CER-203
[Image:CER-203.jpg|right|thumb|150px|CER-203: CPU testing]
[Image:CER-203 block diagram.png|right|thumb|150px|Block diagram]
CER model 203 is an early digital computer developed by Mihajlo Pupin Institute 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 statisticsIn manufacturing, for production planning and management, market data processing and forecasting, inventory management, financial document management and process modellingIn utilities, to calculate water and electricity consumption, to produce various reports and lists and for technical calculations and designIn construction industry for network planning method design, financial management and bookkeepingIn 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:
- * one 16-cycle instruction: 20 μs
- * one single cycle instruction: 5 μs
- * addition and/or subtraction of two 15-digit numbers: 20 μs
- Capacity: 8 kilowords
- Speed : 1 μs
- Complete, autonomous memory error checking
- Parity control
- Dielectric-based reading
- Speed: 500 to 1,000 characters per second
- Accepts 5, 7 and 8-channel tapes
- Speed: 75 characters per second
- "On the fly" printing
- 128 characters per line
- Removable/replaceable printing cylinder
- Speed:
- * 500 lines per minute for a character set of 63 characters
- * 550 lines per minute for a character set of 50 characters
- Automatic paper feeder
- Two line spacing settings
- Programamtic tape for discontinuous paper movement
- Maximum number of carbon copies: 6
- 132 characters per line
- Speed:
- * Prints 25 alphanumeric characters per second
- * Prints 33 numeric characters per second
- * Tabulation speed: 144 characters per second
- * Blank printing speed: 100 characters per second
- Maximum number of carbon copies: 6
- Capacity: 600,000 characters
- Variable record length
- Transfer rate: 857 characters per second
- Tape speed: 10 inches per second
- Data format: 9-track ASCII with inter-record space of
- Data density: 556/800 bits per inch
- Capacity per tape: 10,000,000 characters
- Tape speed: 24 inches/s, 150 inches/s fast-forward and rewind
- Transfer rate: 19.2 kHz
- Tape width:
- Tape length:
- 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