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<1…11121314151617…34>
  • Integer RangesOK, I need a little help clarifying something. I am making good progress with the emulator so far - I've emulated most ADD, INC, DEC commands (as we…

    ... be represented using the destination register width.

    Eg:
    register.

    0111 1111 + 0000 ... in an 8-bit register.

    In hardware overflow is very ...
    Alcoholics Anonymous Alcoholics Anonymous June 2008 Emulators
  • 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…

    ...
    Disc Manager
    Dr Scroll - VTX711mk2
    Dragon Maze
    Datel Snapshot II: needs custom hardware (or check bypassing)
    Digital Prawn Digital Prawn August 2008 Games
  • Good 128k +2 emulator for Windows XPWhat emulator would you recommend for windows XP, to emulate 128k +2 Spectrum. I want to play Turbo Esprit like I did all those years ago! :-)

    ... loads of different model modes/hardware add-ons and I could ... had a spare ?20 to register it. Its nice tio have ...
    Dave Fountain Dave Fountain August 2008 Emulators
  • 'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…

    ... less than impressive on real hardware to say the least.
    scroll for each display completing before ... it can get on real hardware. And it's not good ...
    Woody Woody August 2008 Sinclair Miscellaneous
  • ZX128/+2 unrainer (HAL10H8)[url]http://velesoft.speccy.cz/zx/umbrella/umbrella.htm[/url]

    ... + disk I already need a hardware Unrainer because NMI menu knows ... and cannot correct its I register content.

    In between ... the FPGAs - bad times for hardware amateur who has doubt about ... may not work with the hardware Unrainer??? or should I look ...
    ingo ingo August 2008 Hardware
  • ZX128/+2 unrainer (HAL10H8)[url]http://velesoft.speccy.cz/zx/umbrella/umbrella.htm[/url]

    ... + disk I already need a hardware Unrainer because NMI menu knows ... and cannot correct its I register content.

    BTW: Have ... may not work with the hardware Unrainer??? or should I look ... call NMI and fixed I register manually(or automatic, if unrainer ...
    velesoft velesoft August 2008 Hardware
  • VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…

    ... see whether it was a hardware or software interrupt, so the ... remains set until the next hardware interrupt. I also noticed BRK ... the B-flag in any register so this won't work ...
    obo obo August 2008 Sinclair Miscellaneous
  • Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…

    ... precise usage of some Flag register flags that weren't well ... mostly because of the insane hardware they've added to those ...
    Dunny Dunny September 2008 Emulators
  • ANN: SpecEmu 2.7Go get it kids! [url]http://homepage.ntlworld.com/mark.woodmass/specemu.html[/url] :p

    ... value of the PC register in the register window by just using ... the IM mode via the register window. (If I'm not ... fails!

    7) The scroll buttons in the main memory ...
    Jimmy Jimmy September 2008 Emulators
  • ANN: SpecEmu 2.7Go get it kids! [url]http://homepage.ntlworld.com/mark.woodmass/specemu.html[/url] :p

    ... value of the PC register in the register window by just using ... the IM mode via the register window. (If I'm not ... />
    [quote]
    7) The scroll buttons in the main memory ...
    Woody Woody September 2008 Emulators
  • Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…

    ... SP=lines and all the scroll will look like POP HL ... and do it with less register loads. The overhead for this ...
    Matt_B Matt_B October 2008 Sinclair Miscellaneous
  • Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…

    ... order (effects like plasma, zoom, scroll), source address could be video ... opportunity to change only one register and the routine could be ...
    omega omega October 2008 Sinclair Miscellaneous
  • what were the things the Speccy architecture was good for?I don't know a hell of a lot about all the different computers hardware and I wanted to know if the way the Spectrum was built lent itself to certain…

    ... :

    So the C64 hardware scrolling, someone said it doesn ... to explain.
    c64 can scroll screen in a simple way ... finite time. so CPU says "scroll by 2 pixels" and when ... it "changes mind" and say "scroll by 4 pixels". as upper ...
    Fikee Fikee November 2008 Sinclair Miscellaneous
  • Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…

    ... OS X 10.4+ and hardware accelerated OpenGL.

    Changes ... the same as reading the register port (Philip Kendall; thanks, Mark ...
    Fred Fred November 2008 Emulators
  • Random access, file sizes and more.A few days ago Aowen mentioned that random access to saved data is not a problem. Here are my thoughts, doubts and suggestions regarding this subject…

    ... written for a specific internet hardware device.

    [quote]
    hardware (with a sw circular buffer ... /> ; message id passed in c register
    ; called function must preserve ...
    Alcoholics Anonymous Alcoholics Anonymous November 2008 Development
  • A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…

    ... work fast, you must not scroll whole screen, but coordinates of ... , from using ROM content or register R (don't forget it ...
    Shiru Shiru December 2008 Development
  • A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…

    ... /> Use QAOP keys to change scroll direction of starfield.

    register pair, it wasn't much ...
    Digital Prawn Digital Prawn December 2008 Development
  • I've been wondering...The Spectrum, CPC, and Apple II had no hardware sprites, so what were those 2D objects in their games?

    ... up and down you to scroll memory!

    I do ... TI-99 programming, and, IMHO, hardware sprites have held the machine ... you are limited to the hardware's 32 16x16 sprites.
    hardware to the extent that the ...
    Mark Wills Mark Wills December 2008 Sinclair Miscellaneous
  • Question about digitized sound and videoI searched the forums and couldn't find the answer, so here it goes. Regarding digitized sound: I remember reading an article long ago about a vid…

    ... behave the same on real hardware as it did under emulation ... in emulation because the emulated hardware is 'idealised' and is never ... could keep the sector count register 'topped up' without issuing a ...
    gasman gasman December 2008 Development
  • TAP filesI'm trying to figure out how to make TAP files and am none the wiser. Tried downloading Taper, got it working but it was one of the unfathomables. I …

    ... we then say that the hardware register size truly determines the bittedness ...
    rahtgaz rahtgaz January 2009 Emulators
  • Clearing the Carry flagI'm reading that sometimes I may want to clear the carry before using ADC or SBC. A simple AND A or OR B will do. However, as I see it, for 8-bit ar…

    ... bit into a register from incoming serial data from hardware - set the ... suck the bit into the register, is a fast way of ...
    Winston Winston January 2009 Development
  • Clearing the Carry flagI'm reading that sometimes I may want to clear the carry before using ADC or SBC. A simple AND A or OR B will do. However, as I see it, for 8-bit ar…

    ... bit into a register from incoming serial data from hardware - set the ... suck the bit into the register, is a fast way of ...
    rahtgaz rahtgaz January 2009 Development
  • Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…

    ... parameter we need into the register pair HL.

    There ... needing to return via a hardware trap address), but these are ... unless you're dealing with hardware add-ons you probably aren ...
    Winston Winston January 2009 Development
  • DivIDE on Spectrum +3Hi all, Is it possible to use the DivIDE on the Spectrum +3 in 128K mode? I have the 'A' jumper set on the board, but my +3 resets into 48K mode wit…

    ... , it's possible to kill hardware with software (using a help ... with another hardware).

    *takes coat*[/QUOTE ... line are ignored => if register I=xx0xxxxx then in IM2 ...
    velesoft velesoft February 2009 Hardware
  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…

    ... doesn't.[/QUOTE]

    Hardware doesn't have to actively ... in order to register a 0. If no hardware responds at IM2 ... />
    As far as real hardware goes, a quick peak at ...
    Alcoholics Anonymous Alcoholics Anonymous March 2009 Hardware
  • Hidden Features In GamesI'm sure there was a thread like this somewhere - sorry, but I can't find it. Hidden stuff in games. In "Mikie" there is a hidden bonus in each of …

    ... to have written the Cobra scroll - Mr Owens the other dodgy ... emulator testing with the "R" register usage - if your emulator gets ...
    frobush frobush March 2009 Games
  • Hidden Features In GamesI'm sure there was a thread like this somewhere - sorry, but I can't find it. Hidden stuff in games. In "Mikie" there is a hidden bonus in each of …

    ... emulator testing with the "R" register usage - if your emulator gets ... for a cheap 4-pixel scroll - who knows? In fact, who ...
    dougburns dougburns March 2009 Games
  • ** New Game In Development **As one or two of you may already know, Jonathan (Joffa) Smith is currently developing a brand new Spectrum game. The program is called 'SAUCER' It'…

    ... easier to scroll on the GameBoy and it has hardware sprites. But ...
    frobush frobush April 2009 Games
  • ** New Game In Development **As one or two of you may already know, Jonathan (Joffa) Smith is currently developing a brand new Spectrum game. The program is called 'SAUCER' It'…

    ... fancy messing with code and hardware.
    You had to sign ... from memory using the HL register pair - with auto increment or ... GameBoys, which had slightly inferior hardware (timing differences). I had to ...
    frobush frobush April 2009 Games
  • Spectrum 128k +2b helpCan anybody help me. When i switch my spectrum on the screen is like a chess board with bits flashing. Any ideas anybody. The make is a zx spectru…

    ... 'm not one of the hardware experts, but the last time ... that needed repair. If you scroll down you'll see that ... link:

    [url]http://hardware.speccy.org/reparar.html[/url]
    zxbruno zxbruno April 2009 Hardware
<1…11121314151617…34>

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