Strange thing, your monitor did not support this very common resolution. On the other hand: it’s a typical standard definition NTSC TV resolution. So maybe it’s more commonly supported by TVs than monitors.
But nice to see you solved those issues. I had similar problems (BSOD) programming the flash chip via JTAG and USB blaster clone (since i bought the simple kit without a preprogrammed flash)… but figured it out myself too. So i know exactly how frustrating such troubleshooting can be… and how satisfying it is, to find a solution.