What is Intertec Superbrain?
The Intertec Superbrain was an all-in-one 8-bit microcomputer released in 1979 by Intertec Data Systems. It integrated a keyboard, monochrome monitor, and dual floppy disk drives into a single desktop unit running the CP/M operating system. It served as an affordable, standalone business workstation during the early microcomputer revolution.
Key Takeaways
Released in 1979 as one of the earliest successful all-in-one commercial desktop computers.
Powered by dual Zilog Z80 processors, separating main processing from disk input/output operations.
Utilized the CP/M operating system, the industry standard for business software before MS-DOS.
Bundled everything into a single cabinet, reducing cable clutter and setup complexity for offices.
Offered significant cost savings compared to contemporary modular business systems.
History and Evolution
Intertec Data Systems, based in Columbia, South Carolina, originally manufactured computer terminals. In the late 1970s, they realized they could build a complete computer inside a terminal chassis. The Superbrain debuted in 1979 for under $3,000, which was disruptive at a time when business systems cost much more.
The original model featured twin, single-sided disk drives. Intertec later expanded the lineup with the Superbrain QD (Quad Density), which doubled disk storage capacity, and the Superbrain II, which improved the disk controller hardware and reliability. The system remained popular in offices and schools until the IBM PC established the 16-bit architecture as the new industry standard in the early 1980s.
How the Intertec Superbrain Works
The architecture of the Superbrain relies on a master-slave dual-processor configuration to maximize efficiency. The main Zilog Z80A CPU handles user software execution, system memory management, and terminal display routines. A secondary Zilog Z80 processor, dedicated strictly to disk controller operations, manages data transfers between the floppy drives and the system memory.
This separation prevents disk access routines from slowing down the primary system operations. When a user runs a program, the master processor requests data from the slave controller, which reads the floppy disk tracks and loads the data into the shared system RAM.
Technical Specifications
| Component | Specification |
|---|---|
| Primary Processor | Zilog Z80A running at 4 MHz |
| Disk Processor | Zilog Z80 running at 4 MHz |
| System Memory | 64 KB RAM |
| Built-in Display | 12-inch Monochrome CRT (80 characters by 24 lines) |
| Internal Storage | Dual 5.25-inch floppy disk drives |
| Operating System | CP/M 2.2 |
| Interface Ports | Dual RS-232C serial ports |
Advantages and Limitations
Advantages
The integrated design eliminated external drive enclosures and complex cabling setups.
Dual processors prevented system lag during intense disk read and write processes.
Access to the vast CP/M software library provided immediate business utility.
Exceptionally competitive pricing made digital record-keeping accessible to small businesses.
Limitations
The power supply ran hot inside the unvented plastic enclosure, causing reliability issues over time.
The built-in display lacked bitmapped graphics support, limiting the system to text-only applications.
Non-standard disk formats made sharing data with non-Intertec systems difficult without specialized conversion software.
Real-World Applications
The Superbrain operated primarily in commercial and educational environments. Small businesses utilized the system for word processing, spreadsheet modeling, and accounting ledger maintenance. Universities and technical institutes deployed banks of Superbrains in computer labs to teach programming languages like BASIC, COBOL, and FORTRAN under the CP/M environment.
Related Technology Terms
CP/M (Control Program for Microcomputers): The dominant 8-bit operating system developed by Digital Research.
Zilog Z80: A highly popular 8-bit microprocessor used in countless computers and arcade games in the late 1970s and 1980s.
All-in-One Computer: A form factor housing the motherboard, monitor, and drives inside a single physical casing.
CRT (Cathode Ray Tube): The electronic display technology used in vintage computer monitors and televisions.