[ksarul]

I've actually been looking for a Multicom 32K card (I collect the third party peripherals to use as potential inspiration on projects of my own, as they sometimes come to a different answer when designing stuff), so I'm interested in that (it is worth $40 or so to me). The rest is pretty much vanilla TI stuff that I already have.

The pushbutton on the side of the Speech Synthesizer is one of two possibilities: a single-step button for Assembly program testing also known as a Load-Interrrupt switch, or it is a reset button.

You can't do too much testing beyond a smoke test without a console and an Extended BASIC cartridge. Type SIZE in Extended BASIC and it will show you about 24K of memory and 12K of stack space available--that tells you it sees the 32K card. If you type OLD DSK1.TEST and the Disk Controller card lights up and the drive attempts to dind something (and it will give an error when no disk is found), that tells you it sees the disk system--and that it responds. You could type a small program to output some text through the RS-232 port (or the PIO port on the card) by trying to LIST PIO after typing the short program in. I don't remember right now if the PIO part has to have quotes around it (LIST "PIO").

There isn't too much else you can do without some disks/programs to test.