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<1…14151617181920…34>
  • Code structureHi all, I'd be interested in opinions on the neatest way to do this. I've got a print string routine in which 0-31 are reserved for control codes, …

    ...

    ZX7SOURCEDIR=~/dev/Z80\ src/ZX7_SourceCode/src
    RCSSOURCEDIR ... =~/dev/Z80\ src/RCS_SourceCode/src
    ... /> then
    #./"$Z80EXECNAME"-tap-file-compare.sh

    open $Z80EXECNAME ...
    dbolli dbolli August 2015 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... WOS. 95-99% will be z80 source, But nice to see ... 'm partially doing it to compare CPU speed and partly to ... may have sped up my Z80 code a little more. It ... . But you know how the Z80 is... smaller code isn't ...
    JamesD JamesD September 2015 Development
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... of the ROMs, I can compare them using a Hex editer ... lot about electronics (including digital, Z80 computer systems and power supply ...
    1024MAK 1024MAK October 2015 Hardware
  • Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…

    ... 90-120 seconds, the Zilog Z80 is hot enough to burn ... issue 2 to compare it to and the Z80 barely got warm ... .(Assuming the z80 temperature is comparable between use ... sticker was for on the Z80
    :-).....hmm....maybe ....

    lesoleil70 lesoleil70 November 2015 Hardware
  • 7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…

    ... in 1984 but if we compare that to the cost of ... start afresh, a 8MHz 128k Z80 system with a decent keyboard ...
    Mysterion Mysterion December 2015 Hardware
  • Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…

    ... from the work on the Z80 and TR6 you have just ... . Record each result. Once done compare them. If any are significantly ...
    1024MAK 1024MAK December 2015 Hardware
  • slightly different question - how long ago did you pack away the speccy ?if at all ;) personally I think I was about 19 when it, and all the games, went into storage - SNES and PCs etc took over. I'm 32 now, and only in …

    ... (read: mostly digitize, and then compare against copies downloaded from WoS ... . Just didn't do much Z80 coding in recent years. Currently ...
    RetroTechie RetroTechie February 2016 Games
  • (Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…

    [quote="Darkhog;52514"]
    - Regular IF z80 equivalent. e.g. If A
    Alcoholics Anonymous Alcoholics Anonymous April 2016 Development
  • (Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…

    [quote="Darkhog;52514"]
    - Regular IF z80 equivalent. e.g. If A
    GReW GReW April 2016 Development
  • What am I doing wrong here?[code]IF INKEY$=SCREEN$ (21,4) THEN LET SCORE=SCORE+1[/code] It's delivering a positive every time.

    ... $ value to a string and compare that to INKEY$, as suggested ... .zip
    in the file Strings.TXT. I'll have a ...
    Battle Bunny Battle Bunny May 2016 Sinclair Basic
  • Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…

    ... use PASMO, a command-line Z80 assembler that with the right ... PASMO on the current file (.Z80) to produce a file with ... my head what the command strings are to assign to the ...
    joefish joefish September 2016 Development
  • I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…

    ... a difference to the generated Z80 code.

    [quote="tstih ... C100" (for historical reasons), then compare the resulting binaries to generate ... of the high bytes. The compare between the first and third ...
    u6c87 u6c87 October 2016 Development
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... .[/i]) I need a nice z80 disassembly library that is written ... or a linked list of strings with instructions). Does something like ...
    tstih tstih November 2016 Development
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... .[/i]) I need a nice z80 disassembly library that is written ... or a linked list of strings with instructions). Does something like ... can use [url="http://www.z80.info/disz80.txt"]this table ... - http://www.z80.info/disz80.txt[/url]. n ...
    tstih tstih November 2016 Development
  • What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…

    ... br /> Commodore fans often just compare different CPUs at the same ... for timing, while the Z80 divides the external clock signal ... One slight advantage that the Z80 has over the 6502, is ... to the greater number of Z80 instructions and hence operations, code ...
    1024MAK 1024MAK January 2017 Sinclair Miscellaneous
  • What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…

    ... clearly slower than either the z80 or 6809.

    ... time. So in the marketplace, z80 relative performance rose in comparison ... comparing speed you have to compare chips made at the same ... current manufacturing technology. So a z80 made in 1976 was 4MHz ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Sinclair Miscellaneous
  • MIDI for spectrumI saw another topic for this in search but it didnt get any informative replies. I was looking through a magazine and found some MIDI stuff, keyboar…

    ... conversion chip (UART), so the Z80 CPU has to carry out ... rate for MIDI.

    Compare this to say, an Atari ...
    1024MAK 1024MAK February 2017 Sinclair Miscellaneous
  • 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); } …

    ... easiest sizes handled by the z80.

    Don't use ... (you will add/sub or compare rather than using it as ... unsigned by default. On the z80 you want unsigned as much ... as possible because the z80 is not as good at ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • Troubleshooting my +2To put this in context: a while back (i.e. late last year and earlier this year) I was looking to put together a compilation of modern Spectrum games…

    ... /> That's not a Zilog Z80 in there! A look around ... of a like-for-like "Z80 compatible" replacement that it's ... website is that a real Z80 has a slightly higher power ... another +2 or toastrack to compare with. Might this moving picture ...
    The Mighty Dopethrone The Mighty Dopethrone November 2017 Hardware
  • Please, convert your game to EP128The Enterprise is a Zilog Z80-based home computer first produced in 1985. It can simulate the specy screen, so most of the EP128 game is specy conver…

    ... the native Enterprise screen mode compare to the Spectrum's?.. Is ... pixel line without using any z80 power.

    [quote="kgmcneil ...
    Geco Geco January 2018 Brand new software
  • Kempston Mouse DriverHi Folks, Does anyone know the email of Chris Cowley who wrote the Kempston Mouse Driver in the WOS Archive? Many thanks Paddy

    ... />
    Could one of you Z80 experts assist please?

    CP 0 ; Compare offset with zero
    JR ... with offset
    CP 0 ; Compare offset with zero
    JR ...
    Paddy Coleman Paddy Coleman September 2018 Hardware
  • Kempston Mouse DriverHi Folks, Does anyone know the email of Chris Cowley who wrote the Kempston Mouse Driver in the WOS Archive? Many thanks Paddy

    That 'Z80 experts' part aside, :P Check ... well, they are using a compare with 88, which is (175 ...
    Hikaru Hikaru September 2018 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... it was the same old Z80 as the Spectrum, its ... want to compare performances between the 6502 and the Z80, then ... perhaps it's better to compare with ... fair to let the C64 compare with the Speccy, let ... it compare to something it can ...
    Timmy Timmy December 2018 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... (efficient use of memory) the Z80 wins, but often at the ... register to register operations, the Z80 wins.

    And so ... real world of trying to compare different computers, the actual hardware ... mapped video RAM that the Z80 CPU can directly access for ...
    1024MAK 1024MAK December 2018 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... 6502 is out-performing the Z80. If I can find a ... very careful using BASIC to compare different machines. BBC BASIC is ... to screen, graphics and sound). Compare this to the ZX Spectrum ... ... The CPC also runs the Z80 at 4MHz. However, the CPC ...
    1024MAK 1024MAK December 2018 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    Using BASIC to compare two machines is okay, as ... faster per MHz than the Z80.
    What is the difference ... the nature of how the Z80 works, it can be clocked ... latest code, but you can compare a few machines in 256x192 ...
    JamesD JamesD February 2019 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... register to register operations, the Z80 wins.

    ... real world of trying to compare different computers, the actual ... video RAM that the Z80 CPU can directly access ... over the 6502, and Z80 in most of the code ... , and 3.5 MHz Z80, but that's probably ...
    JamesD JamesD February 2019 Hardware
  • A snapshot to transfer converterI'm programming a tool that takes an snapshot file and convert it to a tape file that mimics those created with transfers. This is a long term projec…

    Some 10 years ago :

    http://pc.sux.org/tomcat/Z802TZX.zip

    Z802TZX

    Z80 Snapshot to TZX Tape Converter v1.2

    ->by Tom-Cat
    Tom-Cat Tom-Cat June 2020 Development
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