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<1234567…34>
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    Hardware is the answer... or not ?

    From: [url]www.fruitcake.plus.com[/url]
    The RAM banks 4, 5, 6 and 7 (the contended RAM) are formed from IC6 - IC13, whereas the RAM banks 0, 1, 2 and 3 (the uncontended RAM) are formed from IC15 - IC22.
    kpuchatek kpuchatek April 2010 Hardware
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    ... ; Spectrum +2 (not +2A!) RAM test
    ; assemble & ... [*]"RAM fail: address xxxx, page x" (RAM I/O error)
    [*]"RAM fail: ... address 0000, page x" (ULA paging error)
    [*]"ROM fail ... : address 0000, page [0 or 1]" ( ...
    Battle Bunny Battle Bunny January 2013 Hardware
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    ... a,$00 ; start with page 0
    ld hl,$cafe ; location ... . Jumping to NOTOK1 would give ""RAM fail: address 0000, page x". Maybe ...
    Battle Bunny Battle Bunny January 2013 Hardware
  • SkoolKit 4.2SkoolKit 4.2 has been released. SkoolKit is a set of command line utilities for disassembling Spectrum software, into ASM format or into a bunch of …

    OK, so --ram load=1,24100 should do ... that the first block is 0 instead of 1? If I ... .py game.tap snap.z80 --ram load=0,24100 --reg pc=24100 ... anyway :( the load parameter should fail if I specify a block ...
    reidrac reidrac December 2014 Announcements
  • RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…

    ... 1ffd bit 0 is set, we have 4 different RAM pagings depending ... , one of the first 8 RAM pages (RAM 0..RAM 7) is paged at ... the number of the selected RAM page (0..31)?

    Pentagon ... the number of the selected RAM page (0..63)?

    Hopefully ...
    clausjahn clausjahn June 2008 Hardware
  • copying between RAM pagesSay I'm storing stuff in RAM pages 0,1,3,4 which gets used in 6,7 (which I am) and I might want to transfer up to 7kb at a time (which I do) and I do…

    ... I'm storing stuff in RAM pages 0,1,3,4 which ... to copy, say, 7kb from 0 to 7 when the two ...
    Battle Bunny Battle Bunny August 2012 Development
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... is used as the uncontended RAM pages 0-3
    When Spectrum ... the top portion of the RAM (0-3).
    If D2 is ... the top portion of the RAM (0-3).
    If D5 is ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …

    ... this where it resets the RAM to 0 and such things ).
    Saboteur Saboteur March 2004 Sinclair Miscellaneous
  • Looking for ramsoft MGT +D Software Compilation ArchiveOnce upon a time on the internet there existed a mgt +d archive on the ramsoft website with specially adapted multiload games as disk images etc. I …

    ... least, allows you to have RAM from 0-8191).
    Jmk Jmk December 2005 Games
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... /> Bits 0-2 RAM page (0-7) to ... FFFFh +--------+--------+--------+--------+--------+--------+--------+--------+
    | Bank 0 | Bank 1 | Bank ... | | |
    | | |
    0000h +--------+--------+
    RAM banks 1,3,4,6 ...
    Fikee Fikee February 2006 Development
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... the same but masked to RAM page 0? eg, I unset a ... is created at $0256 in RAM 0. I try to unset the ...
    icabod icabod July 2006 Emulators
  • Ways to use double buffering in basicI was meddling with woody's print stream code where you can print characters at any pixel location on screen. I was playing with 12 sprites, very ann…

    ... where the RAMDisk gets its RAM from? Anyone?
    [/ ... ROM in the 0-16k area, RAM page 5 in ... 32k-48k area and RAM page 0 in the 48k-64k ... (13467) are silicon disk RAM. Ramdisk files are stored one ... of silicon disk RAM. The silicon disk RAM is logically ordered ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Sinclair Basic
  • 16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.

    ... pointless at all (although 32K Ram Pack expansion emulation would be ... would actually address the 16K ram (shadow it) but clearly from ... differentate the 16K ROM and RAM (b15 = 0) and non-existent memory ...
    BloodBaz BloodBaz March 2007 Emulators
  • ZX Spin assembler - where am I going wrong?I'm trying to use the assembler in ZX Spin, but I'm getting error messages. Here's a screenshot of the first simple program I'm trying to get workin…

    ... so your code went into RAM bank 7, since you ... actually run a program, RAM bank 0 is paged into $ ... RAM0:0
    [/code]

    Since each RAM bank ... you need to assemble into RAM 0 at 49152 in +3 ... as a direct command: PAUSE 0 - then, while paused, assemble ...
    Marko Marko October 2007 Development
  • Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…

    ... it is actually loaded into RAM Bank 0.

    When you ... etc.. you always see Bank 0 inserted at $C000 - $FFFF.
    Digital Prawn Digital Prawn March 2008 Sinclair Miscellaneous
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... ?

    USED MB02+ RAM PAGES:
    0=bs-rom(modified ZX48rom ... set manual maximum of used ram (128/256/384/512 kB ...
    velesoft velesoft April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... [QUOTE]
    USED MB02+ RAM PAGES:
    0=bs-rom(modified ZX48rom ... bank 8, leaving banks 0-7 reserved for other ... manual maximum of used ram (128/256/384/512 ... detects the amount of installed RAM. I will simply modify ... installer so that banks 0-7 are marked as ...
    glancaster glancaster April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... pressed, a hardware switches to RAM page 0 - which can not be ... place a flag inside your RAM page which Hoods-NMI menu ... could switch automatically to your RAM page with task manager -
    ingo ingo April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... pressed, a hardware switches to RAM page 0 - which can not be ... place a flag inside your RAM page which Hoods-NMI menu ... could switch automatically to your RAM page with task manager -
    0-8 (or the Speccy ROM ...
    glancaster glancaster April 2008 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... is set MB rom page 0 + write protect (OUT 23,BIN ... /> Afterr NMI is set MB ram page 0 + write protect (OUT 23 ... write to BS-ROM(page 0) instructions PUSH AF , LD A ...
    velesoft velesoft April 2008 Development
  • Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …

    ... reset port 23 and set ram page 0 with write protect. If ... RESIDOS is install to other MB02 ram ... pages, is impossible use NMI (always call NMI from page 0 ... and user can't return to correct ram page ...
    velesoft velesoft May 2008 Hardware
  • RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…

    ... 7ffd bits 0..2 select one of 8 RAM pages, which ... , TS2068
    No RAM paging, but always fixed 48k ... and bit 0 of 0x1ffd puts RAM at 0x0000 ... number of the selected RAM page (0..31)?[/QUOTE]
    ... number of the selected RAM page (0..63)?[/QUOTE]
    ...
    Philip Kendall Philip Kendall June 2008 Hardware
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... ). In this area is divide ram page(0-3). For example you ... DIVIDE with 128 editor(rom 0). As first you must copy ... to same adress in divide ram page + rewrite all JP ... be set as 16kB RAM page 0 or 1 and can ... more systems. In one memory ram 512kB is RESIDOS+BS-DOS ...
    velesoft velesoft January 2009 Hardware
  • ANN: ResiDOS v2.25 and +3e ROMS v1.38 releasedA major new release of ResiDOS, v2.25, is now available! The most important new features are commands and functions allowing new extended streams an…

    ... version for original DivIDE (32kB ram), but only first two 16kB ... of BASIC ROM (eg RAM bank 0 for most interfaces) is ... br /> [LIST]
    [*]BASIC bank (0) switched in
    [*]ResiDOS bank ... /> [/LIST]
    [*]Finally, BASIC bank (0) is switched back in.
    glancaster glancaster July 2009 Hardware
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... as if DOS is active, RAM Page 7 is here instead ... will switch in the correct RAM bank to the top ... need to specify the RAM bank (0-7) you want in ... [CODE]
    ld b,0 ; file number 0
    ld c,3 ... the upper bank (as ram page 7 is active then ...
    glancaster glancaster August 2009 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... will switch in the correct RAM bank to the top 16K ... just need to specify the RAM bank (0-7) you want in ...
    rbsfou rbsfou August 2009 Development
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... 16) of the 2 RAM chips IC5 , IC6
    is permanent high ... pin on the other 2 RAM chips IC3, IC4 is pulsing ...
    xc8 xc8 September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... the sockets only the RAM IC5 and IC6 I see this screen ... on the sockets only the RAM IC3 and IC4 I see ... I ll get the new RAM ICs....


    Chris
    xc8 xc8 September 2009 Hardware
<1234567…34>

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