F256 JR.

PRODUCT SPECIFICATIONS

Development Tools

Foenix IDE (Emulator)
(Development System for Foenix Products)

https://github.com/Trinity-11/FoenixIDE/releases

Calypsi C/ASM 65C02 Tool Chain
(Supports Foenix Products)

https://www.calypsi.cc/

F256 Foenix Emulator
(Emulator for the F256 Jr)

https://github.com/paulscottrobson/junior-emulator

General Specifications


SYSTEM


 Low-Cost WDC W65C02S System

  • CPU: WDC65C02 @ 6.29Mhz (Available)
System General Memory
  • 256KBytes Static RAM
  • 512KBytes FLASH
Options (extra cost)
  • TQFP or DIP (Socket) for CPU
  • ZIF Sockets for the SIDs
  • 256K RAM Expansion Module (Code Memory)
Future Options
  • 65C816 CPU Support @ 6.29Mhz (Need the DIP Socket for Upgrade)
  • FNX6809 CPU Upgrade @ 6.29Mhz (Custom HD6803/MC6809) for the F256 Jr Socket.
Software Support
  • Comes with an Installed (Flashed) micro-kernel & SuperBASIC on BOOT
  • Can be reflashed with user software
  • USB background debug port to read and write directly in memory to speed up development

Reference Manual

https://github.com/pweingar/C256jrManual/blob/main/tex/f256jr_ref.pdf

VIDEO SUB-SYSTEM

Graphics Engine

TinyVicky (CFP9599)

Resolutions

Text Modes:
80×60, 40×60, 80×30, 40×30 (@ 60Hz)
80×50, 40×50, 80×25, 40×25 (@ 70Hz)
Graphics Modes:
320×240 @ 60Hz
320×200 @ 70Hz

Color Depth

256 Colors – 8bits Per Pixel – For All Modes. (4x LUT)

 

Graphics Engine Features

3 Layer System + Interstitial Sprites Layer
Can be any choices of Bitmap or Tiles.
Out of 3x Bitmap Layers
Out of 3x Tilemap Layers
64x Sprites Muxable (8×8, 16×16, 24×24, 32×32)
DMA Engine (Non-Transparent)

SYSTEM MISC


Media

IEC Port – Commodore Drive
Full-Size SDCard

Communication Ports

1x Simple UART Port or WIFI (ESP Feather Board)

Joysticks

2x Atari Style Input (Through the VIA)
1x NES/SNES Connector for NES/SNES Adapter (excluded)

Others

Single Row Connector to interface with C64 Keyboard or to use as a IO Connector.
Expansion Connector to allow Memory Expansion or Else.

AUDIO SUB-SYSTEM

FPGA Sound

2x Instances of PSG – SN76489
3x Voices Per Channel or 6x Voices Mono

Stereo SID Unpopulated Sockets

2x SID with +9V/+12V power rail & Mono/Stereo select
Accessible Analog Input

Audio Sampling

No DAC Port (as of the writing of this specs)

Misc

RCA Stereo Line-Out
1/8″ inch Headphone Output Connector

 

MECHANICAL SPECS

 

Enclosure Dimension

6.75″x6.75″ Mini-ITX Standard Form Factor

Product Weight 

TBD