EclaireXL

h1. Introduction

For now please see the general core manual on the main page.

http://www.64kib.com/

h1. Power requirements

USB B 5V input. 500mA is enough but I'd go with 1-2A to give some extra for any connected devices.

h1. Core location

h2. v1 prototype

http://www.64kib.com/autobuild/private/prototype_v1/

h2. v3 prototype

http://www.64kib.com/autobuild/private/prototype_v2/

See the file changes for what I've changed.

h1. Issues to solve for final board

* Remove video DAC and audio ADC power supplies.

* Verify footprint of main board IO area vs standard. Power switch does not fit?

* Adjust paddle voltage level potential divider.

* Fix black 'éclaireXL' 

* Widen cutout next to pbi from 3.7 to 4.75mm (or more)

* Change REF_N pull up from 4k7 to about 2k.

h2. Potential improvements

* Think again on the sub-board vs external board?

* Header to connect SIO LED to case

* Support hardware to allow main case switch to turn board on/off. Not sure how to go about this...

* Power on switch invert up/down on/off to match 800XL!

* Use 5V boost/buck regulator to give stable 5V

h1. SD card setup

The OS and basic rom are currently loaded from SD card.

See the message here for how to do this:

http://www.64kib.com/redmine/boards/1/topics/22?r=26#message-26

h1. Flashing

Its possible to flash the .sof using the USB blaster, but this only lasts until the board is restarted.

To do this:

#Connect power to the board

#Connect the jtag

#In quartus go to tools->programmer

#In the programmer select 'add file' and choose the .sof file

#Tell it to start

To store on the flash chip you need to make a .jic file. The v1 board has a chip compatible with the EPCQ128. The v3 board has a chip compatible with the EPCS128.

h2. Making a jic file from a sof

# In quartus go to file->convert programming files

# Select programming file type 'jtag indirect programming file'

# Select configuration device (v1:EPCQ128, v3:EPCS128)

# Select mode: Active serial

# Set appropriate file name

# In 'input files to convert' select 'flash loader' and click 'add device' on the right

# Select 'Cyclone V' on left and the correct FPGA on the right (v1: 5CEBA2, v3: 5CEBA4)

# In 'input files to convert' select 'sof data' and click 'add file'

# Select the .sof file to convert 

# Select properties on the new line and enable 'compression'

# All done, click ok to save .jic file

# The flash using the programmer as you would with a .sof - it takes longer but it will last over a reboot

Alternatively I'll post .jics from time to time...

h1. Svideo/composite on v2

On the v2 board svideo and composite are output via the vga connector:

For svideo luma is on the green output and chroma on the blue output.

For composite luma is on the green output.