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foft, 04/15/2018 07:36 PM
Introduction¶
For now please see the general core manual on the main page.
http://www.64kib.com/
Power requirements¶
USB B 5V input. 500mA is enough but I'd go with 1-2A to give some extra for any connected devices.
Core location¶
v1 prototype¶
http://www.64kib.com/autobuild/private/prototype_v1/
v3 (aka v2!) prototype¶
http://www.64kib.com/autobuild/private/prototype_v2/
v3.1 (aka v3!) prototype¶
http://www.64kib.com/autobuild/private/prototype_v3/
See the file changes for what I've changed.
Issues to solve for final board (solved in v2 fix)¶
- 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.
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
Board setup videos¶
I put together some basic videos for the v2 boards:
https://www.youtube.com/playlist?list=PLYGeDt6lv-p5R4DwdcHtmYUbfL6lOcYLb
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
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.
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, v3.1:??)
- 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...
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.
Board information¶
Updated by foft over 6 years ago · 30 revisions