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Upgrading DSLogic Basic to Plus without EEPROM modification

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BH3XON:
Great!  I try,thank you reply!

BH3XON:
I tried the method of hyyytt, covering the res of 1.0.1 with the 0.9.9 version of the res file.

but, opening 1.0.1 is still recognized as the u2b version。

my modification:

1. 64M --》 256M;
2.EEPROM  edit PID;
3.DSVIEW 0.9.9  res  replace--》 1.0.1 res
   File from  https://github.com/miniwave/DSview_v0.99
4.open DSVIEW 1.0.1   Identified as U2B     fail!

Attached is the HEX file after modifying the PID

 tell me what is wrong?

Enginerding:
Can the U2Basic be upgraded to the same specs as the Pro, just like the previous Basic?

I got sent a U2B from Aliexpress w/ out the shielded fly wires, instead of the Basic.  Poop.  Filed a claim and got offered to ship it back (>$20) or take a 50% refund.  7 days to appeal.  I can buy the fly wires separate for $~25.

Crazy_Fox:
Got the crappy DSLogic U2Basic

There are at least absent PCB trace from FPGA to RAM chip, so according to the MT48LC16M16A2 datasheet A12 pin (last pin of address bus) is not connected, so at least 16x16 DRAMs cannot be addressed fully.

Seems we can add some wire with the same length as another traces for address bus, but I'm not sure that this is the only change in the PCB design.

Crazy_Fox:
Hi, Team

As my 256Mb chip still in transit, I decided to play a little with EEPROM.

I'm pretty lazy, so decided to connect 4th and 7th pins with small wire instead of desoldering EEPROM chip. But unfortunately, fx2lafw_eeprom_loader.exe unable to find my U2Basic due to 0029 PID, so I've modified .exe file to enable support U2Basic instead of Basic (just replaced 21 to 29 in offset 0x00008472).

After that I was able to load Basic firmware to the U2Basic and now it works as old good DSLogic Basic (with 400MHz sample rate and 256Kb buffer).

If you are interested in - feel free to use it. In the archive - fx2lafw_eeprom_loader with 0029 PID instead of 0021, .hex dump of DSLogic U2Basic EEPROM, and .hex dump of DSLogic Basic EEPROM.

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