On Wed, 9 Nov 2022, Steve Lewis wrote:
always imagined it would be possible to "bit
bang" across these external IO
pins with some PALM-assembly -- the machine should be fast enough to encode
7-bit ASCII at 300 baud across those pins, maybe 1200. I'm not sure if
The PALM and thus the 510 is much much faster than that (I guess
about 0.7 MIPS).
I do bit-banging on the Asynchronous Serial I/O card with twice the baud
rate (to sample the center of a bit) and am able to do *full-duplex*
communications *with* terminal emulation *and* character set conversion at
Using the byte mode of the I/O adapter I can go up to 38400 baud (used for
Remember: this card is absolutely dumb, it essentially only has shift
registers and a clock generator. The benefits come from the zero-overhead
interrupt context switches and the great number of fast processor
But back to your questions: I personally have never heard of these
products. I only know that there was a third-party hard disk option.