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Search Again :: Adv Search 1000 results in 0.022s
<1234567…34>
  • Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…

    ... which consisted of an 8K ROM providing assembly (excellent), forth ... PC register passes a particular ROM address when you type
    < ... /> I tried setting up an Interrupt 2 but MicroSource disables interrupts ... anyone managed to capture the ROM and if so, have ...
    Chris Chris August 2001 Emulators
  • ZX80 and 81 hardware questionsI'm finding a lot of the documentation that is ostensibly about the hardware of the ZX80 and 81 to be primarily about the software. I was hoping some…

    ... is loaded from an address comprised of an internal 3bit ... attempt to read outside of ROM address space then it'll ... Most suggest that the fetch address is either only partially populated ... a ROM read.

    M1 + IOREQ active (ie, interrupt acknowledge ...
    Thommy Thommy September 2011 Hardware
  • Interrupting emulation if Multiface isn't availableA few years ago I asked about how to exit to BASIC when the BASIC environment is still available and stable. Now I have a similar question... Certai…

    ... unavailable. If I want to interrupt emulation and return to BASIC ... emulation to jump a certain ROM address, effectively doing the same thing ...
    zxbruno zxbruno March 2012 Emulators
  • ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …

    ... 20ns. But the ZX Spectrum ROM chip timing shows that its ... to somehow wire ZX Spectrum ROM slot to some fast PC ... feed read the ZX Spectrum ROM address and feed it data contents ...
    tstih tstih June 2017 Hardware
  • Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…

    ... since ZShell doesn't support ROM-random generator I converted
    Alcoholics Anonymous Alcoholics Anonymous May 2006 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…

    ... register, W5100 mode register, W5100 address MSB, W5100 LSB, W5100 data ... in the last page of ROM address space (or perhaps last half ... , since the DivIDE traps the interrupt service routine and I'm ... ISR after handling the W5100 interrupt. I may just have to ...
    Winston Winston November 2007 Hardware
  • IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …

    ... Sinclair 48K ROM in our new ROM (this will cope with Interrupt, Keyboard ... /> We are creating our new ROM at address 32768. The BASIC bit ... , so we'll start at ROM address 1 (which is currently at ... which starts at $3200 (currently address $B200 in RAM).
    < ...
    Jimmy Jimmy April 2008 Emulators
  • Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…

    ... calling
    ; hl = interrupt routine address
    ; ints enabled on return ... INTERRUPTS...
    ;****************************************

    Interrupt: push af

    ld ...
    Hiss: ld hl,0 ; rom pointer

    Hisso: ld ...
    frobush frobush January 2009 Games
  • ZX80 and 81 hardware questionsI'm finding a lot of the documentation that is ostensibly about the hardware of the ZX80 and 81 to be primarily about the software. I was hoping some…

    ... attempt to read outside of ROM address space then it'll ... ]M1 + IOREQ active (ie, interrupt acknowledge) triggers horizontal sync, with ... triggered 16 cycles after after interrupt acknowledge; this isn't ... it'd receive a maskable interrupt and then a non-maskable ...
    Thommy Thommy September 2011 Hardware
  • Barn find #4I think this is some sort of backup device. Its got "007" on the motherboard and the mice have chewed the buttons. Will do a little research later in…

    ... by paging out the BASIC ROM (by forcing /ROMCS high), ... will not be able to interrupt the Z80 CPU.
    ... , the paging of the ROM will have no effect on ... a key, as the ROM address area is not being accessed ... held high so the BASIC ROM cannot be accessed). So ...
    1024MAK 1024MAK August 2013 Hardware
  • New game: SolarGun 1.0[img]https://dl.dropboxusercontent.com/u/75238938/solargun4.png[/img] [img]https://dl.dropboxusercontent.com/u/75238938/solargun5.gif[/img] (that g…

    ... 0x39 ; 0x39xx is a rom address with lots of ff's ... enable interrupts inside the interrupt handler routine. So ... /> Section "Interrupt Response"
    sub-section "Interrupt Enable/Disable"< ... will lockup forever, since interrupt handler never enabled interrupts ...
    RMartins RMartins March 2016 Brand new software
  • 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…

    ... [/url] which suggests checking ROM address 19 which will give 167 ... .[/quote]

    Checking ROM contents to determine model is ... spectrum model to determine the ROM size.

    On ... because it uses the ROM's interrupt service routine to test ...
    guesser guesser June 2017 Development
  • If you've got a real working MF128,IF1, and MDR combo can I ask a favour?So, if you do have a real Multiface 128, Interface 1, Microdrive and, oh yeah, a Spectrum (48k or 128k) that are all working, can I ask a favour...? …

    ...
    err_sp equ $5c3d ; address of item on machine stack ... equ $5ced ; jump to shadow rom address
    ;
    exx ; save ... return to basic address
    push hl
    exx ... /> exx ; restore return to basic address
    pop hl
    exx ...
    jp jp February 2008 Hardware
  • Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…

    ... br /> err_sp equ $5c3d ; address of item on machine stack ... filename.
    t_str1 equ $5cdc ; address of filename.
    ;
    ... code to call any shadow rom address
    ret
    ;
    ... ,filenam
    ld (t_str1),hl ; address of filename
    ;
    ; ...
    jp jp August 2009 Development
  • The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…

    ... bus, messing around with the interrupt routine address calculation.

    People ...
    mcleod_ideafix mcleod_ideafix August 2012 Development
  • Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…

    ... overlaps the second machine's ROM address space, and force it through ...
    joefish joefish April 2014 Hardware
  • Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…

    ... skim-read from an alternative address, so that it could be ... to intercept reads to the ROM address space, and treat them as ... able to place its screen address at least on any of ... across the ROM and lower 16K address spaces. (That the ROM occasionally writes ...
    joefish joefish April 2014 Hardware
  • How to automatically find the character set in a gameThis is all completely new to me, so please be patient. I've done some reading up on how character sets are handled by the Spectrum. I understand tha…

    ... understand that there is an address at 23606 and 23607 that ... to an area of the rom by default and which contains ... classic Spectrum font. However the address can be altered to point ... still points to the classic rom address even though it clearly doesn ...
    morph morph June 2017 Development
  • InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…

    ... address. This address is supposed to store the address of an interrupt routine; the address ... +1 to store its interrupt service routine address. A peripheral supplying id ... /I*256+2 for its interrupt routine address and this would conflict ...
    Alcoholics Anonymous Alcoholics Anonymous February 2005 Development
  • 42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…

    ... where stream 15's output address is you might be able ... and look for calls to ROM address 5633 which sets the current ...
    jonathan jonathan October 2005 Development
  • 42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…

    ... where stream 15's output address is you might be able ... and look for calls to ROM address 5633 which sets the current ...
    wilsonsamm wilsonsamm October 2005 Development
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... I get the schematix and ROM image?

    I ... am already using a modded ROM, so I think I ... don't lose "my original" ROM.
    Maybe I can even ... use a 32K ROM inside the Speccy so ... LOAD routines (by changing a ROM address line), in case I need ...
    Marcelo Marcelo November 2005 Hardware
  • ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…

    ... I get the schematix and ROM image?

    I ... am already using a modded ROM, so I think I ... don't lose "my original" ROM.
    Maybe I can ... LOAD routines (by changing a ROM address line), in case I ... The interface uses an altered ROM on the LOAD and SAVE ...
    Dr BEEP Dr BEEP November 2005 Hardware
  • Replacement ROMsSo, I've replaced a couple ROMs in my +3 to be a +3e. I used a couple of 27c256's, which has worked a treat. So if I wanted to replace the ROMs in …

    ... condition required to activate EPROM (ROM) chip for read:

    ROM address space will cause overload of ... activated at time - CPU and ROM). It will happen btw. every ... keyb. because of small Speccy ROM bug, but it takes little ...
    piters piters December 2006 Hardware
  • 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 …

    ... can get 11182d onto the address bus.

    ... BASIC ROM in, 2) calls an address in ROM, 3) pages MicroSource ROM ... ROM simply by (say) loading a 16 bit register with an address ... then calling the predetermined BASIC ROM address with the MicroSource still ...
    BloodBaz BloodBaz March 2007 Emulators
  • Possibly a little OT: Exporting ROM function addresses to the Z88DKOK, so I'm using the Z88DK. It's entirely possible that some documentation has bypassed me. But assume I have a function in ROM, say, at address 0xF0…

    ...

    and in the ROM address header:

    [code]
    Winston Winston April 2007 Development
  • Possibly a little OT: Exporting ROM function addresses to the Z88DKOK, so I'm using the Z88DK. It's entirely possible that some documentation has bypassed me. But assume I have a function in ROM, say, at address 0xF0…

    ... header containing the prototype and ROM address in each source file ... g option (create global definition address file). In this method you ... header file containing all your ROM prototype functions *with* the ... containing DEFCs for each ROM entry point and one ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • Interrupts - been a while !Not sure if this is the right place for this (1st post on WOS, but been a speccy user since Dec'84 :-o (yes I am that old ! :p) ), But I can't for …

    ... calling
    ; hl = interrupt routine address
    ; ints enabled on return ... INTERRUPTS...
    ;****************************************

    Interrupt:
    push af

    interrupt
    ld r,a
    frobush frobush March 2009 Sinclair Miscellaneous
  • Vote for your favourite loading border colourSo it is time for one more important voting! :razz: What is your favourite loading [B]border[/B] design? Since I guess most of us spent many many ho…

    ... or something. There was a ROM address you could call that would ...
    joefish joefish August 2009 Games
<1234567…34>

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