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<1…25262728293031…34>
  • Video ZX Spectrum+ 48k<span>Good day ... is a bit of time that I try to fix my zx spectrum ... I replaced the ram 4116, all electrolytic capacitors ... but the monitor loo…

    ... ULA's ability to access memory.

    It may be ... use of a lower RAM module from zx.zigg.net may ...
    balford balford May 2015 Hardware
  • Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc.&nbsp; There is an interesting…

    ... copy floats to/fro memory so you have ... but arrangement is different in memory.

    What ... for loading/storing to memory.  You have to ... difference between z88dk and modern C compilers).  So ... precision but I imagine modern math processors / libraries ...
    Alcoholics Anonymous Alcoholics Anonymous June 2015 Development
  • Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc.&nbsp; There is an interesting…

    ... but arrangement is different in memory.

    What that ... and for loading/storing to memory.  You have to have a ... advantages: you’re certainly saving memory in arrays of floats, if ... of precision but I imagine modern math processors / libraries have them ...
    zub zub June 2015 Development
  • Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc.&nbsp; There is an interesting…

    ... this. I’d have hoped modern compilers would be flexible enough ... advantages: you’re certainly saving memory in arrays of floats, if ...
    Alcoholics Anonymous Alcoholics Anonymous June 2015 Development
  • Are these cheap android tablets any good?I'm thinking of buying one these cheapo android tablets:- <a href="http://www.ebay.co.uk/itm/10-1-Google-Android-4-Dual-Core-Tablet-PC-Unlock-SIM-…

    ... 's got 4gb of onboard memory, and the OS takes up ... keeps popping up the 'memory minder' module to tell me to transfer ... is nicer (just that frigging memory issue!) and my wife's ...
    Grunaki Grunaki July 2015 Chit chat
  • Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc.&nbsp; There is an interesting…

    ... supports and the size in memory of floating point data. In ... of approach used by most modern C compilers works well, although ... quality of a lot of modern management provides little incentive for ...
    zub zub July 2015 Development
  • Hungarian notation for asm - Yes or No ?There is thing called hungarian notation - https://en.wikipedia.org/wiki/Hungarian_notation Basically it is all about using prefixed indetifier to i…

    ... I'm unable to define module API contract well enough to ... 've been working with paged memory a lot and when you ...
    guesser guesser July 2015 Development
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... memory emulation and no bugs and random crashes, like some "modern" emulators ...
    Pegaz Pegaz July 2015 Emulators
  • New 48K Spectum emulator on the Windows StoreHi, I've just uploaded a new "Free" Spectrum 48K emulator to the Windows Store, see: http://apps.microsoft.com/windows/en-gb/app/specwin48/4d54…

    ... format.

    Without modelling memory contention and proper CRT display ... half the game sprites. And modern multi-colour games like [i ...
    joefish joefish July 2015 Emulators
  • TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…

    ... ;830277"]
    There are some modern all-digital ones that struggle ... entirely possible that my lousy memory just fails me here and ...
    guesser guesser August 2015 Development
  • 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, …

    ... the most out of available memory and CPU. That means there ... tutorials, support forums etc. every modern programmer must have OCD.. :)) Obsessed ... . As well as having more memory...

    Sod that for ...
    Morkin Morkin August 2015 Development
  • 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, …

    ... DX, reusing the same memory area was necessary because the ... It even includes a full memory map to help understand where ... own local variables (ai_depth, ai_player), module "main" has its own local ... beginning of program in contended memory, so the entire program ...
    Einar Saukas Einar Saukas August 2015 Development
  • 40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…

    ... , wed aug 26 2015
    .module console

    .globl _con_putcharxy ... ]
    ;; video.s
    ;; video memory manipulation routines
    ;;
    ;; tomaz ... , thu aug 27 2015
    .module font6x6

    .globl ...
    tstih tstih August 2015 Development
  • IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…

    ... and POKE BASIC statements manipulate memory using the Z80’s ... other instructions that perform [i]memory access[/i] besides just LD ... , though. The sort of memory we’re talking about here ... is still true today, with modern hardware designs.

    ...
    zub zub September 2015 Hardware
  • IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…

    ... : much modern hardware has dropped the distinction between memory addresses and ... as a special range of memory addresses, just as they ... OUT” instructions, the computer’s memory controller (or PCI bridge or ... device) will provide a memory region that can be used ...
    zub zub September 2015 Hardware
  • IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…

    ... much modern hardware has dropped the distinction between memory addresses and ... space. To distinguish between memory mapped ports and actual ... another penalty associated with memory mapped io in those ... to separate io and memory space on modern cpus; it depends ...
    Alcoholics Anonymous Alcoholics Anonymous September 2015 Hardware
  • IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…

    ... space. To distinguish between memory mapped ports and actual i ... The Motorola 68000’s asynchronous memory bus was designed to accommodate ... to separate io and memory space on modern cpus; it depends on ... anything about how a modern virtual memory OS might work.
    zub zub September 2015 Hardware
  • IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…

    ... /> [/quote]

    On modern high-performance processors the decode ... identify which pages are memory (and therefore cached) ... tied directly to memory speed and memory speed fell behind ... anything about how a modern virtual memory OS might work.[/ ...
    Alcoholics Anonymous Alcoholics Anonymous September 2015 Hardware
  • Is there a ZX Spectrum Hardware manual?I'm quite new to the ZX Spectrum world, looking for a definitive guide to the ZX Spectrum hardware so I can really start to understand what's going o…

    ... in 2010, it's a modern book about the heart of ... diagrams, timing diagrams, logic tables, memory info, Z80 info, pixel generation ...
    namtip namtip September 2015 Hardware
  • Arcade Game DesignerTime I posted an update on this, I've been working on the next version - along with another developer who is writing the editors - since July. Wor…

    ... screens are incredibly expensive in memory terms so loading them from ... it was moved onto a modern platform.
    [/quote]It certainly ...
    jonathan jonathan October 2015 Development
  • Best Z80 Assembler for PC?There's probably already a thread for this so if somebody could please point me at it I'd appreciate it. If there isn't then please respond here wit…

    ... variable ends up in the memory, all I care about is ... only a handful of free modern z80 assemblers about. asz80 (sdcc ...
    Alcoholics Anonymous Alcoholics Anonymous October 2015 Development
  • Best Z80 Assembler for PC?There's probably already a thread for this so if somebody could please point me at it I'd appreciate it. If there isn't then please respond here wit…

    ... only a handful of free modern z80 assemblers about. asz80 (sdcc ... example of a hypothetical (?) program memory structure

    - 256-aligned ... sorts, at #FFFF (end of memory). We want the code section ...
    Hikaru Hikaru October 2015 Development
  • Best Z80 Assembler for PC?There's probably already a thread for this so if somebody could please point me at it I'd appreciate it. If there isn't then please respond here wit…

    ... to fit in the same memory space. On CP/M at ... to the size of available memory space. On the Spectrum you ... and unfortunately many of our modern z80 assemblers were influenced by ... than how assemblers in the modern day work.

    Speaking ...
    Alcoholics Anonymous Alcoholics Anonymous October 2015 Development
  • Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…

    ... that's of course a modern, pipelined cpu with 32 bit ... registers, (presumably) plenty of flash memory + RAM included, and much higher ... the ARM cpu. And flash memory! (if included, that is: game ...
    RetroTechie RetroTechie October 2015 Vega
  • Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…

    ... I could put in the modern SMD board that's around ... , or try Zorn's LRR module.

    If it works ...
    1024MAK 1024MAK November 2015 Hardware
  • Switched voltage regulatorIn the past a replacement voor the (hot!) 7805 has popped up a couple of times in various threads. As far as I know, Recom Power Inc. was always ment…

    ... "]Or one can buy a modern switch mode power supply (9v ... a circuit, or modern day add-on module that could be used ...
    Renegade Renegade 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…

    ... .
    The computers that use modern programmable logic are the ones ... and plug in a modern CPLD based module. However, the ROM may ...
    1024MAK 1024MAK November 2015 Hardware
  • Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…

    ... way I'd get working memory. As long as I ... A few days later the memory arrived when I realised I ... br />
    Zorn's Ram module plugged straight in and I ... see the amount of usable memory and I get 8649. ... specifically when I plug your module back in? I can ...
    namtip namtip November 2015 Hardware
  • Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…

    ... specifically when I plug your module back in? I can do ... though: (with that RAM replacement module inserted)
    a) ULA version ... instruction fetches, regular Z80 memory reads, Z80 memory writes, or ULA reads ...
    RetroTechie RetroTechie November 2015 Hardware
  • Issue 3B woesHello there, I currently have a Issue 3B for repairs around, it used to have broken upper and lower RAM, which I replaced with 41256-120 DRAMs (hac…

    ... :
    Have you run a memory tester from ROM?
    I ... as lower RAM (a LRR module) and they are getting screen ...
    1024MAK 1024MAK November 2015 Hardware
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