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  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... />
    ; *MUST EXECUTE IN NON-CONTENDED RAM*

    ld hl ...
    ASM ASM October 2010 Hardware
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... />
    ; *MUST EXECUTE IN NON-CONTENDED RAM*

    ld hl ...
    ASM ASM October 2010 Hardware
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... />
    ; *MUST EXECUTE IN NON-CONTENDED RAM*
    ; *CORRUPTS REGISTER 7 ...
    ASM ASM October 2010 Hardware
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... Sweevo's World, playing from contended memory at 25000.[/QUOTE]
    jp jp October 2010 Announcements
  • The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …

    ... shared RAM.


    contended defs 9472,0

    ASM ASM October 2010 Sinclair Miscellaneous
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... ]
    ; *MUST EXECUTE IN NON-CONTENDED RAM*
    ; *CORRUPTS REGISTER 7 ...
    ASM ASM October 2010 Hardware
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... ]
    ; *MUST EXECUTE IN NON-CONTENDED RAM*
    ; *CORRUPTS REGISTER 7 ...
    ASM ASM October 2010 Hardware
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... I started dealing with the contended memory. Then I focused too ...
    Madonna Mk 2 Madonna Mk 2 October 2010 Emulators
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... easy - disable those interrupts, avoid contended RAM and the full power ...
    ASM ASM October 2010 Development
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... three 16K memory banks are contended.

    I have completely ...
    ASM ASM November 2010 Announcements
  • What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3

    ... operations are accelerated/fast/not contended (fast IN/OUT instructions)
    contended). Snow effect in videoram is ...
    velesoft velesoft December 2010 Hardware
  • zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…

    ... a fault in the non-contended ram bank. of my +2 ... to 24 were the non-contended ram chips and IC 24 ...
    john58 john58 December 2010 Hardware
  • Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…

    ... of code that's in contended memory is the bit that ...
    trellis trellis December 2010 Development
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... means the entire RAM is contended, so you don't get ...
    chev chev December 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... /> Specifically, screen RAM - which is contended and with a compatible design ... always will be contended. A faster CPU will help ...
    Winston Winston December 2010 Hardware
  • Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…

    ... or 128/+2(grey) exist contended and uncontended ports.
    For ... , half of all ports will contended (slow down by ULA). ULA ... A14=1, ports is slow (contended)
    If A15=1 and ... is set, ports is slow (contended)

    Example of slow ...
    velesoft velesoft December 2010 Development
  • Other good oldschool computers?Hi! I'm a collector of games, and i looooooooove computers. I'm very much intrested in: -Amiga 500&1200 -Atari 8-bit -C64 -C16 -Spectrum -QL -CoCo -…

    ... C128 suffers from a heavily contended architecture that lowers its effective ...
    Matt_B Matt_B December 2010 Hardware
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... game code now resides in contended RAM. Also have my heap ... and therefore sprite data in contended RAM too. In high RAM ...
    Digital Prawn Digital Prawn December 2010 Development
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... infinite lives poke is in contended RAM, how embarrassing :D )
    Digital Prawn Digital Prawn December 2010 Development
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    Yes, I agree Timmy. Using contended memory is a fact of ... running time-critical sections in contended RAM, but for these games ...
    Digital Prawn Digital Prawn December 2010 Development
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... have odd banks contended and even banks non contended, and +2A/B ... banks 0-3 non contended and 4-7 contended. Is this right ...
    mcleod_ideafix mcleod_ideafix January 2011 Hardware
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... have odd banks contended and even banks non contended, and +2A/B ... banks 0-3 non contended and 4-7 contended. Is this right ... because of the differences in contended memory.

    And reading ... to the issue of the contended memory could the toastrack/+2 ...
    BiNMaN BiNMaN January 2011 Hardware
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... bank (all of it is contended), and the 32K RAM with ...
    csmith csmith January 2011 Hardware
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... bank (all of it is contended), and the 32K RAM with ...
    spodula spodula January 2011 Hardware
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... the +2A, with different banks contended looks like a pain in ... , but only the other two contended ones. Great.
    joefish joefish January 2011 Hardware
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... the +2A, with different banks contended looks like a pain in ... , but only the other two contended ones. Great.[/QUOTE]

    spodula spodula January 2011 Hardware
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …

    ... ] means that DE pointing to contended memory introduces 3 delays ?[/QUOTE ...
    Philip Kendall Philip Kendall February 2011 Development
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …

    ... ]

    if we forget contended memory, both routines should move ...
    Fikee Fikee February 2011 Development
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …

    ... sequence for both fragments spanning contended cycles to illustrate that. Try ... memory op tstates colliding with contended cycles. Try starting them at ...
    csmith csmith February 2011 Development
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... provides an A7 for the contended 64K, so its not entirely ...
    spodula spodula February 2011 Hardware
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Latest Posts

  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

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