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What happens when I8008 CPU reads the "undefined" opcode (22h, 2Ah, 32h, 38h, 39h, 3Ah)? Are these opcodes evaluated as a NOP instruction, or lead to some side effects (RESET,...
Asked on 12/31/2020 by Martin Maly
0 answerI am trying to understand the trade-offs between scalar and vector machines, the threshold of complexity/transistor count/performance at which vector machines started to make sense. As data points, the Cray-1...
Asked on 12/27/2020 by rwallace
2 answerWhy can my PC not boot FAT larger than 2GB (FAT32) in legacy mode, but FAT16 and NTFS work fine? It just gives me a non-system disk error, while booting...
Asked on 12/26/2020 by Kevin Crans
1 answerThe Apollo Guidance Computer had its code stored in six modules that held 6 kwords of storage each, and the design of each module was such that changing even a...
Asked on 12/08/2020 by supercat
3 answerFor the Dragon 32 and the TRS-80 Color Computer I've found two documents describing how loading from cassette tape works:Dragon 32 doc, CoCo doc....
Asked on 12/08/2020
1 answerI have an old Sun Ultra workstation from early 2000s, running Solaris with an IDE called sparcworks. I'm trying to revive it (I have some numerical analysis libraries I want...
Asked on 12/07/2020 by Alastair
1 answerBack in 1984, I was commissioned to write some games for ZX-Spectrum. They were sold together. To my amazement I found that someone is selling a copy online. I thought...
Asked on 10/23/2020 by chasly - supports Monica
5 answerThe original CHIP-8 interpreter ran on RCA 1802-based kit computers and home computers, most notably on the COSMAC VIP. Some of the CHIP-8 opcodes are complicated and involve many memory...
Asked on 08/24/2020 by Cactus
3 answerYou know those block graphic symbols that allows you to draw lines, corners, intersections, fine bar charts, etc. they are useful and one can do a lot of stuff, but...
Asked on 08/20/2020 by Gunther Schadow
3 answerGet help from others!
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