What is the Agon Light, and what is the Agon Console8

The Agon Light is a modern, fully open-source, 8-bit microcomputer and 
microcontroller in one small, low-cost board, designed by Bernado Kastrup
aka The Byte Attic. As a computer, it is a standalone device that requires
no host PC: it puts out its own video (VGA), audio (2 identical mono 
channels), accepts a PS/2 keyboard and has its own mass-storage in the 
form of a µSD card. 

The Olimex Agon Light 2 and the Agon Light Origins edition are variations
on the original Agon Light design.

The Agon Console8 is a version of the Agon Light that also includes two
Atari-compatible joystick ports, and a PS/2 mouse port, and a stylish case. 
It was also designed by Bernado Kastrup aka The Byte Attic, and is 
manufactured by Heber Ltd.

The Agon Light, Olimex Agon Light 2, and the Agon Console8 are all fully
compatible with each other. Software written for one will run on the other, 
and the same firmware can be used on both. In this documentation,
generally, the term “Agon Light” is used to refer to all variations.

The main CPU is an eZ80F92, a modern Zilog Z80 microcontroller that is
fully backwards compatible with the Z80. As well as running in a
traditional 8-bit mode with a 64K address space, it can run in 24-bit
mode with a  16MB address space, and is also capable of running in a
hybrid mode with a mixture of 24-bit and 8-bit code.

The eZ80F92 integrates a number of standard peripherals, including a 
UART, and hardware timers.

There is a second CPU dedicated to handling video, sound, and keyboard, 
an ESP32-Pico-D4. This co-processor  is linked to the eZ80F92 via a UART
(a high speed serial communications link), and acts as a graphics terminal.