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- MOS_Technology_6551 abstract "The 6551 Asynchronous Communications Interface Adapter (ACIA) was an integrated circuit made by MOS Technology. It served as a companion UART chip for the widely popular 6502 microprocessor. Intended to implement RS-232, its specifications called for a maximum speed of 19,200 bits per second. It was used in the Commodore PET, Commodore Plus/4, Apple Computer's Super Serial Card for the Apple II family, and possibly other lesser-known computers.Commodore International omitted the 6551 from the popular VIC-20, C64, and C128 home computers. Instead, these systems implemented a bit-banging UART via KERNAL routines. This RS-232 implementation was not reliable over 1200 bit/s (see errata comments in the 6526 article), forcing some programmers of terminal programs to write carefully calibrated custom serial routines. The popular terminal program NovaTerm was able to achieve 4800 bit/s on the C64, and DesTerm achieved 9600 bit/s on the C128. Several other terminal programs achieved 2400 bit/s. Novaterm 9.6 on a Commodore 64 or 128, can achieve a maximum rate of 9600 bit/s on the user port, using an EZ-232 interface, designed by Jim Brain.Several companies, including Dr. Evil Labs and Creative Micro Designs, marketed an add-on cartridge containing a 6551 and an industry-standard RS-232 port to allow the C64 and 128 to use high-speed modems from companies such as U.S. Robotics and Hayes Communications. The Dr. Evil and CMD cartridges pushed the 6551 to a maximum speed of 38,400, and with a faster-still clock crystal, some end users reported getting 115,200 bit/s out of the chip. The ADTPro file transfer program turns off the baud rate generator in the 6551 allowing 115,200 bit/s transfers with an unmodified clock crystal.".
- MOS_Technology_6551 wikiPageExternalLink mos_6551_acia.pdf.
- MOS_Technology_6551 wikiPageID "1210658".
- MOS_Technology_6551 wikiPageLength "2330".
- MOS_Technology_6551 wikiPageOutDegree "33".
- MOS_Technology_6551 wikiPageRevisionID "680072005".
- MOS_Technology_6551 wikiPageWikiLink ADTPro.
- MOS_Technology_6551 wikiPageWikiLink Apple_II_serial_cards.
- MOS_Technology_6551 wikiPageWikiLink Apple_II_series.
- MOS_Technology_6551 wikiPageWikiLink Apple_Inc..
- MOS_Technology_6551 wikiPageWikiLink Bit_banging.
- MOS_Technology_6551 wikiPageWikiLink CMOS.
- MOS_Technology_6551 wikiPageWikiLink O_Chips.
- MOS_Technology_6551 wikiPageWikiLink Category:MOS_Integrated_Circuits.
- MOS_Technology_6551 wikiPageWikiLink Commodore_128.
- MOS_Technology_6551 wikiPageWikiLink Commodore_64.
- MOS_Technology_6551 wikiPageWikiLink Commodore_International.
- MOS_Technology_6551 wikiPageWikiLink Commodore_PET.
- MOS_Technology_6551 wikiPageWikiLink 4.
- MOS_Technology_6551 wikiPageWikiLink Commodore_VIC-20.
- MOS_Technology_6551 wikiPageWikiLink Conexant.
- MOS_Technology_6551 wikiPageWikiLink Creative_Micro_Designs.
- MOS_Technology_6551 wikiPageWikiLink Data_rate_units.
- MOS_Technology_6551 wikiPageWikiLink Dr._Evil_Labs.
- MOS_Technology_6551 wikiPageWikiLink Hayes_Microcomputer_Products.
- MOS_Technology_6551 wikiPageWikiLink Home_computer.
- MOS_Technology_6551 wikiPageWikiLink Integrated_circuit.
- MOS_Technology_6551 wikiPageWikiLink KERNAL.
- MOS_Technology_6551 wikiPageWikiLink MIDI.
- MOS_Technology_6551 wikiPageWikiLink MOS_Technology.
- MOS_Technology_6551 wikiPageWikiLink MOS_Technology_6502.
- MOS_Technology_6551 wikiPageWikiLink MOS_Technology_CIA.
- MOS_Technology_6551 wikiPageWikiLink Microprocessor.
- MOS_Technology_6551 wikiPageWikiLink Motorola_6800.
- MOS_Technology_6551 wikiPageWikiLink ROM_cartridge.
- MOS_Technology_6551 wikiPageWikiLink RS-232.
- MOS_Technology_6551 wikiPageWikiLink Terminal_emulator.
- MOS_Technology_6551 wikiPageWikiLink USRobotics.
- MOS_Technology_6551 wikiPageWikiLink transmitter.
- MOS_Technology_6551 wikiPageWikiLinkText "6551".
- MOS_Technology_6551 wikiPageWikiLinkText "ACIA".
- MOS_Technology_6551 wikiPageWikiLinkText "MOS Technology 6551 ACIA chip".
- MOS_Technology_6551 wikiPageWikiLinkText "MOS Technology 6551".
- MOS_Technology_6551 wikiPageWikiLinkText "MOS Technology 6551#Variants".
- MOS_Technology_6551 wikiPageWikiLinkText "the 6551 chip".
- MOS_Technology_6551 wikiPageUsesTemplate Template:MOS_Interface.
- MOS_Technology_6551 subject O_Chips.
- MOS_Technology_6551 subject Category:MOS_Integrated_Circuits.
- MOS_Technology_6551 hypernym Circuit.
- MOS_Technology_6551 type BaseballLeague.
- MOS_Technology_6551 type Circuit.
- MOS_Technology_6551 type Product.
- MOS_Technology_6551 comment "The 6551 Asynchronous Communications Interface Adapter (ACIA) was an integrated circuit made by MOS Technology. It served as a companion UART chip for the widely popular 6502 microprocessor. Intended to implement RS-232, its specifications called for a maximum speed of 19,200 bits per second.".
- MOS_Technology_6551 label "MOS Technology 6551".
- MOS_Technology_6551 sameAs Q1881692.
- MOS_Technology_6551 sameAs MOS_Technology_6551.
- MOS_Technology_6551 sameAs m.04hl3y.
- MOS_Technology_6551 sameAs Q1881692.
- MOS_Technology_6551 wasDerivedFrom MOS_Technology_6551?oldid=680072005.
- MOS_Technology_6551 isPrimaryTopicOf MOS_Technology_6551.