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  • DivIDE and RWAP's DiwIDE*Opps, sorry, wrong forum, this thread must be in hardware topic.* I was planning to get a divide from Rwap, but I'm too afraid of long way the devi…

    ... />
    I think the possible RAM/ROM extension should be a ... ROM pages (the amount of RAM is not a real bottleneck ... theory though, even with divIDE paging in 128k ROM enabled, maybe ...
    baze baze January 2007 Development
  • Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…

    ... we can get the extra RAM/ROM needed).

    My ... the Spectrum relies on mempry paging, whereas the QL has contiguous ... larger ROMs and greater onboard RAM, the firmware authors could work ...
    rwap rwap January 2007 Hardware
  • DivIDE and RWAP's DiwIDE*Opps, sorry, wrong forum, this thread must be in hardware topic.* I was planning to get a divide from Rwap, but I'm too afraid of long way the devi…

    ... in Control register reserved for RAM pages... but just to ... /> This allows for addressing 128k RAM.

    Now for ... for developers that ROM and RAM are paged independently. Since ... that 11000xxx is the ROM paging extension etc... with enough care ...
    baze baze January 2007 Development
  • ResiDOS v1.92 and +3e ROMs v1.30 releasedI've just updated ResiDOS to v1.92, and the +3e ROMs to v1.30. Full details can be found at: [URL="http://www.worldofspectrum.org/zxplus3e/"]http://…

    ... the point of having 512K RAM is when you've got ... don't know if the paging scheme used by the interfaces ...
    John Elliott John Elliott January 2007 Hardware
  • DivIDE and RWAP's DiwIDE*Opps, sorry, wrong forum, this thread must be in hardware topic.* I was planning to get a divide from Rwap, but I'm too afraid of long way the devi…

    ... ResiDOS - could this extra RAM/ROM facility be implemented ... mixing of MB-02 paging using port #17 and ... select the mode (DivIDE, ROM, RAM, reset).
    - Q5 ... - when set in ROM/RAM mode, DivIDE traps are ... enabled with selected ROM/RAM banks. This disables the ...
    rwap rwap January 2007 Development
  • Multiface 128 WoesI have a customer who has a couple of Mutliface 128s which are not working. He has managed to save some snapshots (and reload them) in the past, but…

    If it's not the Spectrum's M1 line, it must be the paging logic. Luckily, all the chips can be bought off the shelf, except the RAM and the ROM. Would probably be an easy fix for somebody "in the know".
    DEATH DEATH February 2007 Hardware
  • I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…

    ... ula starts to read video ram at cycle 14337. if the ... in FPGA. We have found bug in the Spectrum 48k Reference ...
    Mp Mp February 2007 Development
  • I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…

    ... FPGA is also implemented 16kB RAM (the contended part). ROM is ... in Intel StrataFlash. Rest of RAM will be implemented in external ... DDR RAM (at the moment my friend ... video part. And today fixed bug that caused my keyboard to ...
    brian-82 brian-82 February 2007 Development
  • 16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.

    ... the Spectrum SE's sideways RAM comes in handy. It is ... time (in alternate banks) so paging logic (such as that used ...
    chop983 chop983 March 2007 Emulators
  • Fuse for Mac OS X 0.8.0-pre2A new public preview of the next version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/pr…

    ... seems to be a bug with the sideways RAM in the Spectrum ...
    Fred Fred March 2007 Emulators
  • CEZ-GS strikes back with new Spectrum stuff...Something new is aproaching...March 10th will be a great day for our Spectrum! as you can read in this news... [url]http://computeremuzone.com/?id=n…

    ... work and switch back to RAM 0.
    [/quote]

    paging code around it. But I ... think I still prefer the paging around the sp1_UpdateNow() call as ...
    Alcoholics Anonymous Alcoholics Anonymous March 2007 Games
  • Galaksija emulator for ZX Spectrum +3/+2A(black)This is a NEW program/utility/game pack for ZX Spectrum. It is basically an emulator of an ex-Yugoslav computer "Galaksija" which is also Z80 based. …

    ... .

    btw. the SE paging is used BEFORE the +3 ... the SE I use the RAM test instead of IN $FF ... ;-) So I just page in RAM and write $FF and $00 ...
    Tom-Cat Tom-Cat March 2007 Emulators
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... complete source code for the paging!
    The bx register holds ... other addresses that perform the paging and so I believe that ... (inc -RD) are checked before paging occurs. It would be dangerous ... unintentional place within ROM or RAM.
    BloodBaz BloodBaz March 2007 Emulators
  • Multiface ResidentI'm thinking about adapting some existing code to be Multiface "resident"... but being perfectly honest I'm not quite sure where to start. Any top t…

    ... /> in a,(191); page multiface RAM 'IN'
    ;Multiface 48 is ... /> in a,(63); page Multiface RAM 'OUT'
    ;Multiface 48 is ... well (DI before paging in and EI after paging out).

    RAM with you as part of ...
    Mr. Anonymous Mr. Anonymous March 2007 Development
  • Dead +2B, help required...It was bought defective on ebay. It came with two faults: a "dead" power supply (it was the fuse) and a faulty main unit. The power supply is now re…

    ... I have, none of the RAM chips warm up at all ... the register for the memory paging mechanism, but I haven't ...
    Winston Winston March 2007 Hardware
  • Amstrad +2 Diagnostic BoardCan anybody help I wish to buy the Diagnostic Board that connects to the I/O strip at the back of the Amstrad ZX Spectrum +2. Many thanks Martin

    ... without needing to use screen RAM or the ULA
    * ability ... up/reset, in either case paging in the flash vs Spectrum ...
    Winston Winston March 2007 Wanted
  • Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…

    ... then if you have a paging problem or a dirty edge ... variables are created in a bug-free routine.

    As ... Spectrum ROM there is a bug in Interface 1 which ensures ...
    Geoff Geoff March 2007 Hardware
  • ResiDOS v2.00 releasedI've just posted a major new release of ResiDOS, at: [URL="http://www.worldofspectrum.org/residos/"]http://www.worldofspectrum.org/residos/[/URL] T…

    ... ]I take it the RAM needs to be battery ... as it does have 2x16K RAM plus 2x16K ROM available ... any apps which allocate extra RAM banks (ie ZXZVM) would ... runs on has a simple paging system, where you output ... switch banks. The SE's paging is rather, er, esoteric... ...
    glancaster glancaster April 2007 Hardware
  • It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …

    ... 've just tested the ROM paging part properly with a replacement ... (i.e. don't touch RAM for a while and then ... a ROM checksum program to RAM (the RAM test passed by this ...
    Winston Winston April 2007 Hardware
  • ZXSpin 0.62 Available nowAs promised (and only a [i]little[/i] past the deadline) here is the latest version of ZXSpin. Many bugs have been fixed, and a few new features add…

    ... /> Yeah, that's a known bug, but hardly warrants a fix ... evening with more accurate +D paging.


    Edit: RamSoft ...
    Dunny Dunny April 2007 Emulators
  • ZXSpin 0.62 Available nowAs promised (and only a [i]little[/i] past the deadline) here is the latest version of ZXSpin. Many bugs have been fixed, and a few new features add…

    [QUOTE=chop983;181414]Erm, when in 16k mode I'm unable to find 32k ram pack in the tools/options/peripherals menu[/QUOTE]

    Sorry, but I'm not emulating any new hardware - go bug Jon for it.

    D.
    Dunny Dunny April 2007 Emulators
  • Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …

    ... RAM pages until it found what it wrote with the previous paging ...
    obo obo April 2007 Hardware
  • Interface 1 with 3.5" floppyHas this been done or can it be done? Using an interface 1 and a powered 3.5" floppy disk drive (with a modified cable) instead of a microdrive?

    ... />
    - It used no system RAM,
    - Built in snapshot button ... ,
    - Has it's own RAM bank, including a small amount ... used to alter the shadow RAM), I can't remember the ... gives you a fair bug of shadow RAM to run (Genie (a ...
    ewgf ewgf May 2007 Sinclair Miscellaneous
  • New speccy part 2As a quick recap, I am looking to create a 'new speccy hardware' platform, which will retain the charm of the original 48k beast. The way intend to …

    ... new ibook with 512mb of ram, it kept falling over in ... and this is a real bug bear, I dont want the ...
    Toxitalk Toxitalk May 2007 Sinclair Miscellaneous
  • New speccy part 2As a quick recap, I am looking to create a 'new speccy hardware' platform, which will retain the charm of the original 48k beast. The way intend to …

    ... posting details of a different bug every day for a month ... run it, have lots of ram and gigs of harddisk space ... for a few meg of ram and less then 50mb hard ...
    Toxitalk Toxitalk May 2007 Sinclair Miscellaneous
  • InterfaceHi I'm building a spectrum emulator. I've tried to build it as modular as possible, for example I have a zx class that have input and output devices…

    ... in the Spectrum ROM, the paging in circuitry will switch.
    RAM?) and assign a callback at ...
    BloodBaz BloodBaz May 2007 Emulators
  • InterfaceHi I'm building a spectrum emulator. I've tried to build it as modular as possible, for example I have a zx class that have input and output devices…

    General ROM paging is all done in hardware. ... a Spectrum (both ROM and RAM) has what are known as ... 32K bank (the way the RAM gets selected is slightly different ...
    Winston Winston May 2007 Emulators
  • 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…

    ... introduces an I/O ports paging. Original BetaDisk sits between Spectrum ... allows Betadisk ROM to change RAM pages via #7FFD.
    As ... correct ROM. Having vector in RAM will not work because when ... (jumps to #3Dxx and to RAM will activate/deactivate Betadisk I ...
    Sonic Sonic May 2007 Hardware
  • Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…

    The ULA controls the lower RAM (including contention by withdrawing the ... /CAS signal from reaching lower RAM when you want yours paged ... alone - and that way, lower RAM will continue to get refreshed ... to be careful about when paging out lower memory is that ...
    Winston Winston June 2007 Hardware
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... turns out is not a bug but an optimization. In C ... Spectrum strings are stored in RAM so we *can* change them ... data segment gets mapped to RAM and is therefore writeable. Since ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
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Latest Posts

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ram 12.6K 21.4K
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