Olimex AgonLight2 8-bit open-source {hardware} pc sells for fifty Euros

Olimex AgonLight2 8-bit open-source {hardware} pc sells for fifty Euros

Olimex has began to take pre-orders for the AgonLight2, a custom designed model of the Agon Mild 8-bit open-source {hardware} pc in line with the Z80 circle of relatives and operating BBC Elementary.

Bernardo Kastrup and Dean Belfield created the Agon mild 8-bit unfashionable pc with VGA and PS2 keyboard port and programmable with BASIC previous this yr and launched all {hardware} design recordsdata, the firmware, and documentation on GitHub, and Dean uploaded a one-hour-long video on YouTube. It was once designed with EasyEDA, however Olimex re-captured the design in KiCad upon getting buyer requests, and the brand new cost-optimized board named AgonLight2 will get started delivery by way of the tip of January 2023.

AgonLight2
Olimex Agonlight2 (left) vs authentic Agon mild board (proper)

AgonLight2 specs:

  • MCU – Zilog eZ80F92 8-bit microcontroller @ 18.423 MHz with 128 KB flash, 256 bytes configuration Flash reminiscence, 8 KB SRAM (See PDF datasheet for main points)
  • Device Reminiscence – 512KB, 10ns, parallel SRAM
  • Garage – MicroSD card socket
  • Terminal subsystem
    • MCU – ESP32-PICO-D4 dual-core SiP @ as much as 240 MHz with 4MB flash
    • Reminiscence – 8MB, 133 MHz, serial PSRAM
    • Video Output – VGA port as much as 640×480 solution, 64 colours
    • Audio – 2x mono audio jacks
    • USB 2.0 Kind-C port for energy and programming ESP32’s firmware
    • USB Kind-A port for keyboard
  • Programming – ZDI port for programming the firmware of the CPU
  • Expansions
    • Plastic boxed regulate port with 20 GPIOs
    • UEXT enlargement board for Olimex add-on modules
  • Energy Provide
    • 5V by means of USB Kind-C port or regulate port; DCDC converter (as much as 2A)
    • LiPo battery beef up with charging circuit, 2-pin connector, and Vbat on regulate port
  • Dimensions – TBD
Agon light block diagram
Agon mild block diagram

The primary adjustments made by way of Olimex are highlighted in daring within the specifications above, however I’ll record them once more for extra readability:

  • Changed the USB-An influence connector with a USB-C connector as it’s utilized in all new telephones, drugs and gadgets as mandated by way of a brand new EU directive
  • Changed the PS2 connector with a USB-A connector for connecting USB keyboards with out an adapter
  • The Linear voltage regulator was once changed with a DCDC transformed which delivers as much as 2A present
  • Added beef up for LiPo batteries
  • Changed the naked header 32-pin connector with a plastic boxed 34-pin connector, including two further indicators Vbat and Vin which enable AgonLight to be powered by way of this connector too.
  • Added a UEXT connector for Olimex modules
  • A couple of different small adjustments and many of the parts had been modified to Olimex’s element base to decrease prices

The brand new AgonLight2 helps the similar Quark firmware because the Agon mild with 3 modules: Quark BBC BASIC, Quark MOS, and Quark VDP which will also be discovered within the GitHub repo connected within the advent. Olimex talked with Bernardo to ensure it was once a actually open-source {hardware} mission earlier than, and the up to date board is now even featured at the legitimate mission’s web page. The KiCad {hardware} design recordsdata and datasheets for the AgonLight2 board will also be discovered on GitHub.

Olimex is taking pre-orders for fifty Euros for the AgonLight2, which looks as if a sexy excellent worth taking into account the Agon Mild board had an estimated BoM charge of round $50 for a small manufacturing run. Transport is predicted to begin on January 31, 2023.

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