,   fdc8271::dos_fsm_seek_sector_id_check,   fdc8271::dos_fsm_load_head,   fdc8271::dos_fsm_read_id,   fdc8271::dos_fsm_read_id_copy_data,   fdc8271::dos_fsm_read_data,   fdc8271::dos_fsm_read_data_wait,   fdc8271::dos_fsm_read_data_present_data,   fdc8271::dos_fsm_present_data,   fdc8271::dos_fsm_find_index,   fdc8271::dos_fsm_find_index_wait }
enum	fdc8271::t_drive_execution_operation {   fdc8271::deo_none,   fdc8271::deo_find_index,   fdc8271::deo_seek_track,   fdc8271::deo_seek_sector_id,   fdc8271::deo_load_head,   fdc8271::deo_read_id,   fdc8271::deo_read_data }
enum	fdc8271::t_des_fsm {   fdc8271::des_fsm_idle,   fdc8271::des_fsm_find_index,   fdc8271::des_fsm_finding_index,   fdc8271::des_fsm_seek_load,   fdc8271::des_fsm_seek_load_wait_for_load,   fdc8271::des_fsm_seek,   fdc8271::des_fsm_seek_in_progress,   fdc8271::des_fsm_seek_sector_id,   fdc8271::des_fsm_seek_sector_id_in_progress,   fdc8271::des_fsm_read_id,   fdc8271::des_fsm_read_id_in_progress,   fdc8271::des_fsm_read_data,   fdc8271::des_fsm_read_data_in_progress }
enum	fdc8271::t_drive_execution_command {   fdc8271::dec_none,   fdc8271::dec_find_index,   fdc8271::dec_seek,   fdc8271::dec_seek_load,   fdc8271::dec_read_id,   fdc8271::dec_seek_sector,   fdc8271::dec_read_data }
enum	fdc8271::t_cs_fsm {   fdc8271::cs_fsm_idle,   fdc8271::cs_fsm_specify_0,   fdc8271::cs_fsm_specify_init_step_rate,   fdc8271::cs_fsm_specify_init_head_settling_time,   fdc8271::cs_fsm_specify_init_load_time,   fdc8271::cs_fsm_specify_load_bad_track_1,   fdc8271::cs_fsm_specify_load_bad_track_2,   fdc8271::cs_fsm_specify_load_current_track,   fdc8271::cs_fsm_write_special_reg,   fdc8271::cs_fsm_write_special_data,   fdc8271::cs_fsm_read_special_reg,   fdc8271::cs_fsm_seek_get_track,   fdc8271::cs_fsm_seek_start,   fdc8271::cs_fsm_seek_wait_for_result,   fdc8271::cs_fsm_read_write_multi_sector,   fdc8271::cs_fsm_read_write_multi_sector_get_sector,   fdc8271::cs_fsm_read_write_multi_sector_get_length,   fdc8271::cs_fsm_read_write_multi_sector_find_sector,   fdc8271::cs_fsm_read_write_multi_sector_seek_load,   fdc8271::cs_fsm_read_write_multi_sector_wait_for_find,   fdc8271::cs_fsm_read_write_multi_sector_read_data,   fdc8271::cs_fsm_read_write_multi_sector_reading_data,   fdc8271::cs_fsm_read_multi_id,   fdc8271::cs_fsm_read_multi_id_zero_param,   fdc8271::cs_fsm_read_multi_id_num_ids,   fdc8271::cs_fsm_read_multi_id_seek_load,   fdc8271::cs_fsm_read_multi_id_find_index,   fdc8271::cs_fsm_read_multi_id_start,   fdc8271::cs_fsm_read_multi_id_wait_for_result,   fdc8271::cs_fsm_read_write_sector,   fdc8271::cs_fsm_read_write_sector_get_sector,   fdc8271::cs_fsm_read_write_sector_find_sector,   fdc8271::cs_fsm_read_write_sector_seek_load,   fdc8271::cs_fsm_read_write_sector_wait_for_find,   fdc8271::cs_fsm_read_write_sector_read_data,   fdc8271::cs_fsm_read_write_sector_reading_data,   fdc8271::cs_fsm_command_format_track,   fdc8271::cs_fsm_result_none,   fdc8271::cs_fsm_result_ready,   fdc8271::cs_fsm_result_capture,   fdc8271::cs_fsm_command_status_0,   fdc8271::cs_fsm_drive_status }
enum	fdc8271::t_read_action {   fdc8271::read_action_none,   fdc8271::read_action_status,   fdc8271::read_action_result,   fdc8271::read_action_data }
enum	fdc8271::t_write_action {   fdc8271::write_action_none,   fdc8271::write_action_command,   fdc8271::write_action_parameter,   fdc8271::write_action_data,   fdc8271::write_action_reset }

Variables
constant integer	fdc8271::timer_data_counter_value =128
constant integer	fdc8271::timer_10us_counter_value =2
constant integer	fdc8271::timer_1ms_counter_value =8