October 4, 2023
Olimex AgonLight2 8-bit open-source {hardware} laptop sells for 50 Euros

Olimex has began to take pre-orders for the AgonLight2, a custom-made model of the Agon Gentle 8-bit open-source {hardware} laptop based mostly on the Z80 household and operating BBC Fundamental.

Bernardo Kastrup and Dean Belfield created the Agon mild 8-bit retro laptop with VGA and PS2 keyboard port and programmable with BASIC earlier this yr and launched all {hardware} design information, the firmware, and documentation on GitHub, and Dean uploaded a one-hour-long video on YouTube. It was designed with EasyEDA, however Olimex re-captured the design in KiCad after getting buyer requests, and the brand new cost-optimized board named AgonLight2 will begin transport by the tip of January 2023.

Olimex Agonlight2 (left) vs unique 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 particulars)
  • System Reminiscence – 512KB, 10ns, parallel SRAM
  • Storage – 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 decision, 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 management port with 20 GPIOs
    • UEXT enlargement board for Olimex add-on modules
  • Energy Provide
    • 5V through USB Kind-C port or management port; DCDC converter (as much as 2A)
    • LiPo battery help with charging circuit, 2-pin connector, and Vbat on management port
  • Dimensions – TBD
Agon light block diagram
Agon mild block diagram

The primary adjustments made by Olimex are highlighted in daring within the specs above, however I’ll checklist 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, tablets and gadgets as mandated by 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 changed with a DCDC transformed which delivers as much as 2A present
  • Added help 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 permit AgonLight to be powered by this connector too.
  • Added a UEXT connector for Olimex modules
  • A number of different small adjustments and a lot of the parts had been modified to Olimex’s element base to decrease prices

The brand new AgonLight2 helps the identical Quark firmware because the Agon mild with three modules: Quark BBC BASIC, Quark MOS, and Quark VDP which might be discovered within the GitHub repo linked within the introduction. Olimex talked with Bernardo to verify it was a very open-source {hardware} venture earlier than, and the up to date board is now even featured on the official venture’s web page. The KiCad {hardware} design information and datasheets for the AgonLight2 board might be discovered on GitHub.

Olimex is taking pre-orders for 50 Euros for the AgonLight2, which appears to be like like a fairly good value contemplating the Agon Gentle board had an estimated BoM value of round $50 for a small manufacturing run. Transport is anticipated to begin on January 31, 2023.

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