[ ... TCDS runs not much faster than IOASIC SCSI on MAXINE ... ]

>> I compared PMAZ-A and PMAZB-A TC option cards side by side, and wow,

And another pong from atop of my head (liting a bulb), both don't have
any crystal osccilator on board, then the TCDS might be clocked by TC
itself just like PMAZ-A... (fading scream)

Tohru Nishimura
Nara Institute of Science and Technology