Programming an SST39SF040 with the T48 and minipro

I’ve only ever programmed DIP EEPROMs with my XGecu T48, and entirely for retrocomputers of the 8 and 16-bit variety. But I wanted to revive an old motherboard with a dead BIOS chip, so I sourced a replacement and programmed it. The chip in question is a SST39SF040, an EEPROM in a PLCC package. This necessitated buying a carrier adaptor from AliExpress to allow the T48 to interface with it: For those with a keen eye, yes, that’s a USB cable from an old 250 MB Iomega Zip drive! All these years later, and it still works. How many modern USB-C cables with their cacophony of supported (or not) features will we still be using in twenty years? Maybe more than I give them credit for, but also, maybe not? Anyway, I fired up Minipro, and checked that it supported the appropriate EEPROM: # minipro -l | grep 39SF040 ==> SST39SF040 ==> SST39SF040@PLCC32 ==> SST39SF040@TSOP32 ==> SST39SF040@TSOP32(ADP:Pin9to1) I downloaded the most current BIOS image from The Retro Web, and imaged it across: #…