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Search Again :: Adv Search 1000 results in 0.009s
<1234567…34>
  • Anyone after 4164s...If anyone's after 4164 RAM... ... I'm in Houston at the moment, and EPO has some 4164 RAM in the shop, 100, 150 and 200ns variety, for $1 each. If …

    ... $3.75 each. Unfortunately, no Z80 DMA (I'd really like to ...
    Winston Winston February 2008 Hardware
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... Sinclair Spectrum, with a true Z80 and a true ULA, and ... can boost performance, like a Z80-DMA inboard, or a DivIDE to ...
    mcleod_ideafix mcleod_ideafix August 2009 Development
  • esxDOS v0.8.7 releasedesxDOS v0.8.7 has been officially released. Grab it at http://www.esxdos.org/files/esxdos087.zip. This version has the following (notable) new fea…

    ... features:

    [list][*]Experimental Z80 DMA (Z8410) I/O support (enabled ...
    Alessandro Grussu Alessandro Grussu June 2019 Sinclair Miscellaneous
  • T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …

    There is a faster way... But you need a Z80 DMA chip (like the one in MB02), but then it not compatible with normal Spectrum. I had somewhere a schematic of Data Gear (Z80 DMA interface)...
    LCD LCD April 2004 Development
  • Flicker on my scrolling demo, any ideas?I have created a scrolling demo downloadable from [url="http://www.peargames.co.uk/downloads/scroll.z80"]http://www.peargames.co.uk/downloads/scroll.…

    ... 128 screen switching
    or Z80 DMA ?
    Fikee Fikee May 2005 Development
  • Flicker on my scrolling demo, any ideas?I have created a scrolling demo downloadable from [url="http://www.peargames.co.uk/downloads/scroll.z80"]http://www.peargames.co.uk/downloads/scroll.…

    Cool, thanks.

    Can you explain the Z80 DMA option?
    robpearmain robpearmain May 2005 Development
  • Flicker on my scrolling demo, any ideas?I have created a scrolling demo downloadable from [url="http://www.peargames.co.uk/downloads/scroll.z80"]http://www.peargames.co.uk/downloads/scroll.…

    ... />
    Can you explain the Z80 DMA option?
    [/quote]

    DMA chip which can move data ...
    Fikee Fikee May 2005 Development
  • in quest for a z80 :DI am trying to find a Z80A in some retail shops here in Greece. I have only located the following CPUs branded as either Z80 without anything else o…

    ... '82)
    [*](Z8410) Z80 DMA Direct Memory Access Controller
    [*](Z8420) Z80 PIO Parallel Input/Output Controller ... Circuit
    [*](Z8440) Z80 SIO Serial Input/Output ... async)
    [*](Z8470) Z80 DART Dual Asynchronous Receiver/Transmitter ...
    Marcelo Marcelo December 2006 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... achievement that demonstrates power of DMA (= move memory block ... visual effects without knowledge of DMA programming. Demonstration of it ... The last point, Z80 DMA is natural companion of Z80 CPU. In fact ... Spectrum can gain benefit of Z80 DMA, also ZX 81, CPC, ...
    omega omega October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... last point, Z80 DMA is natural companion of Z80 CPU. In ... can gain benefit of Z80 DMA, also ZX 81, CPC ... ]

    Yes z80 dma makes for faster data transfers ... programming overhead of the dma would make it no ... to having such a z80 dma device. For example, ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... quote=Alcoholics Anonymous;217679]Yes z80 dma makes for faster data transfers ... described continuous mode, where DMA takes care about full block ... benefit to having such a z80 dma device. For example, it ... . As I wrote above, DMA is easiest / cheapest accelerator ...
    omega omega October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... .cz/data-gear/dma-multitech/multitech-dma-drivers_omega%28dna%29. ... speccy.cz/data-gear/dma-multitech/multitech-dma-drivers_omega(dna).zip[/ ... : who will write new DMA effect or demo and beat ... can you design DataGear with Z80 DMA and Z80 CTC built in? Interrupt ...
    omega omega October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... : can you design DataGear with Z80 DMA and Z80 CTC built in? Interrupt ... /> Yes, PLCC version is same DMA chip, only with different package ... (7-8 USD). But CMOS DMA in DIP package use too ... original uncontended DRAM in ZX, DMA can use 1T transfer mode ...
    velesoft velesoft October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... : can you design DataGear with Z80 DMA and Z80 CTC built in? Interrupt ... to look back and think "DMA is nice, but it would ...
    lordcoxis lordcoxis October 2007 Hardware
  • Anyone after 4164s...If anyone's after 4164 RAM... ... I'm in Houston at the moment, and EPO has some 4164 RAM in the shop, 100, 150 and 200ns variety, for $1 each. If …

    ... $3.75 each. Unfortunately, no Z80 DMA (I'd really like to ... build the DMA mod).[/quote]

    Winston ...
    Marcelo Marcelo February 2008 Hardware
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... ? If and when ResiDOS supports DMA transfers, this may be useful ... new CMOS version of ZILOG Z80 DMA. I have only 30 psc ... of original old DMA chips used in MB02+ (UA858D ... ). DMA transfer is ideal for VIDEOs ...
    velesoft velesoft April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    This is fixed DMA sequence - work with all Z80 DMA clones (UA858D, ... MOSTEK,ZILOG ....)

    ;DMA transfer ... br /> org 23300

    ;DMA programming

    Z80DMA ld ...
    velesoft velesoft April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... DMA sequence, registr C = port DMA
    otir ;write complette DMA sequence to Z80 DMA ... (after last OUT is started dma transfer ... br /> db $87 ;ENABLE DMA - start DMA transfer

    ...
    velesoft velesoft April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... ]This is fixed DMA sequence - work with all Z80 DMA clones (UA858D,MOSTEK ... ,ZILOG ....)

    ;DMA transfer example ... this mean that once the DMA enable has been sent, it ...
    glancaster glancaster April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... will reset then after new DMA seqence programming can be send ... incorrect values do DMA chip. For example: if ... reset is ignored. In original Z80 DMA manual (book) is writen 6x ... /> 3) Last OUT (DMA),#87 = start DMA. In CONTINUOUS DMA mode Z80DMA stop ...
    velesoft velesoft April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... will reset then after new DMA seqence programming can be ... send incorrect values do DMA chip.[/QUOTE]

    ... br />
    [QUOTE]In original Z80 DMA manual (book)[/QUOTE]

    DMA),#87 = start DMA. In CONTINUOUS DMA mode Z80DMA stop ...
    glancaster glancaster April 2008 Development
  • Punch up! Bruce Everiss mauled by the internet over why Imagine collapsed.I couldn't see this posted here so I thought I would post it. It kept me amused for at least half an hour. Bruce Everiss on his blog claims piracy br…

    ... true: you can use the Z80 DMA to improve the Spectrum's ... has been done). However, the DMA mods that I've seen ... all of the "desolder the Z80 and put this daughterboard in ...
    Winston Winston April 2008 Sinclair Miscellaneous
  • Punch up! Bruce Everiss mauled by the internet over why Imagine collapsed.I couldn't see this posted here so I thought I would post it. It kept me amused for at least half an hour. Bruce Everiss on his blog claims piracy br…

    ... true: you can use the Z80 DMA to improve the Spectrum's ... has been done). However, the DMA mods that I've seen ... all of the "desolder the Z80 and put this daughterboard in ...
    Bad Horsey Bad Horsey April 2008 Sinclair Miscellaneous
  • Accelerated spectrum?Hihi Has anyone managed to replace the Z80 in a spectrum with a Z80B? Just wondering if it'd be possible to have a couple of crystals switchable to…

    ... />
    You can use the Z80 DMA to accelerate the machine - it ...
    Winston Winston July 2008 Hardware
  • Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.

    ... /> You can also use the Z80 DMA Chip, if you clone has ... one. DMA supports the fastest memory transports.
    LCD LCD October 2008 Development
  • MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…

    [quote=aowen;332721]Which hardware, besides the ZX Spectrum SE, has two multicolour videoRAMs?[/quote]
    I am not sure about russian clones, but this mode works on 48k speccy (and higher ;-) ) with Z80-DMA (MB02 or DataGear).
    omega omega January 2009 Development
  • MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…

    ... 48k speccy (and higher ;-) ) with Z80-DMA (MB02 or DataGear).[/QUOTE]
    DMA chip is capable of doing ...
    baze baze January 2009 Development
  • BSDOS 309 for MB02+ by DuskyI heard, there is a new version of BSDOS 309 for the MB02 disc interface coded by DUSKY (Nick: UB880D). I have three pieces of MB02 (including a prot…

    ... it could be faster with DMA, allowing something like Full screen ... />
    But all DMA software use new DMA routines in ZX ram ... without 8255, RTC, WD CONTROLLER, Z80 DMA. All this components can be ... /> 1)SRAM+EPROM+WDC+FDD+Z80 DMA

    2)SRAM+EPROM ...
    velesoft velesoft April 2009 Sinclair Miscellaneous
  • !!! Trdos Emulation On Zx !!![B]This is software emulator of TRDOS(betadisk). Yet is writed only for interface MB02+, but will ported to more other IDE interfaces with external r…

    ... /> - FDD driver with WD2797
    - Z80 DMA
    - up to 512kB batter ...
    omega omega May 2009 Development
  • An idea for a possible(?) new interfaceDue to the Spectrum's processor speed and the way the ULA works, there are a couple things (among others) that are difficult to do: -Gigascreen or a…

    ... in essence leaving the Z80 free to do something ... done away with a Z80 DMA chip. We are using ... Spectrum. Basically, with the DMA the ldir transfers could ... are some games transfered for DMA, demos. Go here, ... with it. Although, programming DMA is not the easiest ...
    Hood Hood October 2009 Hardware
<1234567…34>

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