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Game BackupOk will try and discribe best I can Hardware ZX Spectrum 48k x2, Interface 2, Kempston progamable interface ZX Spectrum +3 [U]Hunting for a interf…
... the other hand, the Timex TC2048 is the best of the ... -
Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…
... to fix as the Timex TC2048 doesn't appear to have ... -
Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…
... to fix as the Timex TC2048 doesn't appear to have ... -
Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …
... 30]
For the contended RAM (which shares time between ... /> allowed only 1 access to contended RAM in every 8 T ... -
worth buying a zx spectrumAs i have been watching Micro Men i have been really thinking about buying another Spectrum. Now as i grew up in the 80's and was a massive speccy fa…
... minimalist route, get a Timex TC2048. The original Speccy is a ... -
Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…
... ever set I register in contended ram on an emulator, but ... -
AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…
... at all - it uses the (contended) clock signal on the edge ... -
AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…
... at all - it uses the (contended) clock signal on the edge ... the player is running within contended RAM because the effective clock ... -
AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…
... the player is running within contended RAM because the effective clock ... -
AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…
... after discovering that the external (contended) AY had a different clock ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... to be used is already contended, it gets rid of this ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... />
The port is also contended anyway, because when the CPU ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... will be vital. Even properly contended, palette changes are instant in ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... the border colour port is contended, and the ink and paper ... entries are fetched during the contended period, the border colour load ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... . Palette updates however will be contended.
5. Changes in the ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... so when the CPU is contended anyway (pixel display update) seems ... -
which one bit of hardware would people want re-made?I'm just curious in the sense of I see interface 1's go for a fair bit on ebay and also multiface units etc.. so whats the one thing that you don't …
... work like a Spectrum 48 (TC2048, to be precise) without a ... -
just thinking about ...compo for zx 16k ? anyone ?
... all the lower RAM is contended. Don't see why ULAplus ... -
just thinking about ...compo for zx 16k ? anyone ?
... all the lower RAM is contended. Don't see why ULAplus ... without it, whole memory is contended, you really have not place ... -
Project OTLA / k7zx (high speed loading)Hello, I am proud fan of zx spectrum (I do not have speccy, but clones (Didaktik Gama, Didaktik M)), I am using portable CD player to load games. Al…
I haven't looked at the OTLA code, but I suspect it wouldn't run correctly from screen memory, since it's highly timing-critical and 16384-32767 is contended memory. -
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
... :- setting I to point into contended memory can cause snow in ... -
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
... set the I-reg to contended memory. When I loaded the ... -
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
[QUOTE=Alcoholics Anonymous;403959]It looks ok to me except for one thing :- setting I to point into contended memory can cause snow in the display in some (most? all?) models.[/QUOTE]
Snow effect doesn't exist in +3/+2A models. -
Imagine loading by tape nowadays!!!!I was bored so i did some working out how long it would take to load a more modern game at the rate old speccy tapes do which is 1500 bps (bits). 8 …
... .5Mbps when copying data to contended memory. Uncontended memory will be ... -
Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... 's just that it's contended memory but it would still ... -
Photos of MODIFIED ZX SpectrumsIf you have ZX Spectrum/clone with any modification(s), please release photos: (or send me your photos to --SPECCY(a)SEZNAM.CZ--, I upload all to my …
There's a pic of the Spectrum SE prototype (a heavily modified TC2048 ) in an issue of ZX Shed. If you can find it feel free to use the pic. -
Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…
... a surprise, the issue of contended memory crashing does not affect ... attempt at executing code in contended memory (the region 16384-32767 ... dangerous.
The contended pages are 1, 3, 5 ... crash when executing code in contended memory). Thus, you get ... -
Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…
... attempt at executing code in contended memory (the region 16384-32767 ... the 128K/+2, there are contended memory pages that can be ... be dangerous.
The contended pages are 1, 3, 5 ... crash when executing code in contended memory). Thus, you get games ... -
Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…
... . Why does code executed in contended memory cause a crash??[/QUOTE ... flakey values when reading from contended memory which causes rubbish to ... -
Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…
... flakey values when reading from contended memory which causes rubbish to ... 16k spectrum has nothing but contended ram and its prorgrams run ... I also set to a contended area, you will get ... believe that code executed in contended RAM could increase the likelihood ...