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<1…18192021222324…34>
  • LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…

    ... the decompression routine all in RAM at the same time. Compressed ... decompressed data, but all in RAM at the same time it ... more appropriate. You can randomly access compressed data and decompress what ...
    Alcoholics Anonymous Alcoholics Anonymous March 2012 Development
  • Manic Miner ZX81Hi Guys, Can anyone explain why [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0017539]Manic Miner ZX81[/url] is not able to reproduce the ex…

    ... a ZX81 (even with 16K RAM) could do this:

    access graphical commands within BASIC.
    mcleod_ideafix mcleod_ideafix March 2012 Sinclair Miscellaneous
  • A virtual machine in WindowsHas anyone any experience of a virtual machine in Windows? I'm thinking of trying this, mainly "just because", but also slightly because any Windows …

    ... .. but it's mainly to access more than 4gb at once ... bit.. as samples etc eat ram for breakfast.
    fog fog March 2012 Chit chat
  • Strange behaviour in real hardware but not in emulatorsWell, at least not in any emulator I've tried. I've been reported by fellow forum member Macc that both our Maritrini Monster Slayer and Retroworks'…

    ... it, as I have no access to a real 128 and ... (or $C0-$FF if the RAM page is ever 1, 3 ... (at least when a safe RAM page is initially in place ... point where you page in RAM 1, 3, 5 or 7 ...
    Jmk Jmk March 2012 Emulators
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... 4 and above. The ULA access timings shouldn't depend on ... place CPU writes to lower RAM sometimes get corrupted. I am ...
    Zorn Zorn March 2012 Hardware
  • ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…

    ... accessable RAM?

    I assume you can also then access things ...
    Paddy Coleman Paddy Coleman March 2012 Emulators
  • ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…

    ... accessable RAM?

    I assume you can also then access things ... more processor power and more ram in DSi mode could probably ...
    Arm73 Arm73 March 2012 Emulators
  • ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…

    ... is accessable RAM? I assume you can also then access things like ... is more RAM (12MB IIRC), and theoretically you get access to things ... no use for the extra RAM either - of course, I would ... love to have more RAM, but it's of no ...
    Patrik Rak Patrik Rak March 2012 Emulators
  • ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…

    ... is more RAM (12MB IIRC), and theoretically you get access to things ... no use for the extra RAM either - of course, I would ... love to have more RAM, but it's of no ... used as an even bigger RAM disk (completely non-standard I ...
    Paddy Coleman Paddy Coleman March 2012 Emulators
  • ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …

    ... , and modern cheap static RAM has an access time of 10ns.
    Winston Winston April 2012 Hardware
  • ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …

    ... ]The Softrom from Expandor switches RAM over ROM and calls NMI ... like this:
    If the access it to lower 16K (ROM ...
    ArtemKuchin ArtemKuchin April 2012 Hardware
  • RAM disk interface for 48kDoes anything like that exist?

    ... /streams code to enable access to the RAM disk from 48 BASIC ...
    chev chev April 2012 Hardware
  • The most powerful 8-bit machine, and CPU?Further to the discussion in: [url]http://www.worldofspectrum.org/forums/newreply.php?do=newreply&p=621787[/url] What actually is the best 8-bit ma…

    ... take 2 cycles. You can access the stack very easily, giving ... palette of 64), 128K minimum RAM.

    Sadly, in that ...
    Jmk Jmk April 2012 Chit chat
  • RAM disk interface for 48kDoes anything like that exist?

    ... /streams code to enable access to the RAM disk from 48 BASIC ...
    Jonathan Harston Jonathan Harston April 2012 Hardware
  • Model Railway Timetable Version 1.4.12.0313...Hi Folks, Since November 2010 I have been working on my [B]Model Railway Timetable [/B]software. Thanks to the considerable help and patience of yo…

    ... :

    [List][*]Optimise RAM disk access to reduce effect on FRAMES ...
    Paddy Coleman Paddy Coleman May 2012 Sinclair Basic
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... can be bothersome, even with access to unlimited bankswitched memory.[/QUOTE ... somewhere, at which point all RAM above the BASIC 48K becomes ...
    chev chev May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... can be bothersome, even with access to unlimited bankswitched memory.[/QUOTE ... br />
    Doesn't direct access to a (for example) 128MB ... 8-bit computer which has access to mass storage?
    < ... see the access to mass storage as virtual RAM for the Spectrum ...
    zxbruno zxbruno May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... at Intel then and had access to the latest processors and ... is a huge amount of RAM though. :smile:

    Paddy
    Paddy Coleman Paddy Coleman May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... ;625393]Doesn't direct access to a (for example) ... do when dealing with paginated RAM?[/quote]

    ... see the access to mass storage as virtual RAM for the ... the vast amount of RAM that is included with ... divIDE manages with 32K of RAM. But as I keep ...
    chev chev May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... it's in RAM. If you have to access disk to do ... =zxbruno;625393]Doesn't direct access to a (for example) 128MB ... 8-bit computer which has access to mass storage?
    [/QUOTE ... slowdown). Additionally you cannot randomly access data structures on disk without ...
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... is a huge amount of RAM though. :smile:
    ... that huge amount of RAM. It had a different ... memory management. Chip RAM and Slow RAM accessed by the ... chipset and CPU, Fast RAM accessed only by the ... a huge amount of RAM, guaranteed access to a disk drive ...
    AndyC AndyC May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... had a huge amount of RAM, guaranteed access to a disk drive ... almost a limitless supply of RAM! :o

    [QUOTE=AndyC ...
    Paddy Coleman Paddy Coleman May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... it's in RAM. If you have to access disk to do ...
    chev chev May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... was not aware it could access the RAM disk? Am I missing ...
    Paddy Coleman Paddy Coleman May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... was not aware it could access the RAM disk? Am I missing ... file system in the extra RAM. If you clear 49151 you ... be better off using the RAM disc. Depends what you're ... BASIC program fits below fast RAM.
    chev chev May 2012 Sinclair Miscellaneous
  • Outrun Europa in colourSwainy suggested that he'd like to try his luck with Outrun Europa colorful graphics and see if they can be improved. Let's give him the chance :) A…

    ... with the same amount of RAM available as on a BBC ... else that needs an all-RAM mode (such as the IF2 ... reasonable number of people have access to). However, I've always ...
    chev chev May 2012 Development
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... chunk of the entire 48k RAM when you let go of ... with code size of 48k RAM is to severely limit what ... for data) so that disk access is less frequent but this ...
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Development
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... of the entire 48k RAM when you let go ... with code size of 48k RAM is to severely limit ... data) so that disk access is less frequent but this ... between juggling paged RAM, and using random access to a disk ... . Paged RAM without an MMU ...
    chev chev May 2012 Development
  • OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…

    ... with EPROMS and you have access to an Interface II or ... want to use the additional RAM in the 128K machine ... below the top 16K of RAM, use OUT commands to ... copy data from paged RAM to main RAM. Or you could wait ... to write a channel based RAM disk. Likewise it's ...
    chev chev May 2012 Sinclair Basic
  • OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…

    ... with EPROMS and you have access to an Interface II or ... want to use the additional RAM in the 128K machine ... below the top 16K of RAM, use OUT commands to ... copy data from paged RAM to main RAM. Or you could wait ... to write a channel based RAM disk. Likewise it's ...
    Paddy Coleman Paddy Coleman May 2012 Sinclair Basic
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Latest Posts

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  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
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