EOS (8-bit operating system)

Elementary Operating SystemDeveloper| Coleco Industries, Inc.

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Written in| Z80 Assembly language
Working state| Discontinued, historic
Initial release| 1983; 43 years ago (1983)
|Final release|Latest release}}| EOS-7
Available in| English
Platforms| Coleco Adam
Default user interface| Text user interface
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]

## Contents

* 1 Overview
* 1.1 Executive calls
* 1.2 Console Output
* 1.3 Printer Interface
* 1.4 Keyboard Interface
* 1.5 File Operations
* 1.6 Device Operations
* 1.7 Video RAM Management
* 1.8 Game Controllers
* 1.9 Sound Routines
* 1.10 Subroutines
* 2 References
* 3 External links

## Overview

EOS-API[2] with Doxygen

The functions are grouped into categories as follows.[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

## References

1. ↑ BASIC bindings
2. ↑ C bindings
3. ↑ EOS Programmer's Manual
4. ↑ https://web.archive.org/web/20170815223823/http://www.theadamresource.com/articles/eos/date_stamping.html
5. ↑ https://web.archive.org/web/20170815223017/http://www.theadamresource.com/articles/assembly/game_controller_input.html

## External links

* Technical Reference Manual chapter 3
* EOS-5 source code
* Boot code, Forum

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