VIC-20

(computer)A home computer made by Commodore with a 6502CPU, similar in style to the Commodore 64 and Commodore C16. The VIC-20 was released before the C64, and after theCommodore PET(?). It was intended to be more of a low-endhome computer than the PET.

The VIC-20 had connectors for game cartridges and a tape drive (compatible with a C64). It came with five kilobytesof RAM, but 1.5 KB were used by the system for variousthings, like the video display (which had an unusual 22x20char/line screen layout), and other dynamic aspects of theoperating system (such as it was). The RAM was expandablewith a plug-in cartridge which used the same expansion port asgames. Port expander boxes were available to allow more thanone cartridge to be connected at a time.

RAM cartridges were available in several sizes: 3K, 8K, 16Kand 32K. The internal memory map was re-organised with theaddition of each size cartridge, leading to the situation thatsome programs would only work if the right amount of memorywas available. The 32K cartridges were all third-party andhad switches to allow the RAM to be enabled in sections sothat any expansion size could be achieved.

BASIC programs could use at most 24 KB of RAM. Any extraoccupied the location usually used by ROM cartridges(i.e. games). This allowed people to copy ROM cartridges totape and distribute them to their friends, who could load thetape into the top 8k of their 32k RAM packs.

The name "VIC" came from the Video Interface Chip that wasalso used in the other, later, Commodore 8-bit computers.

VIC-20

(Video Interface Chip-20) An early personal computer from Commodore Business Machines. Introduced in 1980 and following the Commodore PET, the VIC-20 had 5KB of RAM, used tape cassette storage and displayed 22 text characters per line on a standard TV. With a price tag of USD $300, it was the best-selling personal computer in 1982 and the first computer to achieve sales of one million units. Its successor, the Commodore 64, looked just like the VIC-20, except it was beige instead of white. See Commodore 64.

单词	vic-20
释义	VIC-20 VIC-20 (computer)A home computer made by Commodore with a 6502CPU, similar in style to the Commodore 64 and Commodore C16. The VIC-20 was released before the C64, and after theCommodore PET(?). It was intended to be more of a low-endhome computer than the PET. The VIC-20 had connectors for game cartridges and a tape drive (compatible with a C64). It came with five kilobytesof RAM, but 1.5 KB were used by the system for variousthings, like the video display (which had an unusual 22x20char/line screen layout), and other dynamic aspects of theoperating system (such as it was). The RAM was expandablewith a plug-in cartridge which used the same expansion port asgames. Port expander boxes were available to allow more thanone cartridge to be connected at a time. RAM cartridges were available in several sizes: 3K, 8K, 16Kand 32K. The internal memory map was re-organised with theaddition of each size cartridge, leading to the situation thatsome programs would only work if the right amount of memorywas available. The 32K cartridges were all third-party andhad switches to allow the RAM to be enabled in sections sothat any expansion size could be achieved. BASIC programs could use at most 24 KB of RAM. Any extraoccupied the location usually used by ROM cartridges(i.e. games). This allowed people to copy ROM cartridges totape and distribute them to their friends, who could load thetape into the top 8k of their 32k RAM packs. The name "VIC" came from the Video Interface Chip that wasalso used in the other, later, Commodore 8-bit computers. VIC-20 (Video Interface Chip-20) An early personal computer from Commodore Business Machines. Introduced in 1980 and following the Commodore PET, the VIC-20 had 5KB of RAM, used tape cassette storage and displayed 22 text characters per line on a standard TV. With a price tag of USD $300, it was the best-selling personal computer in 1982 and the first computer to achieve sales of one million units. Its successor, the Commodore 64, looked just like the VIC-20, except it was beige instead of white. See Commodore 64.
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