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DMA interface for ZX Spectrum[url]http://velesoft.speccy.cz/data-gear.htm[/url] This is internal DATA-GEAR interface for any 8-bit computer with Z80CPU. Use Direct Memory Access…
... ;175908]If DMA access to contended memory, ULA stopped clock for ... example of DMA transfer with contended memory. DMA read and write ... -
External Speccy CommunicationHow does a speccy communicate with the outside world ?? Do you have to have the interface 1 for serial communications ( rs232 ) or are there other p…
... of dataflash. There are spare IO lines, so connection to a ... -
My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
... doubt any of the block IO instructions will cause 48K BASIC ... -
Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…
... was probably running it in contended memory either, but most of ... -
Need advice choosing one of these optionsA few spanish friends are willing to help me build and program the ethernet interface for the Speccy. Here are the possibilities. Any advice would be…
... spectrum > serial IO interface. For whatever serial IO you choose (I2C ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
[URL="http://homepage.ntlworld.com/mark.woodmass/amaurote.csw"]This[/URL] loader works well in contended memory under emulation. I've not tried it on real hardware. -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... [/URL] loader works well in contended memory under emulation. I've ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... counts and eventually it was contended memory that was causing the ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... counts and eventually it was contended memory that was causing the ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... /48kreference.htm"]this[/URL]. The contended memory section is about halfway ... -
Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... 128k models, there's no contended RAM and there's no ... -
GP2X - Spectrum EmulationHi all. Looking for advice on the GP2X and (especially) the quality of its ZX Spectrum emulation. Has anybody anything to say about the console - is…
... should. It's due to contended memory emulation, which was only ... -
Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
...
Kraplock2 - Woodys loader
Contended Loader - Woodys loader again, needs ... -
Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
... /> [QUOTE]Kraplock2 - Woodys loader
Contended Loader - Woodys loader again, needs ... would argue that Woody's contended loader would fall under the ... -
Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
... ), 256 char alphabet
Contended Loader - 256 char alphabet, A ... -
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 ... -
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 ...