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<1234567…34>
  • Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …

    ... . The normal screen is in bank 5, whilst the shadow screen is ... in bank 7. Note that this does ... and 0x7fff, which is always bank 5.

    Bit 4: ROM ... 48K BASIC.

    Bit 5:If set, memory paging will ...
    bverstee bverstee April 2010 Hardware
  • +2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…

    ... RAM are banks 1,3,5,7

    banks are ... following pair positions?

    BANK 1 IC's 18-26 ... IC's 20-28
    BANK 5 IC's 22-30
    BANK 7 IC's 24-32< ...
    xaris_sm xaris_sm March 2013 Hardware
  • Enable 128kB paging in emulatorFrom Zx Spectrum documentation ([url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]) [CODE][SIZE="1"]When memory is being pag…

    ... . The normal screen is in bank 5, whilst the shadow screen is ... in bank 7. Note that this does ... and 0x7fff, which is always bank 5.

    Bit 4: ROM ... .

    [COLOR="Red"]Bit 5: If set, memory paging will ...
    Ralf Ralf June 2013 Emulators
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... works correctly
    ld b, 5 ; Bank 5
    ld c, 0 ; Screen ... screen
    ld b, 7 ; Bank 7
    ld c, 8 ...
    pointblnk pointblnk August 2016 Development
  • 128k memory musingI've been pondering on the 128k memory thing a bit, and it's just bloody stupid. The 64k memory space is divided in four chunks. One is always los…

    ... /> - bank 1
    - bank 2 always resident
    - bank 3
    - bank 4
    - bank 5 ... screen / always resident
    - bank 6
    - bank ... time. The extra space in bank 5 (which is always resident) will ...
    Sol_HSA Sol_HSA May 2017 Development
  • TAP creator for 128k —tapbas question, PASMO alternative?Hi I have always used pasmo to assemble and output with a loader using —tapbas However, this only works for 48k I want to be able to specify…

    ... specify in my assembler what bank I am using and auto ... something like

    .Org bank 5

    Incbin

    Org bank 6

    Incbin
    robpearmain robpearmain March 2019 Development
  • compatibility between ZX computers?Hey all, I'm new here :) I was wondering about compatibility between ZX computers. Is it possible to run a game made for ZX80 on a ZX Spectrum? Or a …

    ... normal screen memory Dr Beep - BANK 5 is.

    0 to ... hence the use of RAM 5 and 7 as the screen ...
    cyborg cyborg July 2003 Sinclair Miscellaneous
  • My first attempt at Gigascreen interlacingWonderful. Did some research on the port which controls memory paging and wrote a short BASIC programme to switch pages 5 and 7 in and out of the scr…

    The +3s has nothing to do with the trick I described. It works because the picture is interlaced. You will see half of the picture from ram bank 5 and half from ram bank 7.

    [ This Message was edited by: Fraser on 2004-05-03 14:24 ]
    Fraser Fraser May 2004 Development
  • 128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…

    ... reads the first byte of bank 5 by reading it via Memory ... so it doesn't need bank 7 paging in as it ...
    Unique Unique February 2005 Development
  • 128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…

    ... reads the first byte of bank 5 by reading it via Memory ... so it doesn't need bank 7 paging in as it ...
    cyborg cyborg February 2005 Development
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... far as I can see bank 3 is fine on my ... work fine. I still suspect bank 5 to be faulty at least ...
    Timppa Timppa September 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... and try changing the bank 3 bit to bank 5 (it's the ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • 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…

    ... br /> | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | Bank 5 | Bank 6 | Bank 7 |
    | |
    | |
    8000h +--------+
    | Bank 5 |
    | |
    | |
    | screen |
    Fikee Fikee February 2006 Development
  • 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…

    ... 3
    0=bank 5 is displayed
    1=bank 7 is displayed ... 16384 (bank 5) and 32768 (bank 2)
    so if you set bank 5 to ... /> [code]
    set bank 5 visible
    set bank 7 to be accessible ... to be visible
    set bank 5 to be accessible via 49152 ...
    Fikee Fikee February 2006 Development
  • Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…

    ... , though. Run your code in bank 5. Detect the +3 by attempting ... to switch to the 4/5/6/3 memory configuration, and ... to ROM/5/2/3, copy the ROM to bank 4 and ... your game to banks 5/6/3 ... , switch to 4/5/6/3 ...
    John Elliott John Elliott March 2008 Development
  • Game engine design, graphic format?Having never written a game engine before, I'm in need of a little advice on the best way to store the game map. Its 512 x 896 map, 4-way scrolling,…

    ... option (ie: bank 3 at the top and bank 5 in as normal ...
    Jimmy Jimmy November 2008 Development
  • MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…

    ... (0x0000 and 0x2000) in Bank 5 and Bank 7 of 128 RAM. That ...
    Mister Beep Mister Beep January 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…

    ... RAM is 4,5,6,3 (as page 5, screen, variables, ... initial loader would be in Bank 2 (according to the + ... to keep a buffer in Bank 2 (after the loader) ... to fill the whole 16k bank). [B]BUT[/B] then ... it won't get paged (bank 5), and some digging should provide ...
    rbsfou rbsfou July 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…

    ... my code into the top bank, as if DOS is ... to dos (repeat until upper bank is 'full' / my object ... dos routines from the upper bank (as ram page 7 ... and reclaim some space in bank 5?

    Thanks for ... , but working around the bank switching seems to be hell ...
    rbsfou rbsfou 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…

    ... switch in the correct RAM bank to the top 16K ... 3 in top bank (ie load to ROM/5/2/3 configuration ... dos routines from the upper bank (as ram page 7 ... the top 16K (any arbitrary bank number), if you get it ... and reclaim some space in bank 5?[/QUOTE]

    As ...
    glancaster glancaster August 2009 Development
  • A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…

    ... -shifts for the bank 5 screen (address 0x4000) in bank 0, and the ... bit-shifts for the bank 7 screen in bank 2 (address 0x8000 ...
    ajmoss ajmoss July 2010 Development
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... ;512 kB memory
    D7 = bank 5 ;1024 kB memory

    D6 = unused
    D7 = bank 5 ;1024 kB memory
    [U ... ;512 kB memory
    D2 = bank 5 ;1024 kB memory

    D2 = bank 5 ;1024 kB memory

    velesoft velesoft August 2010 Hardware
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... the non-screen area of bank 5 (so you can write it ...
    chev chev August 2010 Hardware
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... your screen writing routines in bank 2. Page the screen ... 0xc000. Store the data in bank 5 at 0x4000. When the ... the screen and page in bank 0 to do any ... put the interrupt routine in bank 2 as well. That ... data (after the screen in bank 5). You could use even ...
    chev chev August 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…

    ... /> | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | Bank 5 | Bank 6 | Bank 7 |.....
    | |
    | |
    0x8000 +--------+
    | Bank 5 |
    | |
    | |
    | screen |< ...
    ZXZaber ZXZaber October 2010 Hardware
  • New TR-DOS utilities (2010)[url]http://velesoft.speccy.cz/other/trdos-utils-2010.zip[/url] This archive contain new convertors for PC: [B]SNA2SCL[/B] - convert SNA snapshot t…

    ... decompressing ... done
    RAM page 5 reading and decompressing ...
    File ... \WORK\z802scl.c, line 785 : Bank 5 overflow !

    Did anyone ...
    -Micky -Micky December 2010 Sinclair Miscellaneous
  • New TR-DOS utilities (2010)[url]http://velesoft.speccy.cz/other/trdos-utils-2010.zip[/url] This archive contain new convertors for PC: [B]SNA2SCL[/B] - convert SNA snapshot t…

    ... decompressing ... done
    RAM page 5 reading and decompressing ...
    File ... \WORK\z802scl.c, line 785 : Bank 5 overflow !

    Did anyone ...
    velesoft velesoft December 2010 Sinclair Miscellaneous
  • Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…

    ... bytes
    ; 6. Load bank 3 at 5:7000: 0x0400 bytes [skip ... bytes
    ; 9. Load bank 5 at 5:6900: 0x1700 bytes
    ; ... bank 5 at 5:6900: 0x1700 bytes
    ;
    ld bc,5 ;File 0, bank 5 ...
    ;
    ; Ca. Load bank 7 at 5:4000: 0x1800 bytes
    John Elliott John Elliott January 2011 Games
  • +2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …

    ... (Out) - Bits 0-2: RAM bank (0-7) to page into ... 0 (normal display file in bank 5), 1=SCREEN 1 (shadow display ... file in bank 7).
    ; Bit 4 : ... 48K Spectrum]
    ; Bit 5: 1=New key press code ...
    jp jp January 2011 Games
<1234567…34>

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