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Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
Each 3rd of the screen provides 2Kb of memory (and an additional 256 bytes if you include the attributes area).
Nice one Icabod, it never occurred to me though of the fact that the lower RAM isn't contended during the border trace! -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... you complete your code in contended RAM (which screen$ memory is ... as well. In other words, contended memory is slow only when ... apply to +2A,+3, where contended memory is slow during the ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... as well. In other words, contended memory is slow only when ... apply to +2A,+3, where contended memory is slow during the ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... apply to +2A,+3, where contended memory is slow during the ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
The +2A/+3 would just have the edge over the rubber key machines running in contended RAM. -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... +3 is slower/faster in contended memory than ZX 128k or ... make simple speed comparison of contended memory? Let's say how ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... less contention points, it is contended during [B]complete frame[/B ... -
Reconditioned Sam Coup?, two drives + more...I've popped up a reconditioned Sam Coupé on eBay as a Buy-It-Now listing. [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=11012902618…
... the Sam's memory is contended (as the memory has to ... -
Growing up... Jasmin supports 128/+2 nowHi, all. New version of Jasmin is available (v0.11). It supports ZX Spectrum 128 and ZX Spectrum +2 models. Try it [URL="http://www.dustedpixels.co…
... place when reading/writing to contended area of the memory - it ... place when writing to non-contended memory areas.
I ... -
Growing up... Jasmin supports 128/+2 nowHi, all. New version of Jasmin is available (v0.11). It supports ZX Spectrum 128 and ZX Spectrum +2 models. Try it [URL="http://www.dustedpixels.co…
... you get contention only for contended memory, and why you can ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... each model only gets one contended memory fetch during each eight ... cycle contended sequence.
As ... . So, when running in contended memory, the 48K/128K ULAs ... still see a contended memory address sitting on ... -
Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…
... the system layout (busses, RAM, IO, etc) is based on 8 ... -
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... interrupt to the start of contended memory), so anything less than ... -
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... be perfectly in sync for contended memory (since the ULA will ...Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... be perfectly in sync for contended memory (since the ULA will ...Border emulationHow is the border emulated to do all the fancy little tricks such as in Aquaplane? I've got some basic border emulation working but it only displays…
... emulation of memory (and possibly IO) contention is required. Without it ...Border emulationHow is the border emulated to do all the fancy little tricks such as in Aquaplane? I've got some basic border emulation working but it only displays…
... emulation of memory (and possibly IO) contention is required. Without it ...The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... , I'll probably leave precise contended memory emulation as optional for ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... .uk/frobush/saucer/Z80/Source/contended.asm[/url]
[url]http ..."Add Watch" Debug for EmulatorsHi, I am working on completing a JSW-style game that I started in 1991. Although programming using TASM and Spectaculator is far easier than on th…
... bothered about the emulation of contended memory. Nice one mate.Another TS Emu CartLooks like the one I have. [url]http://cgi.ebay.com/TC2068-Cartdrige-48K-emulator-for-Timex-Computer-2068_W0QQitemZ250133271074QQihZ015QQcategoryZ124…
[QUOTE=Alcoholics Anonymous;197828]TC cartridge, not TS :-)[/QUOTE]
I think those cartridges are all TC (Portugal) with TC2048 ROM. TS don't have manufactored them....Another TS Emu CartLooks like the one I have. [url]http://cgi.ebay.com/TC2068-Cartdrige-48K-emulator-for-Timex-Computer-2068_W0QQitemZ250133271074QQihZ015QQcategoryZ124…
... are all TC (Portugal) with TC2048 ROM. TS don't have ...UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
... ]
Very interressed on TC2048... Let me know when the ...Yesteryear's Computers.Ahhhh ... [URL="http://www.computerworld.com/action/article.do?command=printArticleBasic&articleId=9023960"]back in the day[/URL] when a 300mb system…
... .
I blew up the IO-interface while building a transfer ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... .uk/frobush/saucer/Z80/Source/contended.asm[/url]
[url]http ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... .uk/frobush/saucer/Z80/Source/contended.asm[/url]
[url]http ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... .uk/frobush/saucer/Z80/Source/contended.asm[/url]
[url]http ...New Spectrum HardwareHi all. Well its Friday so it seems as good a time as any (business is a bit slack at the moment) to start up a thread about creating new Spectrum ha…
... .e. 3.5hz but no contended memory)
[/QUOTE]
Yes ...Machine CodeHi all, I want to get a machine code/assembler/dissasembler program from the WOS archives. But what in your opinion would be the best to get? I don`t…
... .uk/frobush/saucer/Z80/Source/contended.asm[/url]
[url]http ...