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HandWiki. VDM-1. Encyclopedia. Available online: https://encyclopedia.pub/entry/28474 (accessed on 10 October 2026).
HandWiki. VDM-1. Encyclopedia. Available at: https://encyclopedia.pub/entry/28474. Accessed October 10, 2026.
HandWiki. "VDM-1" Encyclopedia, https://encyclopedia.pub/entry/28474 (accessed October 10, 2026).
HandWiki. (2022, October 08). VDM-1. In Encyclopedia. https://encyclopedia.pub/entry/28474
HandWiki. "VDM-1." Encyclopedia. Web. 08 October, 2022.
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The Processor Technology VDM-1, for Video Display Module, was the first video card for S-100 bus computers. Created in 1975, it allows an S-100 machine to produce its own display, and when paired with a keyboard and their 3P+S card, it eliminates the need for a separate video terminal. Using a 7 x 9 dot matrix and ASCII characters, it produces a 64-column by 16-row text display. The VDM-1 is a complex card and was soon replaced by an increasing number of similar products from other companies. An early competitor was the Solid State Music VB-1, which offers an identical display from a much simpler card. Later cards using LSI chips have enough room to include the keyboard controller as well.
vdm-1
lsi
s-100
References
- Lancaster, Don (September 1973). "TV Typewriter". Radio Electronics (New York: Gernsback Publications) 44 (9): 43–52.
- Social.
- Manual 1976.
- wiktionary:convivial
- Felsenstein, Lee (1974). "Tom Swift Lives!". People's Computer Company: 14–15. http://www.leefelsenstein.com/wp-content/uploads/2013/02/Felsenstein-Tabloid-BW.pdf.
- Levy 2010, p. 201.
- Today this concept is implemented using dual-ported RAM.
- Levy 2010, p. 202.
- Anderson 1976, p. 36.
- Solomon, Les (1984). "Solomon's Memory". in Ditlea, Steve. Digital Deli. https://www.atariarchives.org/deli/solomons_memory.php.
- Levy 2010, pp. 202, 203.
- History 2008, p. 18.
- History 2008, p. 20.
- History 2008, p. 21.
- See image here. http://www.s100computers.com/Hardware%20Folder/Processor%20Technology/VDM-1/VDM-1.htm
- Manual 1976, p. I-1.
- Anderson 1976, p. 37.
- Anderson 1976, p. 38.
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