The C1P series marked Ohio Scientific's 1978 formal entry into the low-cost, mass-marketed personal computer marketplace. The Challenger 1P computer is effectively a Superboard II single-board computer plus case and power supply. Features include:
- A full 53-key ASCII-like keyboard.
- NTSC video display with scrolling and character editing capability.
- Cassette storage using the Kansas City audio cassette standard.
- Microsoft 8K BASIC in ROM.
- Machine code monitor in ROM.
- A minimum of 4K RAM.
- Full upper/lower-case capability.
The C1P can be expanded using the 610 accessory board. This allows up to 32K RAM and dual mini-floppies to be added, along with expansion to the model 620 BUS adapter.
- CPU: 6502 microprocessor running at 1MHz.
- The two system interrupts are routed to the model 610 expander board.
- 8K BASIC-in-ROM plus 2K monitor ROM.
- 6850 UART 300 baud cassette interface adapter.
- Serial interface, capable of being routed to RS232 or printer ports.
- Direct access 1KB video display capable of 32x32 characters (NTSC output).
- Up to 8KB socketed RAM (4KB supplied by default).
Our C1P is in its original box and has a variety of software on home-recorded cassettes. It also comes with the following printed documentation:
- The Challenger 1P Technical Report: A comprehensive discussion of the Ohio Scientific Personal Computer Systems.
- Superboard II/Challenger 1P Users Manual (Preliminary).
- Challenger Graphics Set reference card.
- The Challenger Character Graphics Reference Manual.
- The 8K BASIC-in-ROM Reference Manual.
Manufacturer: Ohio Scientific
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