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Title says it all really. Some documentation claims that the S and Z flags are affected by both TXS and TSX, just as with all other transfer...
Asked on 11/12/2021
1 answerI'm trying to learn about C64 interrupt handling (with the goal of putting it in practice). My understanding is that interrupts can be triggered by different sources but there is...
Asked on 11/12/2021
2 answerPoking about in early issues of Dr Dobbs' Journal (the journal of the People's Computer Company, or PCC) I came across a listing for BASIC games available on...
Asked on 11/10/2021
4 answerOne of the original Sinclair peripherals for the ZX Spectrum was the Interface 2 which provided joystick ports and also a slot for ROM cartridges:...
Asked on 11/07/2021
1 answerThe term User for computer hardware and software customers has been universal for as long as I can remember. It has always applied to both hardware and software customers -...
Asked on 08/25/2021 by Brian H
19 answerThe claim that programs stored dates as two ASCII or similar characters because computers were limited in resources seems wrong to me because it takes more memory than one 8-bit...
Asked on 08/25/2021 by Mr. Chem Question
14 answerIn 1997, my uncle visited and gave me a "fax modem" which he installed on our 486 PC and then managed to transfer over a fax document from a real...
Asked on 08/25/2021 by B. Yath
7 answerBBC Micro model B has 32k memory. An average book, like Mary Shelley's Frankenstein, has about 350,000 characters in it. So you'd need over 10 times the memory to load...
Asked on 08/25/2021 by NibblyPig
11 answerThe DenOfGeek article [Brew2013] has screen captures from the movie Superman III, in particular the early scenes in the movie where character Gus Gorman is at computer...
Asked on 08/25/2021 by JdeBP
4 answerIn an answer to Why did IBM System 360 have byte addressable RAM I wrote regarding the choice of byte size:7 bits would be a perfect match for ASCII,...
Asked on 08/25/2021
7 answerGet help from others!
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