Information Technology


Supervisory control and data acquisition (SCADA)
pdf Onspec - IBM PC SCADA
pdf Pascal MT+
pdf Elcon - PDP11 SCADA
pdf PDP11 Macro11 Assembler
RealTime Language RTL/2
1985 - 1989

- South Africa (Johannesburg)
  • Bateman Process Instrumentation

Industrial Process Control Automation
pdf Manufacturing
pdf Software Development
pdf Process Control Language PCL
pdf Commander microcomputer
pdf Motorola 6800 microprocessor
1982 - 1984

- South Africa (Johannesburg)
  • pdf Messina Electronics
  • Sugar Mills: Amatikulu, Darnell
  • Breweries: Garankwa, Alrode
  • Soap: Uniliver
  • Messina Mines

Telecommunications Marketing

- South Africa (Johannesburg)
  • STC (Standard Telephones & Cables)

Minicomputers and peripherals
Control Data (CDC) Cyber 17, Cyber 18
pdf PACT minicomputer
pdf Cartridge Disk Drives
pdf Storage Media Drives
pdf Tape (VCTT) Drives
pdf Card Readers
1977 - 1980

- Israel (Haifa)
  • Elbit Computers

Tablet/Mobile website
Tablet/Mobile website

BPI - Johannesburg, South Africa
[1985 - 1989] continued...

BPI developed and supported the larger scale ELCON SCADA package, operating on DEC PDP11 series mini-computers under RSX11M-Plus. The software was mostly written in RTL/2 with some encapsulated PDP11 Macro Assembler code and was developed internally, by BPI, between 1981 and 1989. The development team comprised of Abel Acuna, Peter Moffat, Kobus Oosthuizen, Neil Gaynor, Ludwik Tomalak, Phillip Delcroix, Andre Kuzner, Ian Read, Peter Tandy, Stan Komar, Steve MacKenzie, Paul Tennant, Dr. Rob Clarkson and Tedy Shalev (myself).

My involvement was chiefly in three areas: as Team Leader and member of the same team, in the FEP - Front End Communication Co-processor project and as sole developer of the Alarm Annunciator and the FEP Comms QZ11 driver retrofit.

Front End Communication Co-processor

The control devices traditionally connected to SCADA systems mostly used either asynchronous or synchronous serial communication. The serial I/O devices for PDP11 that were available at the time did not provide much on board buffering. Each such device required CPU service on input interrupt and so system performance was critically affected by high traffic volumes at high baud rates. In order to offload this activity, a project was initiated to move the serial communication required by the system into a Front-end Communications Co-processor, or FEP for short. The specification called for diskless PDP11 satellite FEPs networked back to multiple host stations on a Positronika TechLAN network.

This project proceeded timeously and was completed within the estimated time. No problems have been experienced in the field as a result of software faults, subsequent to the release of the final approved version.

The Prospecton Breweries - ELCON with FEPs installation - Durban, South Africa PDF document
1985 - 1989
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