Here's the idea-to use the L293 as a one direction speed control with PWM on the enable. Theoretically I could do something like this:
With a pull-up and a pull-down to the logic pins respectively to keep one high and one low. The problem is when I tried it, this happened:
The motor never moved and the chip and the board are one now, I'm afraid. Luckilly I bought about 8 of these.