The 840 Medical Ventilator is a highly sophisticated medical
device used in the context of life support.
Our participation in the 840 project extended over a period
of more than seven years, and we had the privilege of contributing
both to the original design and to a subsequent cost-reduced and
enhanced design.
Here is a partial list of our activities in support of 840
development:
Ported the TCP/IP protocol stack used in a private
ethernet connection between the major system components.
Developed and maintained "PBMON," a development, diagnostic,
utility, and monitoring program used extensively during the
project. PBMON was ultimately validated for specific use as
a system test tool.
Invented, conceptually designed, and implemented a new-technology
infrared touchscreen (see extensive details
here).
Analyzed and redesigned a keyboard interface,
significantly improving its reliablity.
Designed and programmed a general-purpose test device used to
power-cycle 840s during system test.
Authored and revised signficant documentation describing
many systems and subsystems of the 840 ventilator.
Performed analysis and qualification of a backlight power supply.
Supervised the compilation and publishing of a CD-ROM based
series of software distribution disks.
