Timeline for Thinking through the design of a TTL video card: what memory chips and how to manage memory? [closed]
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| May 12, 2020 at 19:37 | comment | added | occipita | Suggest you look at the design of the Nascom range of computers, which had video generation done in a pretty similar way (albeit text mode only, not high res graphics) . There was an article describing the system in detail in Practical Electronics which is available from one of the sites dedicated to the machines. | |
| May 12, 2020 at 16:45 | comment | added | Gunther Schadow | There is a similar question here: retrocomputing.stackexchange.com/questions/12532/… which if the asker had done more work and show it would have become quite far ranging too. This shows the topic is relevant. And shutting down topics is the most irrelevant and useless action one can take. | |
| May 12, 2020 at 16:44 | comment | added | Gunther Schadow | Again, all this talk about "this is not a good place for open ended questions" or "go to another forum" and then finding out that "we do sort of have a blog but it's really inactive" -- all that I find pointless nit-pickery. My question is (a) relevant and (b) shows a significant amount of work and is not lazy. For that I get penalized and a good opportunity for interested people exchanging knowledge gets wasted because uninterested people decide they shut down a topic that they don't find interesting enough to engage in. | |
| May 12, 2020 at 16:07 | comment | added | Gunther Schadow | Also, what is wrong for me to mention 6502 and VAX 11/780 in the same thought? Isn't this a retrocomputing site? Aren't both platforms very much retro? Again, if you feel bewildered there is nothing that stops you from moving on. If you, like me, owned both a C64 and a VAX11/780 then you might appreciate thinking both at the same time. | |
| May 12, 2020 at 16:05 | comment | added | Gunther Schadow | At the risk of getting banned by hyper-zealot micro-managers I will officially file a grievance under these actions to shut down topics. I never get the point of that. I could have asked "How does it work?" and leave all the work to others, or I can think it through aloud and allow those who care to respond and those who do not care to move on. Yet somehow those who don't care feel the urge to downvote and close topics, why? Actually I don't want to know why, and I don't want to go to other forums. This is a perfectly fine forum to pick the brains of people who have experience and care. | |
| May 12, 2020 at 15:03 | comment | added | wizzwizz4♦ | @hippietrail We do sort of have a blog, but it's really inactive. The state of blogging has advanced significantly since it was set up; if I were launching it again, I doubt it'd even be a WordPress site. Nonetheless, it's still accepting posts, if anybody wants to put something on it. | |
| May 12, 2020 at 10:01 | comment | added | Raffzahn | @hippietrail Well, wouldn't it work the same way one goes ahead to design the system without RC.SE? Like first drawing up the basic constrains, turning them into parts and then solving each - and if that generates questions that can not be solved by peeping into a data sheet or manual, then ask someone? Asking 'how do I design a computer' does not really fit here. Heck, he asks about a video card (something stand alone) but then adds musing about CPU clock without mentioning the CPU to be used (there is one mentioning of a 6502 in a sentence about the VIC-II, but so is the VAX later on). | |
| May 12, 2020 at 9:48 | history | closed |
hippietrail Jim Nelson dirkt Stephen Kitt Raffzahn |
Needs more focus | |
| May 12, 2020 at 5:44 | comment | added | snips-n-snails | @hippietrail yes: retrobrewcomputers.org/forum | |
| May 12, 2020 at 4:41 | review | Close votes | |||
| May 12, 2020 at 9:51 | |||||
| May 12, 2020 at 1:27 | comment | added | hippietrail | This question reminds me of my own questions I have about designing a homebrew retro computer with a Z80 and a 6502, because I also wouldn't know how to break it down into questions that fit the SE format either. I wonder if there is a good forum for such ponderous questions? | |
| May 12, 2020 at 1:17 | history | edited | hippietrail | CC BY-SA 4.0 |
wikilink acronyms/abbreviations I had to look up the meaning of
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| May 12, 2020 at 1:12 | comment | added | hippietrail | @Raffzahn: Does this SE have a blog? I know SE offers them as we used to talk about starting ours at travel.SE but never did. | |
| May 12, 2020 at 0:53 | comment | added | Wayne Conrad | Although this is not a good question for this format, it is a really interesting project and I hope you blog it or post it in an appropriate venue. | |
| May 11, 2020 at 23:53 | comment | added | Raffzahn | Agreed. This is way past a useful question, more like a blog entry, or some starter for a Reddit thread. RC.SE is not for discussions. Please scale this down to a set of separate questions aiming for a tangible answers, each within a single area. Beside that, as mcleod_ideafix already mentioned, theAnswer to most part is simply SRAM. A 256 KiByte 55ns RAM is about 2 Euro; 512 KiB 45 ns @5 Euro; 1 MiByte, 45 ns @ <10 Euro. All @ 5V. So just use it. | |
| May 11, 2020 at 23:27 | comment | added | mcleod_ideafix | This is way too much to read for a simple question with a simple answer: SRAM. They are fast and easy to manage. If you don't need megabytes of it, the cost is also reasonable. | |
| May 11, 2020 at 23:13 | history | asked | Gunther Schadow | CC BY-SA 4.0 |