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<1…17181920212223…34>
  • z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…

    ... used, this would prevent someone from changing a subroutine but then ... likely you will have to read and write to Ram to ... now you suddenly have to read from RAM 200 times. To traverse ...
    slenkar slenkar April 2017 Development
  • z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…

    ... likely you will have to read and write to Ram to ... now you suddenly have to read from RAM 200 times. To traverse ...
    Einar Saukas Einar Saukas April 2017 Development
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... think) to follow the initialization from the point of the RAM ... , that doesn't sound normal from what little I know about ... the processor is attempting to read from memory. But why would /WR ... removing /M1, /RFSH and /WR from the trigger conditions, but it ...
    Mikelone Mikelone April 2017 Hardware
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... it as a target separate from the spectrum depends on these ... graphics still have to be read from memory whether it's done ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Sinclair Miscellaneous
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... it as a target separate from the spectrum depends on these ... game for a new hardware from scratch. That's not so ... graphics still have to be read from memory whether it's done ...
    Lethargeek Lethargeek May 2017 Sinclair Miscellaneous
  • New ZEsarUX 5.0Hi! ZEsarUX 5.0 is out! :) You can download it from the URL: https://sourceforge.net/projects/zesarux/ Finally I have succeded emulating Si…

    ... way, F keys are not read from the spectrum machine. These keys ...
    Luzie Luzie May 2017 Emulators
  • Beginner's z88dk help rqdI'm struggling to get my first z88dk C program to compile. My program is this: #include <spectrum.h> int main() { zx_border(INK_BLACK); } …

    ... zx) and it will read default options from file [url="https://github ... file. The default options are read from the OPTIONS line. Next ... options from one of the clib= lines will be read depending ... because it will read those pragma options from file "zcc_opt.def ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • Retro Game Comparison Blog.So, here's a shameless plug for my blog, which should interest some of you. Then again, it's not biased towards any particular system, so it might no…

    ... top of an old request from a friend of mine. I ... say, isn't pretty to read from the Spectrum gamers' point of ... matter, do have a good read! I'll try to get ...
    Skaepoy Skaepoy July 2017 Announcements
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... the contention scheme is different from the 48K (and I presume ... it 'appears' and can be read from the fb port is not ...
    Hikaru Hikaru September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... stripes fill the whole border, from the top till the bottom ... like the value #71 is read from the port #0FFD constantly, but ... understand if yellow stripes began from the first line of main ... begins reading of value #71 from the lines of pixels in ...
    weiv weiv September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    Well, it seems simple. Reading from screen memory leads to changing the value of internal ULA register, which is read from floating bus ports. Regardless of whether the screen memory is being read by processor or ULA.
    weiv weiv September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... This is done separately from the latter, and entirely ... br /> in a,(c) ;read the port again
    exx ... numbers show the values read from the port before (I ... 3. If the initial value read from the fb port, 'I', ... is not equal to that read after the operation, 'A ...
    Hikaru Hikaru September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... take it)
    - The value read from the fb port before 14368 ...
    Hikaru Hikaru September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... take it)
    - The value read from the fb port before 14368 ... /> It means that any reading from the contended memory, including instruction ...
    weiv weiv September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... the +2A/+3 behaves differently from the 48K/128K/+2. The ... reset, the port read returns the value currently read by the ULA ... the value that was last read from contended memory (usually, the last ... attribute byte read) and [i]not[/i] $FF ...
    Ast_A_Moore Ast_A_Moore September 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... the value that was last read from contended memory (usually, the last ... attribute byte read) and [i]not[/i] $FF ... ]
    5. Reading and writing from/to slow memory pages by ...
    weiv weiv September 2017 Development
  • HOWTO Best Pratice for formatting SD- / MMC-Cards and Image-Handling e.g. Tools for ResizeCould you please tell me your experiences with handling images of SD- and MMC-Memory-Cards for Emulation. I use Windows 10 32-Bit as PC-OS, but yo…

    ... of partition, this can be read from partition table (get starting sector ...
    ub880d ub880d September 2017 Emulators
  • Illogical operatorsI know it has always been this way but... 10 LET A = 10 20 LET B = 20 30 IF A = 10 OR B = 20 THEN PRINT " YES " That evals to true and prints…

    ... ?

    Another way to read it is: 'As long as ... these are true...'

    . Read from left to right.
    . check ...
    Luny Luny October 2017 Sinclair Basic
  • ZX Spectrum keyboards : all and everything about them and how can the Speccy keyboard be improved? This discussion can include of all the main types of Spectrum keyboard from the past (inc addon / aftermarket) , their strengths and weaknesses , …

    ... the program I wrote would read from it, and I put drivers ...
    Jonathan Harston Jonathan Harston November 2017 Hardware
  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…

    ... you to interpret the values read from the port and deal with ... a way that any value read when the program runs for ...
    Ast_A_Moore Ast_A_Moore November 2017 Sinclair Basic
  • Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …

    ... ] rely on reading a byte from ROM (although it hasn’t ... a,($5800) ;place a byte from contended RAM on the bus ... ,$0f
    in a,($fd) ;read from port $ffd
    inc a ... [/i] be $ff (obviously). Reading from the first attribute byte makes ...
    Ast_A_Moore Ast_A_Moore December 2017 Development
  • Why are most people dumb lemmingsWassup WOS, haven't made a thread of my own in a while, but here goes. I live in a city with a substantial public transport network and we have pl…

    That's the first ewgf post I've actually read from start to finish in ages without having to take 2 15 minute breaks somewhere in between :O
    dm_boozefreek dm_boozefreek December 2017 Chit chat
  • Some questions about the Timex TC2048/TC2068I have been doing some research about the specs of these 2 machines but I suppose it would be better to ask for advice in the forum since I have neve…

    ... . Some sw on the spectrum read from that port to see ula ... has two joysticks read through the ay chip). Aside from the small ...
    Alcoholics Anonymous Alcoholics Anonymous January 2018 Hardware
  • Some questions about the Timex TC2048/TC2068I have been doing some research about the specs of these 2 machines but I suppose it would be better to ask for advice in the forum since I have neve…

    ... . Some sw on the spectrum read from that port to see ula ... has two joysticks read through the ay chip). Aside from the small ...
    Black_Cat Black_Cat January 2018 Hardware
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... video data read. Hence the data that the ULA reads from RAM ... normal instruction fetch or data read or write by the CPU ... if attempts are made to read from IO port 7FFD (or any ...
    1024MAK 1024MAK February 2018 Development
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... if attempts are made to read from IO port 7FFD (or any ... /> Right, which is why reading from this port (these ports) is ...
    Ast_A_Moore Ast_A_Moore February 2018 Development
  • IN instruction on emulatorsHi everyone I wrote: 10 PAUSE 0 20 PRINT IN 63486 If i press 1, result is 190 instead of 254 (i used FUSE and Spin) If i press 2, 189 (253) i…

    ... key is pressed, the value read from the port is %1x111111 (ignore ... a 0, so the value read from the port will be %1x11110 ... are always high when you read from this port. Bit 6 (the ... used by the Spectrum to read from tape, so its state will ...
    Ast_A_Moore Ast_A_Moore March 2018 Sinclair Basic
  • SpecEmu startet with or without Adminrights uses different INI-File - Sugg.: INI File in SpecEmu-DirHi, when I start SpecEmu "as Administrator" or not "as Administrator" uses different SpecEmuWindow.ini-File in different locations: C:\Windows\Sp…

    ... location of winamp.ini is read from this paths.ini.

    Luzie Luzie March 2018 Emulators
  • SpecEmu startet with or without Adminrights uses different INI-File - Sugg.: INI File in SpecEmu-DirHi, when I start SpecEmu "as Administrator" or not "as Administrator" uses different SpecEmuWindow.ini-File in different locations: C:\Windows\Sp…

    ... location of winamp.ini is read from this paths.ini.

    AndyC AndyC March 2018 Emulators
  • SpecEmu startet with or without Adminrights uses different INI-File - Sugg.: INI File in SpecEmu-DirHi, when I start SpecEmu "as Administrator" or not "as Administrator" uses different SpecEmuWindow.ini-File in different locations: C:\Windows\Sp…

    ... location of winamp.ini is read from this paths.ini.

    Luzie Luzie March 2018 Emulators
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