Wang PCS-II

A quite conservative design for 1977. At the same time there already was the PET2001 with the 6502 microprocessor. The BASIC was directly interpreted via microprogram, programming in assembler is not possible.

Both floppy drives (5,25", hard-secorized) mounted on the round case are organized like magnetic tape drives: The Data is always written at the end, files aren't deleted but marked as illegal. If the end of the disk is reached, the user has to copy his "full" disk to an other. Thus the files marked as "deleted" are left and so their space is still available on the target drive.

On the postcard pasted on the computer, you can recognize that there was a predecessor without a floppy drive with a cassette recorder. Wang had the same problems with the extension of the drives like HP some years before....