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Toshiba Pasopia 7
1983 8-bit computer from Toshiba From Wikipedia, the free encyclopedia
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Toshiba Pasopia 7 (also known as PA7007) is a computer from manufacturer Toshiba, released in 1983 and only available in Japan, with a price of $1350.[1][2][3][4][5]
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It was intended as the successor of the Toshiba Pasopia, offering improved sound and graphics. The machine is partially compatible with the original Pasopia, and supports connecting cartridge-type peripherals.
Graphic memory is increased to 48 KB and two SN76489 sound chips are available, producing six five-octave channels and two noise channels.[6]
A new version of the operating system, T-BASIC7, is also available.[7] This version is based on Microsoft BASIC and adds specific commands for this model, such as higher numerical precision or support for extra colors.
Available peripherals for the Pasopia 7 are a 5" disk drive, a Chinese characters ROM, a RS-232 interface and a printer. The keyboard is full-stroke JIS standard, with a separate numeric keypad and some function keys.[8][6]
After 1988, some Pasopia 7 computers were donated to other countries (ex: Poland) under the "International Development of Computer Education Program".[4][5]
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Related models
Released in 1985, the Pasopia 700[9] is based on the Pasopia 7, and was intended as a home learning system developed by Toshiba and Obunsha. Two disk-drives were added to the side of the main unit and the keyboard is separate. This machine has two cartridge slots (one at the front).
Color palette
The Pasopia 7 uses hardware dithering to simulate intermediate color intensities, based on a mix of two of eight base RGB colors displayed using the 640 x 200 resolution. This allows the machine to display a maximum of 27 colors (3-level RGB).[7]
The 8 base colors are displayed in bold.
Actual color limits depend on the graphic mode used:[7]
- Text mode: characters in 8 base colors, graphics in 4 colors (from 27);
- Fine graphics mode: Kanji characters in 8 base colors, graphics in 8 colors (from 27);
- Palette function: 8 or 4 colors (from 27) depending on the overlap of Kanji and graphics;
- Hardware tiling function: 27 colors can be displayed by combining 2 pixels, with 8 base colors available per pixel.
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See also
References
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