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<1234567…34>
  • SPIN's breakpoints - an overviewAs quite a few people have been asking how to set breakpoints on memory write etc. in SPIN, here's a description of the way the breakpoints work. Get…

    ... how to set breakpoints on memory write etc. in SPIN, here ... matter where PC is in memory:
    [code]
    ... a condition that reads memory, this can be done ... specify a read from memory. The address needn't ... on its own without checking memory / IO status but the ...
    Marko Marko November 2007 Development
  • Spin: "Error reading ListView1.Items.Data: Access violation"Hi, I've tried to run various versions of ZX Spin (I've also tried the latest 0.666) and many times I get this error: [INDENT]Error reading ListView1…

    ... address 004333C4 in module 'ZXSpin.exe'. Write of address 0000014C.[/INDENT]
    gio gio November 2007 Emulators
  • CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…

    ... state it's a [B]memory write[/B] cycle, just like the ... 't actually [I]modify[/I] memory, but I'm wondering whether ... commits some sort of "dummy write" (for example, writing the same ... the case, I guess that write should be checked against contention.
    Madonna Mk 2 Madonna Mk 2 March 2010 Emulators
  • Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…

    ... Speccy, as a DMA (direct memory access, in other words - ... the bus, written to screen memory, then released control.
    ... /> With DMA using the same memory write timings, this is reduced to ... bytes.

    * Memory to memory transfers
    On the Z80 ...
    Winston Winston November 2014 Hardware
  • Fuse tests - INC BC causes contention delayHi all, In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC): 0 MC 0000 4 MR 0000 03 4 MC 0001 …

    ... /> is one of MR (memory read), MW (memory write), MC (memory
    contend), PR ... (port read), PW (port write) or ... it need to read the memory to update the registers??
    garethadams garethadams July 2015 Emulators
  • Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …

    ... its own ROM on memory writes to address $0038 ... makes itself visible when memory writes to $0038 are ... the final 5 bytes of memory at $fffb. But ... does recognise the attempted memory write to $0038 and pages ... the real uSpeech respond to memory writes of $0038? ...
    inky inky October 2019 Hardware
  • New (?) auto-hacking methodFollowing a discussion with BadBeard on another thread, I think it would be appropriate for me to share something with the rest of the world (i.e. th…

    ... of saving a snap to memory, playing until a life was ... was known then a simple memory write breakpoint set on that address ...
    Woody Woody August 2003 Sinclair Miscellaneous
  • Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…

    ... lines specifying the initial memory setup. Each has the ... one of MR (memory read), MW (memory write), MC (memory contend), PR (port ... read), PW (port write) or ... specifying which bits of memory have changed since the ...
    Philip Kendall Philip Kendall July 2004 Development
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... memory, followed by 3 cycles of memory write and another 3 cycles of memory write ... 3 cycles of memory write and another 3 cycles of memory write.

    Alcoholics Anonymous Alcoholics Anonymous July 2004 Development
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... which T-states of the memory read/write are contended. Could've ... code fetch), M2 (memory read) and M3 (memory write) cycles is contended, and ... to the address of the memory accessed in case of M2 ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... the address in the second memory write. Changing the value of sbuf ... AND to a block of memory (for the double width scroller ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…

    ... selected).

    On a write cycle, the WR line on ... clock at T3 - the full memory write is 3 T-states) which ...
    Winston Winston December 2007 Hardware
  • Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…

    ... showed as 65535, but the memory didnt work. The reason it ... that its a very simple memory write and read test, that works ... corruption from where the ULA memory accesses "leak" into the CPU ... memory accesses.

    Give it ...
    Phu Phu December 2007 Hardware
  • Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…

    ... , along with small amounts of memory it should be 'emulatable'. Emulating ... shall say I have 3 memory translation tables - one for M1 ... fetches, one for memory read and one for memory write. Having the M1 ... I use 2 bytes of memory, so to increment the PC ...
    Jimmy Jimmy March 2008 Emulators
  • Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…

    ... shall say I have 3 memory translation tables - one for M1 ... fetches, one for memory read and one for memory write. Having the M1 ... I use 2 bytes of memory, so to increment the PC ...
    Dr BEEP Dr BEEP March 2008 Emulators
  • 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! :-)

    ... at address 004333C4 in module 'ZXSpin.exe'. Write of address 0000014C.
    0sAND1s 0sAND1s August 2008 Emulators
  • ZXSpin 0.62 Available nowAs promised (and only a [i]little[/i] past the deadline) here is the latest version of ZXSpin. Many bugs have been fixed, and a few new features add…

    ... at address 004333C4 in module ZXSpin.exe. Write of address 14C.". And ...
    0sAND1s 0sAND1s October 2008 Emulators
  • ZXSpin 0.62 Available nowAs promised (and only a [i]little[/i] past the deadline) here is the latest version of ZXSpin. Many bugs have been fixed, and a few new features add…

    ... at address 004333C4 in module ZXSpin.exe. Write of address 14C.". And ...
    LCD LCD October 2008 Emulators
  • ZXSpin 0.62 Available nowAs promised (and only a [i]little[/i] past the deadline) here is the latest version of ZXSpin. Many bugs have been fixed, and a few new features add…

    ... at address 004333C4 in module ZXSpin.exe. Write of address 14C.". And ...
    Marko Marko October 2008 Emulators
  • some debugger in emulators that is able to brakpoint when a mem address is accessed ?Is there a debugger (disassembler) available in some emulator that is able to stop (breakpoint) when a particular memory address is accessed ? For e…

    ... how to set breakpoints on memory write etc. in SPIN, here ... matter where PC is in memory:
    Code:
    ... a condition that reads memory, this can be done ... specify a read from memory. The address needn't ... on its own without checking memory / IO status but the ...
    Ralf Ralf November 2009 Emulators
  • Playing SID music on AY??Hello. Some time ago, with occasion of another thread, I was asking about possibility of making a very certain thing - a SID emulator for Spectrum …

    ... the chip could be (optionally) memory mapped at D4xx instead of ... would remove the need for memory write trapping checks in the 65xx ...
    obo obo November 2010 Development
  • Tau Ceti 128K on +3?does anyone know if there are issues with running [URL="http://www.worldofspectrum.org/infoseek.cgi?regexp=%5ETau+Ceti+-+The+Special+Edition$&pub=%5E…

    ... start menu "+3 BASIC" and write command "USR 0". Your ZX ... 48 basic with enable 128kB memory. Write LOAD "" and game will work ...
    velesoft velesoft November 2010 Games
  • MicroSpeech Entry PointsHello Hardware Guys, Do any of you have any information regarding the MicroSpeech ROM. In particular: 1) Do you know what addressess cause it to p…

    ... register.
    - Writing to memory at 1000h writes an allophone ... SP0256.
    - Writing to memory at 3000h sets intonation off ... .
    - Writing to memory at 3001h sets intonation on ... br />
    The two memory write addresses for intonation (3000h/3001h ...
    Woody Woody June 2011 Hardware
  • MicroSpeech Entry PointsHello Hardware Guys, Do any of you have any information regarding the MicroSpeech ROM. In particular: 1) Do you know what addressess cause it to p…

    ... SP0256 chip probably is memory mapped and may eventually ... register.
    - Writing to memory at 1000h writes an allophone ... .
    - Writing to memory at 3001h sets intonation on ... [QUOTE=Woody;541432]The two memory write addresses for intonation (3000h/3001h ...
    BloodBaz BloodBaz June 2011 Hardware
  • Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …

    ... .e. about exact time when memory write or read takes place inside ...
    Shiru Shiru December 2011 Emulators
  • T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …

    ... , macro tasks like read to memory, write to memory, acknowledge interrupt, etc, are ... hardware has to recognize when memory is read/written, for example ...
    Alcoholics Anonymous Alcoholics Anonymous July 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... 10 bytes of memory, as my newer direct screen memory write routine is ...
    snigfarp snigfarp November 2012 Development
  • The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…

    10 Goto Laptop
    20 Load Zxspin
    30 Write crap game!
    Rebelstar without a cause Rebelstar without a cause January 2013 Games
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... already into component parts, Read memory, write memory, fetch next instruction, Read IO ... , Write IO.

    I might ...
    Korinel Korinel June 2013 Emulators
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... already into component parts, Read memory, write memory, fetch next instruction, Read IO ... , Write IO.

    I might ...
    introspec introspec June 2013 Emulators
<1234567…34>

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