CER-203
Appearance
CER (Serbian: Цифарски Електронски Рачунар – Digital Electronic Computer) model 203 was an early digital computer developed by Mihajlo Pupin Institute (Serbia) in 1971. It was designed to process data of medium-sized businesses:
- In banks, for managing and processing of accounts, bookkeeping, foreign-currency and interest calculations, amortization plans and statistics
- In manufacturing, for production planning and management, market data processing and forecasting, inventory management, financial document management and process modelling
- In utilities, to calculate water and electricity consumption, to produce various reportsand lists and for technical calculations and design
- In construction industry for network planning method design, financial management and bookkeeping
- In trading companies for payment processing, market analysis, inventory management and customer and partner relationship management
Specifications
Central Processing:
- Type: BMS-203
- Number of instructions: 32
- Performance:
Primary memory:
- Capacity: 8 kilowords
- Speed (cycle time): 1 μs
- Complete, autonomous memory error checking
- Parity control
Punched tape reader:
- Dielectric-based reading
- Speed: 500 to 1,000 characters per second
- Accepts 5, 7 and 8-channel tapes
'Tape puncher:
- Speed: 75 characters per second
Parallel Line Printer 667:
- "On the fly" printing
- 128 characters per line
- Removable/replaceable printing cylinder
- Speed:
- Automatic paper feeder
- Two line spacing settings
- Programamtic tape for discontinuous paper movement
- Maximum number of carbon copies: 6
Independent Printer M 30:
- 132 characters per line
- Speed:
- Maximum number of carbon copies: 6
Magnetic cassettes 4096:
- Capacity: 600,000 characters
- Variable record length
- Transfer rate: 857 characters per second
- Tape speed: 10 inches per second
Magnetic Tape Drives:
- Data format: 9-track ASCII with inter-record space of 0.6 inches (1.524 cm)
- Data density: 556/800 bits per inch
- Capacity per tape: c. 10,000,000 characters
- Tape speed: 24 inches/s, 150 inches/s fast-forward and rewind
- Transfer rate: 19.2 kHz
- Tape width: 1/2 inch (1.27 cm)
- Tape length: 2400 ft (731.52 m)
- Working ambient temperature range: 5 °C to 40 °C
- Relative humidity: up to 80%
- Integrated circuit control logic
- Separate control panel for each drive
- Read/Write Capabilities:
- Read and Write forward
- Read forward
- Read reverse
See also
References
- M.Momcilovic, D.Hristovic, P.Vrbavac et al.:"Domaci cifarski el.racunari CER", Zbornik Savetovanja AOP u preduzecima, pp. 38–58, Nova Varos YU, May 22, 1969. (in Serbian);
- Miodrag Momcilovic, Miladin Dabic:"Domaci el. sistem za obradu podataka CER 203", Proc.of the VI yougoslav Symposium on AOP, Zagreb, 1972. (in Serbian).