Z-80 SoftCard (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Z-80 SoftCard" in English language version.

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apple2.org.za

Lock, Robert (May–June 1980). "An Apple Breakthru". Compute!. No. 4. Small Systems Services. p. 6. ISSN 0194-357X. OCLC 637460999. Retrieved October 25, 2013.
Freiberger, Paul; Swaine, Michael (2000). Fire in the Valley: The Making of the Personal Computer. New York, NY: McGraw-Hill. p. 329. ISBN 0-07-135892-7. They brought in Tim Paterson of Seattle Computer Products, located across Lake Washington, to try to build a card for the Apple that would let it run Microsoft's 8080 and Z80 software. They called it the SoftCard. Paterson did a series of prototypes before Don Burdis took over the project.
Pelczarski, Mark (November 1981). "Microsoft Softcard". BYTE. pp. 152–162. Retrieved October 19, 2013.
Markoff, John (May 1984). "The Apple IIc Personal Computer". BYTE. p. 282. Retrieved October 23, 2013.
Wheelwright, Geof (June 16, 1984). "Golden Opportunity". Personal Computer News. pp. 23–24. Retrieved March 3, 2023.

Hogan, Thom (March 3, 1981). "Microsoft's Z80 SoftCard". InfoWorld. 3 (4). Popular Computing: 20–21. ISSN 0199-6649.
"Z-80 Board Puts CP/M on Apple". InfoWorld. 2 (6). Popular Computing: 3. April 28, 1980. ISSN 0199-6649.
Raburn, Vern (October 20, 1980). "Letters: Developed by Microsoft". Computerworld. 14 (43): 37. ISSN 0010-4841. It was one of the founders of Microsoft, Paul Allen, who hit upon the idea of putting a Z80 processor into the Apple.
"Seminar Spills Negotiating Secrets". InfoWorld. 2 (21). Popular Computing: 24. November 24, 1980. ISSN 0199-6649. Unsure of the demand for the product, Microsoft took a prototype to the last West Coast Computer Faire
Petersen, Marty (February 6, 1984). "Premium Softcard IIe". InfoWorld. pp. 64, 66. Retrieved January 25, 2015.
Bunnell, David (February–March 1982). "The Man Behind The Machine? / A PC Exclusive Interview With Software Guru Bill Gates". PC Magazine. p. 16. Retrieved February 17, 2012.

Ballmer, Steve. "Microsoft Surface Keynote". YouTube. Archived from the original on December 19, 2021. Retrieved June 19, 2012.

Lock, Robert (May–June 1980). "An Apple Breakthru". Compute!. No. 4. Small Systems Services. p. 6. ISSN 0194-357X. OCLC 637460999. Retrieved October 25, 2013.
Hogan, Thom (March 3, 1981). "Microsoft's Z80 SoftCard". InfoWorld. 3 (4). Popular Computing: 20–21. ISSN 0199-6649.
"Z-80 Board Puts CP/M on Apple". InfoWorld. 2 (6). Popular Computing: 3. April 28, 1980. ISSN 0199-6649.
Raburn, Vern (October 20, 1980). "Letters: Developed by Microsoft". Computerworld. 14 (43): 37. ISSN 0010-4841. It was one of the founders of Microsoft, Paul Allen, who hit upon the idea of putting a Z80 processor into the Apple.
"Seminar Spills Negotiating Secrets". InfoWorld. 2 (21). Popular Computing: 24. November 24, 1980. ISSN 0199-6649. Unsure of the demand for the product, Microsoft took a prototype to the last West Coast Computer Faire

Ballmer, Steve. "Microsoft Surface Keynote". YouTube. Archived from the original on December 19, 2021. Retrieved June 19, 2012.