I got my 5 boards this week, the new budget version. Budget because no Ethernet, no isolated RS232 on DB9, and no isolated microUSB on this version. Edge connector instead of the official Molex 100 pin male part. This board has two 6 pin headers for two FTDI-TTL adapters, plus headers for a FT2232H mini module.
One serial port is for the generic user serial port, so can also do bandwidth hack trick on the old <= v3.39 firmware models. But not on -c models. For those I think only BDM port reflashing will work.
The other serial port is the VxWorks diagnostics port, with CTRL-X to reboot.
Both ports accessible at the same time via a FT2232H mini module, and then mini-USB cable to your PC.
Board has the 10 pin BDM port, and a slot for and ESP32 DevKit for Bluetooth or WiFi web server.
Plus of course a DS1744W RTC that can take over from the TDS3K main board DS1742W which has flat battery after 15 years. For that to work, either some patch work on the mainboard and re-using pin EXTCLK while disabling the old DS1742W - or a boot rom code edit that remaps the NVRAM/RTC /CS2 to /CE1 on the 100 pin connector. Lot of hassle, but proven feasible. the upside is no need to open the scope, no need to solder patch wires inside.
Tested OK on an old TDS3034 (no-suffix).
KiCad with Gerbers attached.
Works OK with the Abatron BDI2000. Still on my list of things to do: stand alone PC C or Java code that can program/erase the TDS3000 flash roms via BDM, via the XPC860 PowerPC. The BDM pins are linked to the FT2232H mini module, so must be feasible, but will be quite a project ahead still.