Hardware: Difference between revisions

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=== Overview and Comparison ===
=== Overview and Comparison ===
{| class="wikitable"
{| class="wikitable"; style="text-align:left;"
|+
!
!F256Jr
!F256K
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"; style=text-align:left;" |CPU
! scope="row"; style="text-align:left;" |
! scope="row"; style="text-align:left;" |
F256Jr
! scope="row"; style="text-align:left;" |
F256K
|- style="vertical-align:top;"
! scope="col"; style="text-align:left;" |
CPU
|
|
WDC 65C02<br/>
WDC 65C02<br/>
Line 16: Line 19:
FNX 6809<br/>
FNX 6809<br/>
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"; style=text-align:left;" |RAM
! scope="col"; style="text-align:left;" |
RAM
|
|
512 KB<br/>
512 KB<br/>
Line 24: Line 28:
Optional 256K RAM expansion module available<br/>
Optional 256K RAM expansion module available<br/>
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"; style=text-align:left;" |Flash
! scope="col"; style="text-align:left;" |
Flash
|
|
512 KB<br/>
512 KB<br/>
Line 32: Line 37:
Optional 256K Flash Modules<br/>
Optional 256K Flash Modules<br/>
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"|Graphic Chip
! scope="col" style="text-align:left;" |
Graphic Chip
|
|
TinyVicky
TinyVicky
Line 38: Line 44:
TinyVicky
TinyVicky
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"; style=text-align:left;" |Audio
! scope="col"; style="text-align:left;" |
Audio
|
|
2 x PSG (Sn76489)<br/>
2 x PSG (Sn76489)<br/>
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CODEC<br/>
CODEC<br/>
|- style="vertical-align:top;"
|- style="vertical-align:top;"
! scope="col"; style=text-align:left;" |Connections
! scope="col"; style="text-align:left;" |
Connections
|
|
1 x DVI (digital & analog)<br/>
1 x DVI (digital & analog)<br/>

Revision as of 12:33, 27 January 2024

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 Mini-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 Mini-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. Note, however, that while the 65c02 includes the additional Rockwell instructions (BBS/BBR, RMB/SMB), the 65816 does NOT. Therefore, these instructions should be avoided to ensure compatibility with F256 machines using 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).

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