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  • ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…

    ... sd card clock follow the cpu clock, so everything is always ... ]
    I will have to test more toroughly later this week ...
    bverstee bverstee September 2013 Hardware
  • New game: Krunel[IMG]http://www.speccy.pl/images/news/krunel_00.png[/IMG] Game name: Krunel Type: logical Author/group: [url]speccy.pl[/url] Platform: ZX Spectrum …

    I test this game on SAM COUPE ... . Game run at 200% speed (CPU in ZX mode on SAM ... speed will correct also on CPU at 7MHz(turbo) and more ...
    velesoft velesoft October 2013 Brand new software
  • Retro Event 26 October - photo's etcYesterday the first Retro Event was held in Elst, The Netherlands. It was a succes, which counts for both console sales floors and homebrew area. Ge…

    ... to me (the pre-ordered test cart from Ren? and a ... programmers about all kinds of CPU's and (as he is ... 's instead of CPU's (he does not: CPU's are his ...
    bverstee bverstee October 2013 Sinclair Miscellaneous
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... /> ld bc, 0x8e3b ; prism CPU speed select
    out (c ... or 255
    and a ; test it
    ret m ; ... each_s_5:
    bit 0, c ; test quotes flag
    jr z ... stack
    call numeric ; test for digit
    call e_l_0 ...
    chev chev October 2013 Development
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... I had no time to test anything.

    What if ... the interrupt occurs when the CPU is busy processing a long ...
    Einar Saukas Einar Saukas November 2013 Brand new software
  • +3 with dead expansion portI bought a +3 from a WoS user. So far, the computer works as expected, but when an interface (e.g. DivIDE (configured correctly) or Multiface3) is co…

    ... here. I removed the CPU Mostek TC8635 MK3880N-4 and ... something wrong with the Mustek CPU. I read the +3 ... t specify the type of CPU to be used. Was ... using a +2 CPU too daring?[/QUOTE]
    < ... .
    - When the video test (that screen with a colour ...
    Zup Zup November 2013 Hardware
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... Z80 CMOS CPU to the original NEC CPU solved the ... , so I present my recent test results here.

    ... put my Z80 CMOS CPU into an another Spectrum ... With the Z80 CMOS CPU the situation was even worse ... of the Z80 CPU with the different CPU types. The clock ...
    jimre jimre January 2014 Hardware
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... Spectrum. I had the old CPU and put it back to ... is worth the time to test it with that board, just ...
    jimre jimre January 2014 Hardware
  • ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…

    ... the rising edge of the CPU clock while MREQ is low ... next rising edge of the CPU clock when MREQ is high ... put it to a physical test.[/QUOTE]

    So as ...
    antoniovillena antoniovillena January 2014 Development
  • Very odd problemHmm, loaded up Sanxion on another 48k+ I have here only to find that when it had loaded there were no enemies on screen, furthermore on loading Atic …

    If a memory test checks out, you could try some tests normally used to test emulated Z80 implementations - this should rule out the CPU.

    [URL]http://mdfs.net/Software/Z80/Exerciser/[/URL]

    B
    balford balford January 2014 Hardware
  • Weird tv output by spectrum 48kI recently got a spectrum 48k and hooked it up to my tv. After finding channel 36, I get a really weird picture for the spectrum, why is that? Below…

    ... ... The giveaway was my test ROM's test pattern was appearing in ... on the screen, but the CPU was executing the ROM just ... to be something between the CPU and the ULA that was ...
    Spirantho Spirantho February 2014 Hardware
  • SpecBAS 0.802 Released!Hi folks - It's that time again when I release the latest round of features and bugfixes to SpecBAS :) New for this version are ZONEs which act ver…

    ... more dramatic - the slower the CPU running SpecBAS, the greater (in ... said, I'm about to test a [i]major[/i] update ...
    Dunny Dunny February 2014 Sinclair Basic
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... you could run the btime test as well. This would tell ... tested uses late or early CPU timings, which is important to ... "]the archive[/URL] so btime test selects reasonable defaults for Pentagon ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... from the early to late CPU timing as they heat up ... useful to run the btime test both before and after the ... want to run the minfo test as well for completeness, so ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…

    ... of one of the system test ROMs could be very informative ... analyser and watch what the CPU does step by step as ...
    Zorn Zorn March 2014 Hardware
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... a bit annoying kind of test).

    The way in ... is as follows:
    1. CPU has a priority; it reads ...
    introspec introspec March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... as follows:
    1. CPU has a priority; it ... accessed twice per 1 CPU cycle, making both the ... value for the CPU and value for the ... attribute address generation when the CPU is accessing the memory, ... have added the atime test for testing the attribute ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... custom version of the test with a different number ... accessed twice per 1 CPU cycle, making both the ... value for the CPU and value for the ... address generation when the CPU is accessing the memory, ... have added the atime test for testing the attribute ...
    introspec introspec March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... just be lost and the test will simply continue, but with ... a CPU, in which way it is very easy to test by ... demanding demos do not stress test the emulation enough. Shadow screen ...
    introspec introspec March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... a way to write a test exposing this, I'll probably ... D15.1 doesn't give CPU the priority for the first ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …

    ... I have seen a Zilog CPU reporting 33 while it was ... this, other than that the test loop must have become misaligned ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …

    ... 2 with D780C-2 CPU, works with Zilog CPU though.[/QUOTE]
    CPU sometimes samples the /INT correctly ... the /INT signal inside the CPU, and the propagation delays ... with the interrupt, rendering the test results questionable.

    ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... wire. I have tried the test but even this did not ... recently explained to be a CPU fault) has gotten worse and ...
    CornishManicMiner CornishManicMiner March 2014 Hardware
  • FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…

    ... - eating 15% - 20% of total CPU time when active. This is ... explained, if you want to test the accuracy of your serial ...
    zub zub March 2014 Development
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... ]Close up View of the CPU.[/B]

    [IMG]https ... [/IMG]

    [B]The CPU from a different angle[/B ... he has said he will test for me. Hopefully I can ...
    CornishManicMiner CornishManicMiner March 2014 Hardware
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... ,11/97)

    TEST : Iterations/sec. : Old Index ... ==============================LINUX DATA BELOW===============================
    CPU : ARMv6-compatible processor rev ... certain operations on the CPU that the closed ...
    Rephlex Rephlex April 2014 Chit chat
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... /96,11/97)

    TEST : Iterations/sec. : Old Index : New ...
    ==============================LINUX DATA BELOW===============================
    CPU :
    L2 Cache :
    OS ...
    Rephlex Rephlex April 2014 Chit chat
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... /97)

    TEST : Iterations/sec. : Old ... DATA BELOW===============================
    CPU : ARMv6-compatible processor ... DATA BELOW===============================
    CPU : ARMv6-compatible processor ...
    Zup Zup April 2014 Chit chat
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    The RAM test that the ROM program does ... is not a full memory test.

    Some faults ... fault).

    The Z80 CPU needs an area in RAM ... "upper" RAM fault causes the CPU to read incorrect data, and ... work out what the Z80 CPU is doing (to a limited ...
    1024MAK 1024MAK April 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... QUOTE=1024MAK;764954]The RAM test that the ROM program does ... is not a full memory test.

    Some ... ).

    The Z80 CPU needs an area in RAM ... upper" RAM fault causes the CPU to read incorrect data, and ... work out what the Z80 CPU is doing (to a ...
    Brian Brian April 2014 Hardware
<1…14151617181920…34>

Latest Posts

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