Hardware

Overview and Comparison

	F256Jr	F256K
CPU	WDC 65C02 WDC 65816S FNX 6809	WDC 65C02 WDC 65816S FNX 6809
RAM	512 KB Optional 256K RAM expansion module available	512 KB Optional 256K RAM expansion module available
Flash	512 KB Optional 256K Flash Modules	512 KB Optional 256K Flash Modules
Graphic Chip	TinyVicky	TinyVicky
Audio	2 x PSG (Sn76489) 2 x SID socket	2 x PSG 2 x SID hardware emulation on board OPL3 CODEC
Connections	1 x DVI (digital & analog) 1 x PS2 (Mouse / External Keyboard) 1 x Commodore syle IEC Port 1 x Headphone 3,5 1 x RCA Line Out 2 x Serial Port Pin-Header 1 x Mni USB Debug Port 1 x Power 12V / 2A, 2,5mm Barrel Connector 1 x SD Card Slot 2 x Joystick Atari style Pin-Header 1 x PIN-Header onboard for SNES/NES Joystick Connector Box 1 x RAM Expansion Slot (on Top) 1 x JTAG Port for system updates (on bottom) 1 x Wifi Module ESP32 Feather (internal) 1 x Real Time Clock Battery CR2032 (internal)	1 x DVI (digital & analog) 1 x PS2 (Mouse / External Keyboard) 1 x Commodore syle IEC Port 1 x Headphone 3,5 1 x RCA Line Out 1 x Serial Port DB9M / 1 x Serial Pin Header 1 x Mni USB Debug Port 1 x Power 12V / 2A, 2,5mm Barrel Connector 1 x SD Card Slot 2 x Joystick Atari style DB9 Connector 1 x Mini-DIN9 for SNES/NES Joystick Connector Box 1 x RAM Expansion Slot (on Top) 1 x JTAG Port for system updates (on bottom) 1 x Wifi Module ESP32 Feather (internal) 1 x Real Time Clock Battery CR2032 (internal)

Details

CPU

The basic setup of all F256 is the Western Design Center 65C02, a slightly enhanced CMOS version of the very popular 6502 CPUs. The main difference to the 6502 in the 1970s and 1980s is the faster clock speed and the lower power consumption.

The 65C02 can also be replaced with a 65816 as a drop in replacement. The 65816

In the F256, the CPU is always clocked at 6,29 MHz (6,293,750 Hz to be exact, derived from 25.175 MHz / 4 as discussed on Discord).