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ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... , the ULA is responsible for generating the RAS and CAS when the Z80 wants to access the lower ... on the bus, the ULA generates an extra RAS and corrupts the address it has given to the ... -
ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... and Z80 RAS/CAS interaction that causes it is subtly different the to ULA and Z80 RAS ... /CAS interaction in the Spectrum. This is down to the SCLD producing RAS ... -
The new C5?[url]http://www.foxnews.com/story/0,2933,308636,00.html[/url]
... is still going - I think Segway survive on the principle of making ... few sales at a very high price ... . This is probably the only way to survive as ... spike is put in the centre of the steering wheel instead! Apparently ... -
Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…
... approximately >5ms gap in the /RAS line to the 4116 memory. If I ... not get refreshed between the ULA finishing with the paper area and starting ... on the paper area of the next frame. The Z80 ... -
How would you fix a camera to a bike!Every day I cycle to drop off my youngest son to nursery school, then pick him up again, about 5 mile round trip. I've had a few close calls nearly g…
... he was going. The driver of the stationary car was trying to do what ... of riding with the very high colour temperature of the LED front light ... high. At night, it seems like 75% of drivers move completely to the ... -
The terrorists have wonWhen a man collapses in a diabetic coma, instead of the bus driver assuming the man is ill, but assumes he's a terrorist (and gets the police in who …
... a police presence in a high crime area is not giving ... ]
Therein lies the problem. Going back to Hayek, his argument was ... laid-out in his influential "The Road to Serfdom"). I don't ... these cases it's the authorities reacting to a situation and (often ... -
Battle of the Isometric gamesYes, it is another poll. But I think this one will produce quite an interesting debate. I never really got into these games back in the day but sinc…
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I'm going to revisit Quazatron after HoH. The popularity of this ... it is pretty much the key to enjoying the game and winning. Try ... picking on robots that have a high ... number (7 or above) to start with and ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... decode the full port address. With bus indirect mode I'm going to need ... space in the Spectrum ROM starts. The CPLD will trap the Z80 executing (i ... seen the CPU try to execute the first instruction (then set A15 high to stop ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
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The idea to move the CLS to after the shuffling improved the game a ... in the one-liner limits. Even then, we are still going to have to ... sure on the point of whether all aces have to be high or ... low, or whether one ace can be high ... -
Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…
... decoding going on at all. Check all the traces to the '138 to start ... with. Also put the M1 jumper ... the Flash position. This will verify that ROMCS is being held high ... and the flash is getting paged ... -
Benchmark timeWell, the BASIC benchmark posted in Creative Computing back in the 80s came up as a topic on the AtariAge forums. The article is available online an…
... lot of int to floating point operations being generated; I could have ... going to be the accuracy of the library as the size of the mantissa contributes exponentially to ... more impact -- the engineers chose to extend the length of z80 instructions to multiples of ... -
Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…
... , i have a problem with the high memory of a 4B issue ... wrong here? Do i need to do something more when replacing ... .
Maybe one of the 74ls157 ( IC25 / IC 26) or 74LS00 ... -
Cross Platform DevelopmentWhat's the best way to develop cross platform apps? By best, the only limiting criteria would be "at no cost" :)
... is pretty much the only choice for high level language in my ... in hand-optimized assembler. On the z80, C programs are always larger ... small uP are designed with high level languages in mind so ... easy to spot what is going on and guess at the variable names ... -
It's a trap!So I got a CPLD (not the eventual one I want to use for the ethernet project - rather, one I actually have here and now, an XC9536 in a PLCC44). And…
... the PCB. The CPLD itself isn't expensive - the XC9572 that I intend to ... trapper, memory pager etc.). The software to program it is free, ... kind of ULA. Fortunately, today's equivalent of the ULA (the CPLD) is ... 4mm pin pitch aren't going to be shied off from ... -
Fairytale of New York - edited[url]http://news.bbc.co.uk/1/hi/entertainment/7149525.stm[/url] I actually dont mind this 'Xmas' song at all. I cant believe the PC brigade have go…
... it was converted to the N64. Nintendo objected to the adult bookstore in level ... (he said) his mum was going to buy it for him but ... in authority seems to be in a hurry to address these issues.
High".
The verse is:
It's a trap!So I got a CPLD (not the eventual one I want to use for the ethernet project - rather, one I actually have here and now, an XC9536 in a PLCC44). And…
... its outputs will go to high impedance the instant that RD+MREQ get ... on the rising edge of the 3.5 MHz system clock (the Z80 deasserts ... to be what was on the data bus when the Z80 was also reading the ... now, since there's also the data bus going to the CPLD.another c64 vs. Speccy site...[url]http://c64vsspectrum.com/[/url] 25 years and we are still brawling.. ;)
... eg 256 bytes represent a column - hence no segmentation, and ... have to generate both RAS and CAS for the memory, read the ... absolute bear - with the ULA needing to access RAM eight times ... to access lower RAM while the scanline was in the paper area. A Z80 ...A serious question (in case you think it's facetious)Alright, so none of us can tell the future, and equally no one knows for definate what oil/gas etc reserves are left and where, but I was talking to …
... which makes it difficult to gain the will to fix the problem.
... The high cost of oil at the moment is partially due to ... /> ... and this makes the problem extremely hard to address.
... the next 700M to 1Bn years right really is just going to ...i am currently listening to........as i couldnt seem to find the old one, i didnt look that hard :P ive started a new one right after somebody asked me for some slayer ive rediscovere…
... 70's album. The riff on the title track is ... with us college going kids then high on spirits, dreaming ... The Doors were to follow soon after to really let loose the ... "Highway Star" at the top of their voice ... in the middle of the night for no ...i am currently listening to........as i couldnt seem to find the old one, i didnt look that hard :P ive started a new one right after somebody asked me for some slayer ive rediscovere…
... well with us college going kids then high on spirits, dreaming a ... and The Doors were to follow soon after to really let loose the demons ... of their voice in the middle of the night for no other ... beatles songs we sang!) Listen to the album 'Deep purple in rock ...Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]
... .3v LDO regulator on the board to start with. The Z80 and all its ... struggles to drive the relatively high capacitative loads on the Spectrum's bus. The ground ... value. However, going from high-Z state to all logic high means the already power ...For you tommy zee war is overFor my birthday my GF got me a collection of commando comics, well its a book with 12 of them in. 'die, you bosch swine' 'gott in himmel' did anyo…
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It started with a high-ranking RAF officer who is ... a bully. After that it switches to Germany, where a Nazi ... almost identical in appearance. Eventually the squad escape, but their ... coming) the one actually executed is the German, due to a deliberate ...Sega Outrun.Just been playing Sega Outrun on MAME32. What a fantastic game, looks great on my 19" monitor. T Has anyone completed it? I have been trying and get…
... a left at the next, then keep going right. However, ... the rev counter goes into the red to avoid wheelspin; do the same at the ... star - keep the revs in the ... Quickly shift from high to low before going off road. Then ...Game EditorsWell as the title says, this is a query about game editors, specifically the ones for Gremlin games... Many moons ago, Your Sinclair published (I th…
... never going to be generated under emulation, and that's all down to the way ... in which the ... I think that's down to the IF1 emulation.
This patch ...Z88DK fun and gamesHi, I was wondering if anyone here uses Z88DK with TommyGun and knew about how to link the two together (e.g. how do I use a screen, sprite or map e…
... you may want to look into some z80 compression utilities.
the code generated is "ld hl,_screen0" which is collecting the memory address of the ... someplace else that is going to be used below so ... attached to them by the C compiler so any z80 code interacting ...Well it's the end for Britain by the looks of things!!![url=http://www.thisislondon.co.uk/news/article-23436203-details/Adoption+of+Islamic+Sharia+law+in+Britain+is+'unavoidable'%2C+says+Archbishop+of+Can…
... and themselves, to serve as slaves to mine Gold to repair the atmosphere of ... was near the end, and so the whole family was going to go on ... Hitler? Look at the fever they generated, and the loyalty of some of ...sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... My opinion
The Jumpers: CAS/RAS from 3720/4532 chip ... need a little delay. The jumper ... you don't need to change the ram jumpers. The old 3720 / 4532 ... bank. The ram jumper allow to select low bank ( 4532 L ) or high bank ...What is the deep philosophical meaning behind your avatar?>waits for mile to post< I can't figure mine out, I'm not stupid enough.
... 's prolly going bald in the back of the head also. The micturator should ... stop eating/drinking things with high ... acidic content and the skin-conditions will ...What is the deep philosophical meaning behind your avatar?>waits for mile to post< I can't figure mine out, I'm not stupid enough.
... 's prolly going bald in the back of the head also. The micturator should ... eating/drinking things with high acidic content and the skin-conditions will ... specs on the black finish occasionally, so it has to be cleaned ...Blue Ray vs. HD DVDBlue Ray vs. HD DVD Which is better, and why? And which will survive the other? Personally, I don't much care at the moment, as my TV is not high…
... noticed a trend that is going on here?
... threat since it could devalue the product.
... it would effectively devalue the product, compared to selling each film ... surprised to learn that the next-next generation of ultra high definition ...
