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Posts by [email protected] |
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Post #AvUvk7jpNfGvxADI2a by [email protected] |
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Bit 7 of GPIO register Port A can be mapped to timer channel 14's output, i… |
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Post #AvUvk7quxIwYJ9Wx5k by [email protected] |
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But we want a square wave. Luckily, there's a feature for that using the ti… |
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Post #AvUvk7xIZa30cwW32O by [email protected] |
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A divisor of 12 (10Mhz) and a period of 2 (for two clock edges) gives us pretty… |
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Post #AvUvk8KLBuTlmPIRxA by [email protected] |
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There's just one little problem. The 8086 and 8087 specify a 33% duty cycle… |
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Post #AvUvk8iRkHlGzAZhWi by [email protected] |
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But look at the other modes available in the datasheet - PWM mode 1 looks inter… |
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Post #AvUvk97yDOB6GKW5JI by [email protected] |
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Now we have our square wave with the appropriate 33% duty cycle. Messing aroun… |
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Post #AvUvk9X8hoJLWOIBXc by [email protected] |
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Maybe... a capacitor might help? Capacitors are magic right? |
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Post #AvUvk9wfAujAnYEZKC by [email protected] |
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Anyway, if the 8086 & 8087 are running at full speed what's the plan fo… |
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Post #AvUvkALpfKrQ3c0fYW by [email protected] |
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The READY line prevents the 8086 and 8087 from completing bus transfers. If RE… |
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Post #AvUvkAjaF1rLFH7dZo by [email protected] |
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Then in our main program loop, we can read the bus signals from the 8288. If th… |
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Post #AvUvkBAWcrPUapj9ZQ by [email protected] |
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The only trick is that we have to very quickly reset READY low again or we may … |
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Post #AvUvkBa35xpJrzfXM0 by [email protected] |
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The worst case scenario here are back to back bus transfers - a clock cycle at … |
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Post #AvUvkByrbhfz6xHM24 by [email protected] |
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Here's a gist of the code that sets up the timer on the Arduino Giga.I swit… |
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Post #AvUvkUF7hzNTkb1asK by [email protected] |
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@krono Ben's a legend! |
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Post #AvVSyHi8OcqfQNmVlo by [email protected] |
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I saw this weird thing on eBay today. It's a Maynard "Surprise!" … |
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Post #AvVT1fGPHfRnLCQKhs by [email protected] |
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#retrocomputing No, it comes with an 8088 socket adapter that has a god damn sl… |
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Post #AvVT45RwtZo78QyfWS by [email protected] |
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#retrocomputing What are the chips for?? you can just put a V20 in the socket d… |
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Post #AvVTRYnXwecQolGxgu by [email protected] |
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#retrocomputing ok so here's the manual https://minuszerodegrees.net/manual… |
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Post #AvVTVLkqNn5dWQocbY by [email protected] |
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#retrocomputing i still deem it incredibly cursed |
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Post #AvbDfVI5LjmZfwwXfU by [email protected] |
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The 286 is significantly different from its predecessor the 8086 in several way… |
