EOS (8-bit operating system) explained

Elementary Operating System
Developer:	Coleco Industries, Inc.
Supported Platforms:	Coleco Adam
Ui:	Text user interface
Latest Release Version:	EOS-7
Programmed In:	Z80 Assembly language
Language:	English
Working State:	Discontinued, historic
License:	Proprietary software

EOS is the built-in operating system of the Coleco Adam. There are bindings in high-level programming languages like BASIC.^[1]

Overview

The functions are grouped into categories as follows.^[2] ^[3]

Executive calls

eos_init
eos_hard_init
eos_hard_reset_net
eos_delay_after_hard_reset
eos_synchronize_clocks
eos_scan_for_devices
eos_relocate_pcb
eos_soft_init
eos_exit_to_smartwriter
eos_switch_memory_banks

Console Output

eos_console_init
eos_console_display_regular
eos_console_display_special

Printer Interface

eos_print_character
eos_print_buffer
eos_printer_status
eos_start_print_character
eos_end_print_character

Keyboard Interface

eos_keyboard_status
eos_read_keyboard
eos_start_read_keyboard
eos_end_read_keyboard

File Operations

eos_file_manager_init
eos_check_directory_for_file
eos_find_file_1
eos_find_file_2
eos_find_file_in_fcb
eos_check_file_mode
eos_make_file
eos_update_file_in_directory
eos_open_file
eos_close_file
eos_read_file
eos_write_file
eos_trim_file
eos_initialize_directory
eos_reset_file
eos_get_date^[4]
eos_put_date
eos_delete_file
eos_rename_file

Device Operations

eos_find_pcb
eos_find_dcb
eos_request_device_status
eos_get_device_status
eos_soft_reset_device
eos_soft_reset_keyboard
eos_soft_reset_printer
eos_read_block
eos_read_one_block
eos_start_read_one_block
eos_end_read_one_block
eos_write_block
eos_write_one_block
eos_start_write_one_block
eos_end_write_one_block
eos_start_read_character_device
eos_end_read_character_device
eos_read_character_device
eos_start_write_character_device
eos_end_write_character_device
eos_write_character_device

Video RAM Management

eos_set_vdp_ports
eos_set_vram_table_address
eos_load_ascii_in_vdp
eos_put_ascii_in_vdp
eos_write_vram
eos_read_vram
eos_put_vram
eos_get_vram
eos_write_vdp_register
eos_read_vdp_register
eos_fill_vram
eos_calculate_pattern_position
eos_point_to_pattern_position
eos_write_sprite_table

Game Controllers

eos_read_game_controller^[5]
eos_update_spinner

Sound Routines

eos_sound_init
eos_sound_off
eos_start_sound
eos_play_sound
eos_end_sound

Subroutines

eos_decrement_low_nibble
eos_decrement_high_nibble
eos_move_high_nibble_to_low_nibble
eos_add_a_to_hl

External links

Notes and References