crtc6845.cdl File Reference

CDL implementation of 6845 CRTC. More...

Detailed Description

CDL implementation of 6845 CRTC.

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 Motorola 6845 CRTC, which was used in the BBC microcomputer for sync and video memory address generation.

Data Structures
struct	crtc6845::t_horizontal_combs
struct	crtc6845::t_horizontal_state
struct	crtc6845::t_vertical_combs
struct	crtc6845::t_vertical_state
struct	crtc6845::t_address_state
struct	crtc6845::t_cursor_decode
struct	crtc6845::t_cursor_control
struct	crtc6845::t_control

Namespaces
	crtc6845

Enumerations
enum	crtc6845::t_cursor_mode {   crtc6845::cursor_mode_steady = 2b00,   crtc6845::cursor_mode_invisible = 2b01,   crtc6845::cursor_mode_flash_vsync_16 = 2b10,   crtc6845::cursor_mode_flash_vsync_32 = 2b11 }
enum	crtc6845::t_interlace_mode {   crtc6845::interlace_mode_normal =2b00,   crtc6845::interlace_mode_sync =2b01,   crtc6845::interlace_mode_sync_and_video =2b11 }
enum	crtc6845::t_address {   crtc6845::addr_h_total = 0,   crtc6845::addr_h_displayed = 1,   crtc6845::addr_h_sync_pos = 2,   crtc6845::addr_h_sync_width = 3,   crtc6845::addr_v_total = 4,   crtc6845::addr_v_total_adjust = 5,   crtc6845::addr_v_displayed = 6,   crtc6845::addr_v_sync_pos = 7,   crtc6845::addr_interlace_mode = 8,   crtc6845::addr_max_scan_line = 9,   crtc6845::addr_cursor_start = 10,   crtc6845::addr_cursor_end = 11,   crtc6845::addr_start_addr_h = 12,   crtc6845::addr_start_addr_l = 13,   crtc6845::addr_cursor_addr_h = 14,   crtc6845::addr_cursor_addr_l = 15,   crtc6845::addr_lightpen_addr_h = 16,   crtc6845::addr_lightpen_addr_l = 17 }