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A few questions regarding EmuZwinA few questions regarding EmuzWin 1. I have been trying to write a program to generate multicolour effects on the Spectrum,ie more than 2 attributes…
... have something to do with contended memory, but don't know ... -
A few questions regarding EmuZwinI had posted this in the development forum and then remembered there was an emulators forum, so apologies for the repetition. 1. I have been trying …
... have something to do with contended memory, but don't know ... -
How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…
... if SP is pointing to Contended Memory, specially to the display ... -
Memory Map/ContentionHi I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scrolling…
... bytes
5B00-7fff 08k Contended Memory
8000-FFFF 32k ... -
Which would be fasterSay you want to use a variable value of 0 to 255 in a BASIC program, which way would be fastest? Say for arguments sake you wanted to use two variabl…
... store the value in non-contended memory above RAMTOP, i.e ... -
ZX Spectrum +3 - incompatible ?Hello :) I'm newbie here. I know WOS site since years, never checked forum before ;) , but this moment came when I have problem. I wanna buy ZX Spe…
... the RAM banks were now contended causing high-speed colour-changing ... -
My to-buy listWhat I want to buy: -ZX80 - [COLOR="Red"]bought[/COLOR] -ZX81 - [COLOR="Red"]bought[/COLOR] -ZX Spectrum 48K - [COLOR="Red"]bought!!![/COLOR] -ZX…
ZX Spectrum technical information wiki[With vague apologies for the multi-post] In order to push out updated information quicker than is currently happening with the [url=http://www.worl…
... ] and contains updated and improved contended memory information compared with that ...ZX Spectrum technical information wiki[With vague apologies for the multi-post] In order to push out updated information quicker than is currently happening with the [url=http://www.worl…
... ] and contains updated and improved contended memory information compared with that ...Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…
... faithfully reproduced,
along with contended and uncontended floating bus reads ...Compatible SpectrumsFollowing some recent coding exploits I've been thinking about compatibility of various models of ZX Spectrum. Yes, it's a common question on the for…
... /+3 had different pages of contended RAM (I think 1, 3 ...Ports AccelerationOn ZX48 or 128/+2(grey) is contended and uncontended ports. For example: if you will read 512 bytes sector from IDE device to ZX ram via INI or INIR,…
... or 128/+2(grey) is contended and uncontended ports.
For ... , half of all ports will contended (slow down by ULA). ULA ... A14=1, ports is slow (contended)
If A15=1 and ... is set, ports is slow (contended)
Example of slow ...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…
... .
But how is contended memory refreshed? By constantly reading ...RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…
... .
Spectrum 48k, Timex TC2048, TC2068, TS2068
No RAM ...ANN: ColorPRINTColorPRINT gives you 256 fully programmable Timex mode 2 characters (maximum 16 colours per character if you have bright black) to use in your 48 BAS…
... BASIC programs on the Timex TC2048 (48 BASIC only) or the ...updated Fatware - keyboard patchHi! I work with Fatware code and already prepare keyboard patch for original version 0.12. Now it's possible to operate disk browser with keys: 1) c…
... will flash my Divide+ with TC2048 and test it in real ...IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... bus cycle that might affect contended memory, and the ULA stops ... directed to the ULA) as contended I/O if A8-A15 ... is, IN 255 is not contended.
Here you have ...25 years with the SpectrumTo paraphrase JFK, ask not what your Spectrum can do for you, but what you can do for your Spectrum. Well I've done quite a bit since I joined the sc…
... MacSpectacle and FUSE
* Add TC2048 support to vbSpec
* Add ...TIMEX Sinclair 2068 => ZX Spectrum/Timex2048?Hello. I have opportunity to buy Timex Sinclair 2068. According to www sites dedicated to Timex machines, TS 2068 can handle only 7% (!) of Spe…
How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…
... and fourth?) Z80 shared our contended memory, then we could "easily ... CPU1, has access to the contended memory, but only when neither ...Skooldaze TooDear WoSsers, Thanks to Skoolkid's disassembly I'm attempting to write a new "improved" version called [B]Skooldaze Too[/B]. As part of the improvem…
... ) It doesn't run in contended RAM so much. The new ...DidntXSpectrumoh yes i just found this emulator for the Xbox 1 and boy is it good. It has loads of options loads almost any format going and fairplay is very close…
... , 128, +2, +2a, +3, +3e, TC2048, TC2068, TS2068, Pentagon, Scorpion, SE ...New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... /> Speed-up slow ZX memory (contended memory pages)
Hardware unrainer ...Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …
... /> - MEMPTR internal register emulation
- Contended-memory emulation
- Border effects ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]
[quote]Memory banks 1,3,5 and 7 are contended.[/quote]
Really? I thought it was banks 4, 5, 6 and 7 that are contended.Disconnecting speaker in TC2048Hello, Does anyone know how speaker in Timex is connected to motherboard? Can it be just unplugged? I would like to disable it somehow (and pass the …
Hello,
Does anyone know how speaker in Timex is connected to motherboard? Can it be just unplugged? I would like to disable it somehow (and pass the sound via the mic output to TV set) but I do not want to destroy something.
I asked because my ...Contention detectionJust a thought, based on discussion elsewhere... Is there any way of telling if reads/writes are being contended around the time that they happen? L…
... if reads/writes are being contended around the time that they ...+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... is set to point to contended memory still occurs, and also ... is set to point to contended memory.[/quote]
Will ... mode, with RAM bank 4 (contended memory) in 0x0000-0x3FFF, and ...
