http://www.embeddedinsights.com/channels/2011/04/13/is-bigger-and-better-always-better/ Shedding Light on the Hidden World of Embedded Systems Mon, 28 Jul 2014 16:18:37 -0400 hourly 1 http://wordpress.org/?v=3.0 http://www.embeddedinsights.com/channels/2011/04/13/is-bigger-and-better-always-better/#comment-6214 Jon Titus Thu, 14 Apr 2011 15:29:53 +0000 http://www.embeddedinsights.com/channels/?p=523#comment-6214 Years ago many embedded systems and early home computers used the Intel 8-bit 8080 microprocessor. Then Zilog introduced the Z80, essentially an 8080 clone but easier to use because it reduced the number of support components such as a clock driver, extra power supply, etc. Unfortunately, some software crashed, even though the Z80 had the same instruction set, registers, and so on. It turned out that a flag in the Z80 behaved differently than the equivalent flag in an 8080. As I recall, the offending software used the flag in an unusual way and the Zilog Z80 didn't duplicate that action. Someone came up with a work-around, but it caused a lot of recompiling, which was a pain 35 years ago. This 8080-Z80-compatibility problem remains with us. Visit: http://fixunix.com/cp-m/252349-z80-8080-tester-program.html. --Jon Years ago many embedded systems and early home computers used the Intel 8-bit 8080 microprocessor. Then Zilog introduced the Z80, essentially an 8080 clone but easier to use because it reduced the number of support components such as a clock driver, extra power supply, etc. Unfortunately, some software crashed, even though the Z80 had the same instruction set, registers, and so on. It turned out that a flag in the Z80 behaved differently than the equivalent flag in an 8080. As I recall, the offending software used the flag in an unusual way and the Zilog Z80 didn’t duplicate that action. Someone came up with a work-around, but it caused a lot of recompiling, which was a pain 35 years ago. This 8080-Z80-compatibility problem remains with us. Visit: http://fixunix.com/cp-m/252349-z80-8080-tester-program.html. –Jon

]]> http://www.embeddedinsights.com/channels/2011/04/13/is-bigger-and-better-always-better/#comment-6205 C.R. @ LI Thu, 14 Apr 2011 01:09:37 +0000 http://www.embeddedinsights.com/channels/?p=523#comment-6205 But it did make for a cool video to see that little(r) plane do a 90 degree spin: http://www.youtube.com/watch?v=2StZVDUck9M "Some of you belongs may have shifted during the flight" But it did make for a cool video to see that little(r) plane do a 90 degree spin:
http://www.youtube.com/watch?v=2StZVDUck9M
“Some of you belongs may have shifted during the flight”

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