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<1…15161718192021…34>
  • 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…

    I think you would be best leaving the low 16K RAM alone and just paging the top 16 or 32K RAM instead.
    BloodBaz BloodBaz July 2007 Hardware
  • EMUZWIN assembler questionNot sure if Vladimir still frequents the forums but maybe someone else knows the answer to this. Using EMUZWIN's assembler it should be possible to …

    ... of routines to a different ram page. when i assemble it ... , ie. below where the extra ram is paged in - but im ... /> Or else there is a bug here??
    dmsmith dmsmith August 2007 Emulators
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... with a copy of regular ram with all the system variables ... to do lots of 128 paging to save the correct blocks ...
    FrankT FrankT August 2007 Sinclair Basic
  • Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…

    ... block of memory exists in ram twice, but PC would still ... have changed just from paging it into upper ram.

    Unless ... you page it into upper ram as well.
    icabod icabod September 2007 Development
  • What did Spectrum BASIC lack (and was BBC BASIC so good?)Over the years, I've read in various multi-format magazines, that BBC BASIC was probably the best BASIC available on an 8-bit machine. I've never use…

    ... the price of space in RAM (and the Beeb did like ... to take a lot of RAM for system use.[/QUOTE]
    paging in a 12 KB window ... for a given price, more RAM and CPU and a crap ... nVidia SLI setup and less RAM and CPU power? Depends what ...
    zub zub September 2007 Sinclair Basic
  • Got my mac mini and I'm in loveI have had it for about 2 days now and it is the 2nd best piece of computer equipment i have had, it is quieter then my dvd HD recorder i have been s…

    ... power supplies are a real bug-bear of cheap PCs, and ... out was one stick of RAM, so I'm down to ...
    The Starglider The Starglider September 2007 Chit chat
  • Damn, I think I need a reflow ovenOr a reflow frying pan at least... I was just assembling an order through Farnell since I've worn out another soldering iron tip (which has actually…

    ... , and utility programs), a static RAM (probably 512k again) which will ... of flash and 8k of RAM at the same time, or ... as the glue logic for paging memory and accessing the CP2201 ...
    Winston Winston September 2007 Hardware
  • Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…

    ... ). Real ZX128 / +2(grey) contain bug in programmable HAL chip equation ... value). If you disable memory paging(OUT 32765,48 ), 128 port ... my web page is new bug-fixed HAL chip replacement (GAL16V8 ...
    velesoft velesoft October 2007 Development
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... doesn't have to access RAM at the same time as ... 't fall foul of this bug/glitch/software issue.

    LaesQ LaesQ October 2007 Hardware
  • ZX Spin assembler - where am I going wrong?I'm trying to use the assembler in ZX Spin, but I'm getting error messages. Here's a screenshot of the first simple program I'm trying to get workin…

    ... m afraid there is a bug in the assemble dialog - ... so your code went into RAM bank 7, since you ... actually run a program, RAM bank 0 is paged into ... [/code]

    Since each RAM bank is 16K long, address ... you need to assemble into RAM 0 at 49152 in ...
    Marko Marko October 2007 Development
  • A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…

    ... prevent the IF1 ROM from paging in by holding A15 high ... for the upper 32K of RAM). But there's still race ... switch state when I'm paging in my ROM, so there ...
    Winston Winston October 2007 Hardware
  • Testing the Ram on a Toastrack 128KHi All My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the background scr…

    ... full details of the paging, but basically the ram-page that's ...
    icabod icabod October 2007 Hardware
  • SAM gets ethernetWhilst off topic - head over to [url]www.samcoupe.com[/url]. Colins got his ethernet board for the SAM available to buy and some interesting news ab…

    ... ROM and >=128K static RAM (any internet application is likely ... pages, and any page (ROM, RAM, W5100 buffer) should be arbitrarily ... W5100 in 0x2000-0x3FFF, or RAM in 0x0000-0x1FFF, ROM in ... research and simulation of the paging mechanism using the Xilinx WebISE ...
    Winston Winston October 2007 Hardware
  • Do you want XP to look like Vista ? Look what I've foundI have just found this, i have loaded it onto my XP Media Center PC and it looks fantastic, kind of a facelift for XP PC's :) [url]http://www.crys…

    Love my darkish W2000 SP4 as they are.

    XP? Bug-ridden useless graphic bloat.
    Vista? C'mon... 700MB RAM used by bare-bones OS???
    Marcelo Marcelo October 2007 Chit chat
  • Do you want XP to look like Vista ? Look what I've foundI have just found this, i have loaded it onto my XP Media Center PC and it looks fantastic, kind of a facelift for XP PC's :) [url]http://www.crys…

    ... ? Bug-ridden useless graphic bloat.
    Vista? C'mon... 700MB RAM used ...
    IN31 IN31 October 2007 Chit chat
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... /> Poolsdata (Selec Software) - Sport
    Ram-Jet +3 () - Utility
    Rock ...
    Top of RAM 57571
    Top of RAM for 'T' 57571 ... be grabbed.


    Ram-Jet +3:-
    I've ... routine. It calls the 128K paging routine, and it copies some ...
    Digital Prawn Digital Prawn November 2007 Games
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... cycles for 16k part of RAM only makes me sure that ... ; refresh via read access, one bug -> snow effect)
    brian-82 brian-82 November 2007 Development
  • Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?

    ... would suggest any means of paging the interface in, so that ... ][/I]) into the Spectrum's RAM (at $5B00) and runs that ... -$1FFF and has no extra RAM, AFAICS.
    [*]The Microdriver's ... ROM?
    [*]The Microdriver's RAM? ? more likely ? it's possible ...
    zub zub November 2007 Hardware
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... cycles for 16k part of RAM only makes me sure that ... ; refresh via read access, one bug -> snow effect)[/QUOTE]
    RAM more frequently than 7,68 ... not required when using NEC4116 ram.

    I need to ...
    csmith csmith November 2007 Development
  • How does the Z80 communicate with hardware?How does the Spectrum (or Z80) interact with other hardware devices? I think devices can communicate with the CPU through interrupts, but how can the…

    ... device's ROM and/or RAM, if it has them. It ... device to have its ROM/RAM be "paged in" over the ... be used to control the paging, allowing the device to page ...
    zub zub November 2007 Development
  • Interface rom - Need help to dump itHi, I have temporarily an interface that is similar to a multiface. It has an NMI button and displays a menu where states can be saved and pokes ent…

    ... ROM to high RAM (above 32768, for example), paging the device ROM ... out, and then saving the RAM bytes ...
    Marcelo Marcelo November 2007 Hardware
  • Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?

    ... , where execution at $0038 toggles paging and I/O to port ... , and another of which is paging out the IF1 ROM so ... ) when executing a RET in RAM at $2000.

    [QUOTE ... 's ROM from $0000-$0FFF, RAM from $2000-$27FF, and probably ...
    zub zub November 2007 Hardware
  • Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?

    ... where execution at $0038 toggles paging and I/O to port ... s about the method of paging in the ROM. You ... into the Spectrum's main RAM, since only one ROM ... one time (copy program into RAM, call it, this code ... restores the Spectrum's RAM contents at this location).< ...
    Winston Winston November 2007 Hardware
  • Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?

    ... 's about the method of paging in the ROM. You've ... into the Spectrum's main RAM, since only one ROM can ... one time (copy program into RAM, call it, this code pages ... and restores the Spectrum's RAM contents at this location).[/QUOTE ...
    zub zub November 2007 Hardware
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... in the Spectrum's main RAM. Given the single cored ... socket library ROM page and RAM workspace. A15 held high to ... reset to prevent downstream peripherals paging in on 0x0000 execution. ... high to stop other ROMs paging in), paging latches on downstream devices ...
    Winston Winston November 2007 Hardware
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... the "player gets a blackjack" bug.

    To do this ... that is stored in video RAM yet hidden from the player ...
    Digital Prawn Digital Prawn November 2007 Development
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... I think there is a bug in the W5100, because bus ... 'm convinced it's a bug in the W5100 - it looks ... DE is the destination in RAM, and B is the number ...
    Winston Winston November 2007 Hardware
  • FATware on +divIDE and ZX SpinHello, My (real) +divIDE running FATware 0.12 was reading snapshots from a FAT (16) formatted CF card perfectly last week. Now, on reset, it recogn…

    ... not detect FAT16. This is bug in Fatware OS[/QUOTE]
    ResiDOS is still crashing when paging it in. Any ideas guys ...
    BloodBaz BloodBaz December 2007 Hardware
  • New Spectrum game - Isotopia by OctocomOctocom, the guys who made BASIC programmed games such as Pandemia or Insert Coins, released yesterday their very first compiled BASIC game: Isotopia…

    ... a difference are the memory-paging & contention timing differences, but ... BASIC commands to access the RAM disk use different syntax. In ... thru' and fro using the RAM disk, hence the need to ...
    na_th_an na_th_an December 2007 Games
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Latest Posts

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    John Elliott on April 21
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