P112 question - what can you run that uses 1MB of RAM?

Don't you actua;ly need a printer with the driect 'video' interface for those cards? For CX printers (Lasterjet, etc) that means removing the formatter board and wiring the 34 pin header on the DC controlelr board that conencted to the fomatter to a DC37 conenctor. And if you want, wiring some status LEDs to the appropriate conenctor on the DC controller. The result is a 'CX-VDO' printer. For SX printers (Lasterjet II,. etc), the original way to get this 'video' interfce was to replace the formatter board iwth a buffer board, whioch also includes the necessary DC37 socket. However, IIRC, there wa a3rd party board that fitted the optiaonal interface slot on Canon/HP formatter bords and which provided this interface whille leavign the formatter in position. I have never seen this board, though.

The problem with running a CX printer today is tht the toner cartridges are essentialyl unobtainium. I don't use the one on my PERQ for this reason.

I suspec tthe origianl Laserjet is heaver.