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Search Again :: Adv Search 1000 results in 0.007s
<1…12131415161718…34>
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... ;799702]Yup, it's a contended memory thing. Your snapshot version ... version into a +2A/+3, where Page 6 is contended, the sound ...
    daveysludge daveysludge October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... ,5,7) are contended whereas on the +2A/+3 and later the ...
    guesser guesser October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... ,5,7) are contended whereas on the +2A/+3 and later the ...
    daveysludge daveysludge October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... check to see if its contended?[/QUOTE]

    Having thought ... whether a RAM bank was contended though you could load a ... and another if it is contended.
    I hope I a ... , just identify 128/+2 or +2A/+3 from the paging model ...
    guesser guesser October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... whether a RAM bank was contended though you could load a ... and another if it is contended.[/QUOTE]

    Although that ... , just identify 128/+2 or +2A/+3 from the paging model ...
    Einar Saukas Einar Saukas October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... far as I know - Spectrum +2A, Spectrum +2B, Spectrum +3 and ... least, this is incorrect. The +2A/+2B/+3 [I]can[/I ... , and yes, it's still contended.
    Marko Marko November 2014 Development
  • Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…

    ... too and all the messy contended memory and clock halting stuff ... so it works with the +2A and +3 since that uses ...
    Winston Winston November 2014 Hardware
  • Spectrum +2 (grey) RAM issueHi, I?ve got a ZX Spectrum +2 (grey) with what I think is a RAM issue. I used to be able to load games very reliably by playing converted TAPs and …

    ... is split into two parts - contended (meaning that the CPU needs ... with one RAM chip in contended memory will generally affect all ... bits across the four contended pages, in this case - pages ... in 128K toastracks, and in +2A/+3 machines.

    B
    balford balford February 2015 Hardware
  • Grey +2 and +2A differencesWas the grey +2 incompatability of some of the Spectrum games fixed with the +2A -B?<br><br>

    ... , 3, 5 & 7 are contended on the 128K and +2 ... a mistake, and on the +2A it's the upper banks ... , 6 & 7 that are contended. Note that in either situation ... 0 and 2 aren't contended and 5 and 7 (the ...
    joefish joefish June 2015 Hardware
  • Renegade by ImagineOn the speccy 128/+2 you got ingame music but not on the +2a/b/3 (paging issue?), although all the 128k's had music on the menu page. Was there ev…

    I guess with enough effort you could rearrange the paging to use the correct types of contended/uncontended memory for a +2A, but it'd probably be a real ball ache to find every place where the game pages to tweak it.
    AndyC AndyC September 2015 Games
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    ... model to that of the +2A/+3, i.e. are pages ... , 3, 5 and 7 still contended, or pages 4–7, as ...
    zub zub September 2015 Hardware
  • Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…

    ... ROM with RAM on a +2A/B/+3 is to use ... three combinations all use three contended RAM banks at the bottom ... [/b]] - also lumps you with contended memory in the other two ... ] and [b]7[/b] are contended (stil including both screens [b ...
    joefish joefish February 2016 Games
  • Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…

    ... "]a loader works fine in contended ram if you reduce the ... cycle calculations for the +3/+2A because the "deadly" and superfuous ...
    Kio Kio February 2016 Games
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... what you see on the +2A and later models. This I ... [/i] because these have differently contended pages or w/e
    2A's among other things :) )
    Hikaru Hikaru April 2016 Games
  • Things you hated about the speccyFor me it would be the Kempston interface coming loose and the machine crashing after a good session of waggling my joystick.

    ... that if the +2A/+3 had the same contended pages as the ...
    AndyC AndyC October 2016 Sinclair Miscellaneous
  • Things you hated about the speccyFor me it would be the Kempston interface coming loose and the machine crashing after a good session of waggling my joystick.

    ... that if the +2A/+3 had the same contended pages as the ...
    rich_chandler rich_chandler October 2016 Sinclair Miscellaneous
  • Skate Crazy on grey +2I've downloaded "Skate Crazy" from WoS, recorded it on a real tape and tried to load to my grey Spectrum+2. Game (both parts) works only in 48k mode.…

    It's a problem with contended memory as described below
    < ... the I register points into contended ram. Emulators never bothered to ... and thus subsequently in the +2A/B and is documented in ...
    jp jp January 2017 Games
  • What are the differences between the +2 and the +2A ?I only acquired a +2 for the first time in my life a few months ago. It works fine. :) I even managed to tracke down nearly all the wargames by the s…

    ... , so is of course, contended. The other set replaced the ... />
    When Amstrad developed the +2A and +3, they switched away ... (chapter 24, page 147), the +2A (chapter 24, page 195), and ... thing about which banks are contended and which are uncontended despite ...
    1024MAK 1024MAK February 2017 Games
  • What are the differences between the +2 and the +2A ?I only acquired a +2 for the first time in my life a few months ago. It works fine. :) I even managed to tracke down nearly all the wargames by the s…

    ... "]
    When Amstrad developed the +2A and +3, they switched away ... (chapter 24, page 147), the +2A (chapter 24, page 195), and ... thing about which banks are contended and which are uncontended despite ...
    AndyC AndyC February 2017 Games
  • c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…

    ... version doesn't load on +2a or +3. Tried USR0 ... different between 128/+2 and +2a/+3. Different contention as well ... 1,3,5,7 are contended, on +2a/+3, banks 4,5 ... ,6,7 are contended. So I suppose +2a/+3 would need ... Which would be nice, as +2a/+3 could use all ram ...
    FrankT FrankT March 2017 Announcements
  • c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…

    ... version doesn't load on +2a or +3. Tried USR0 ... different between 128/+2 and +2a/+3. Different contention as well ... 1,3,5,7 are contended, on +2a/+3, banks 4,5 ... ,6,7 are contended. So I suppose +2a/+3 would need ... Which would be nice, as +2a/+3 could use all ram ...
    Geco Geco March 2017 Announcements
  • Double Buffering Artefacts on Real HardwareI have a project that I've played around with for a while and always tested using emulators, either ZX Spin or Spectaculator. It is a 128k game th…

    ... between C0h and FFh if contended memory is paged in as ... on the old machines. The +2A/+3 don't suffer this ...
    AndyC AndyC May 2017 Development
  • Double Buffering Artefacts on Real HardwareI have a project that I've played around with for a while and always tested using emulators, either ZX Spin or Spectaculator. It is a 128k game th…

    ... mostly (again except on a +2A/+3) get the result of ... can be avoided by using contended port for Kempston.

    qaop qaop May 2017 Development
  • Double Buffering Artefacts on Real HardwareI have a project that I've played around with for a while and always tested using emulators, either ZX Spin or Spectaculator. It is a 128k game th…

    ... mostly (again except on a +2A/+3) get the result of ... can be avoided by using contended port for Kempston.[/quote]
    contended port?

    Also, there ... 's the issue with the +2A/+3, as IIRC they don ...
    Hikaru Hikaru May 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... . One group is always non-contended, as the ULA has no ... which banks are contended compared to the later Amstrad +2A / +2B "black ...
    1024MAK 1024MAK May 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... 6-13 which comprise the contended 64K group that you describe ... would apply to the later +2A/+2B/+3 machines. For the ... which will give 167 for +2A/+3 or 255 for the ...
    adrian_singh adrian_singh May 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... will give 167 for +2A/+3 or 255 for ... a machine uses the +2A/+3 gate array the ... @impomatic which identifies the contended pages when the program ... runs and transparently remaps the contended/uncontended page numbering. It ... 's running on a +2A/+3 as above. It ...
    guesser guesser June 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... and FF if you have contended RAM pages in as this ... if you're on a +2A or +3 (which may make ...
    AndyC AndyC June 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... distinguish between 128K/+2 from +2a/+2b/+3 is to use ... pages 4..7 are always contended. The typical protocol for all ... control over what goes into contended memory and what goes into ...
    introspec introspec June 2017 Development
<1…12131415161718…34>

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