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Post AxpRuwpv7AOlz8FNMe by [email protected] |
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Post #AxpRuvbhgXQsAkaVZA by [email protected] |
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@gilesgoat so, I'm assuming that I'll need an oscilloscope to check tha… |
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Post #AxpRuvinGB6UWjuAcK by [email protected] |
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@dev_ric For you Z80/6502 experiments, I'd say you need at least a 20Mhz ca… |
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Post #AxpRuvpWr8UWrd3Y7E by [email protected] |
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@dev_ric An oscilloscope is a VERY GOOD tool but mostly for ANALOG stuff, sure … |
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Post #AxpRuvvuTPazBQ2e3s by [email protected] |
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@dev_ric Apparently you can find some for 12 pounds ...https://www.amazon.co.uk… |
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Post #AxpRuw2e4Mz1WJC1Ym by [email protected] |
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@dev_ric Also "there are only 3 or 4 ways to 'make a digital clock'… |
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Post #AxpRuw9NfKN3rCLP3g by [email protected] |
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@gilesgoat ahhh D10 referring to the MHz might make sense. It's only an 8MH… |
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Post #AxpRuwG7GHl6C5UmYa by [email protected] |
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@gilesgoat I was originally expecting to do a 555 circuit for the clock but I&#… |
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Post #AxpRuwMqrF98WyeA3U by [email protected] |
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@dev_ric A 555 is NOT stable AT ALL for that purpose, I tried once to use a 555… |
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Post #AxpRuwSsUpy0pfSyRs by [email protected] |
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@gilesgoat people mostly seem to hook 32.768 crystals up to 4060 chips which do… |
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Post #AxpRuwYY9kVJ7G7VI0 by [email protected] |
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@dev_ric I think they start with 32.768 Khz because it's a standard easy to… |
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Post #AxpRuweDof2bOqm288 by [email protected] |
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@gilesgoat what are you doing for video out? Obviously the old schematics I'… |
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Post #AxpRuwjXUtIJfLGHQ0 by [email protected] |
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@dev_ric VIDEO .. OUT ??... MAN START SIMPLE !! An RS232 port connected to a te… |
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Post #AxpRuworB7Y1vpkWhs by [email protected] |
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@gilesgoat looks like digital analysers are exactly what I need, cheers. I'… |
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Post #AxpRuwpv7AOlz8FNMe by [email protected] |
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@gilesgoat haha, I'm no good at starting simple. When I jumped to web, I le… |
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Post #AxpRuwz8YtlsRiYjjM by [email protected] |
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@dev_ric The problem is not ( too hard ) about 'pushing the pixels out'… |
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Post #AxpRux4oDoJAjJDGZU by [email protected] |
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@gilesgoat ah, ref some a rambling post I did earlier today. I've seen the … |
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Post #AxpRuxBtnRyn5IWvce by [email protected] |
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@dev_ric You could use a double buffering scheme or you could try to use 't… |
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Post #AxpRuxIHPj5FP5W1ZI by [email protected] |
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@gilesgoat wait... So my thinking actually makes sense? π― |
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Post #AxpRuxOJ3Ju7hmKpxg by [email protected] |
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@dev_ric That VGA I built was 'minimalist' I used 2 old RAM Cache chips… |
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Post #AxpRuxQ4wjK1nHAFiy by [email protected] |
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@dev_ric Actually I found 2 pics of my OLD Z80 system :)U5 is the CPU, U4 is th… |
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Post #AxpRuxUgfb0a1ZJvuK by [email protected] |
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@dev_ric CONT. that was all "experimental" and my first ever attempt … |
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Post #AxpRuxaiJBpSKG8kIi by [email protected] |
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@dev_ric It's your/my lucky day, I found a pic of MY 320x200 Vga for my old… |
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Post #AxpRuxc8DuxmOensVk by [email protected] |
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@gilesgoat I quite like Sinclair's approach. They split into a monochrome p… |
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Post #AxpRuxi9rVmehLcgu8 by [email protected] |
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@dev_ric That was done for some specific HW limitations, has to do with the 411… |
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Post #AxpRuxpFR9SH3KwLxI by [email protected] |
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@gilesgoat 256 colours! π |
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Post #AxpRuxvd3QYjN7vRtw by [email protected] |
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@dev_ric It's MUCH easier to have a thing that 'every clock cycle withi… |
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Post #AxpRuy1IiL61eiZyk4 by [email protected] |
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@gilesgoat it is a tempting book, but I'm just not much good at learning fr… |
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Post #AxpRuy7KLvutxPOn8S by [email protected] |
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@gilesgoat Still haven't quite decided about the clock yet, by the way. I c… |
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Post #AxpRuyEluFs6KUsjjs by [email protected] |
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@gilesgoat wait, no. I'd need a 131.072 clock and a Q4 divide for that... A… |
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Post #AxpRuyKnXqgydBhY8G by [email protected] |
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@gilesgoat and that's way too big to then still get a 1Hz from π |
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Post #AxpRuyQpBRVqvsWMWe by [email protected] |
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@dev_ric Do you realize into "how much electrical shit" you get into … |
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Post #AxpRuyW8rflZCN0boW by [email protected] |
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@gilesgoat I know tolerance is a thing, and that the quality of boards and sold… |
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Post #AxpRuycWTws1W9zhlA by [email protected] |
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@dev_ric OK I throw you a challenge and a "limit". With the knowledge… |
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Post #AxpRuyiC8rPJnkeEbI by [email protected] |
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@dev_ric Alternatively 3 months to get just a display counting ( via SW running… |
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Post #AxpRuyovjonM8dnc6C by [email protected] |
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@gilesgoat ironically, inputs are something I've not looked at yet, at all.… |
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Post #AxpRuyw1JSSyUd7H9M by [email protected] |
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@dev_ric Also remember this "fundamental rule of electronics" .. in S… |
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Post #AxpRvFK0O39vJeSeky by [email protected] |
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@gilesgoat oh I just assumed IO devices would need to trigger an interrupt to f… |
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Post #AxpRvsz8v2EqKX0YnA by [email protected] |
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@dev_ric Why you make all MORE complex than it needs to be ? .. Interrupts are … |
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Post #AxpRvwlSrpfq3Gdh1k by [email protected] |
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@dev_ric "It'll be fine. π₯" .. NO IT WON'T if you ignore &… |
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Post #AxpRw0iQB5cGIzFJq4 by [email protected] |
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@dev_ric At higher frequencies, and I've been told 'you start like that… |
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Post #AxpRw45vc9CamlGdOa by [email protected] |
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@gilesgoat wiggly tracks for timing? Holy crap π¬I probably don't want to… |
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Post #AxpRxTjHn3NWa1LnJw by [email protected] |
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@gilesgoat I'm not sure mine is going to look this tidy π |
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Post #AxpRxTpJQeCOsiAbiK by [email protected] |
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@dev_ric I end up tonight with two pics .. ONE of those .. I DID "attached… |
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Post #AxpRxYSSD3sxFGVvHM by [email protected] |
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@gilesgoat these all look cool. I don't recognise any of the chips though, … |
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Post #AxpRxbnpm1lncRXXWK by [email protected] |
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@dev_ric "Tidy" .. ( as it normally is ) .. |
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Post #AxpRxeQtzkD1mBplh2 by [email protected] |
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@dev_ric Look in the box ( before I close it ) ... |
