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<1234567…34>
  • Problem with Page 7I've been experimenting with running code in page 7 (+3) from BASIC and I seemed to have got it sorted out but then it all went wrong. Firstly, I tr…

    ... experimenting with running code in page 7 (+3) from BASIC ... LD BC,$ffff : RET" in page 7

    So then ... POKE 23388,16+7: OUT 32765,16+7: PRINT USR 65368 ... POKE 23388,16+7: OUT 32765,16+7:
    FOR ... "LoadCODE" were now in page 7 starting at 65368 (ie. ...
    Battle Bunny Battle Bunny January 2013 Development
  • Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…

    ... don't use BASIC or +3DOS page 7 will not be corrupted.
    cyborg cyborg November 2003 Development
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... is corrupted in page 7. Page 7 is used as "scratch" in +3DOS, but I ... is no longer necessary, rebuild page 7 back in place and execute ... think that "corrupted" areas in page 7 would be small enough to ... can be used as a buffer).

    Can anyone explain ...
    Zup Zup December 2012 Games
  • So... you want to format your 3.5" as 720K eh?Well, i've been trying to get hold of an application to make proper use of my 3.5" +3 floppy disks but i haven't been able to find any. I stumbled up…

    ... ,HEAD0 ; Our sector information buffer
    LD B,18 ... br /> DISK DI ; Main +3DOS access subroutine - Disable interrupts before ... (C),A ; Page ROM 2 and RAM PAGE 7
    POP BC ...
    NaMcO NaMcO December 2008 Development
  • What memory pages are being used in a +3DOS disk operation?To make a long story short: what pages are in use by +3DOS while doing read operations from the disk drive? Now, for the details, for those interest…

    ... are in use by +3DOS while doing read operations ... loaded block into their right page. Then, the next block, ... the fact that page 7 is used by +3DOS (as stated in ... block to be loaded at page 7 is about 9K long: ... built the contents of page 7 from the part loaded at ...
    mcleod_ideafix mcleod_ideafix March 2011 Development
  • Unexpected issue with +3DOS port of Pro BMX SimulatorI'm continuing to port my tape-based games to 3-inch disk (you may have noticed my previous post about PSSST!). Today I started on Pro BMX Simula…

    ... which is loaded into RAM page 1 (at 0xc000), so ... load the music into RAM page 3 (updating the main ... RAM page 1. Naively, it looks to me as if +3DOS ... is using the start of page 1 for ... : just reference to RAM page 7 being used for temporary storage ...
    Georgeo Georgeo March 2018 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…

    ... trying to read files with +3DOS into memory.

    ... to setup +3DOS so it only uses page 1 for the ... it is to keep a buffer in Bank 2 (after ... , then after returning from +3DOS, page in 3/4/6, and ... is unavailable when calling +3DOS, as 7 is paged in here, ...
    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…

    ... if DOS is active, RAM Page 7 is here instead. I do ... that is to reserve a buffer within page 2, and call dos ... the upper bank (as ram page 7 is active then)....Gah!!!!
    3DOS, but the whole 'initialization' routine does need to fit into page ...
    rbsfou rbsfou August 2009 Development
  • IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…

    ... The caller passes a buffer pre-loaded with the first ... /> directory entries.

    Buffer format:

    Entry 0 ... = Number of completed entries in buffer, 0...n.
    (If ... /> +3DOS routines), DOS can only be called with RAM page 7 switched ...
    The_Bert The_Bert October 2013 Sinclair Basic
  • Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…

    ... +3DOS (and thus by extension the RAM Disc) use some of Page 7 ... as a scratch buffer anyway? If so ...
    AndyC AndyC October 2017 Sinclair Basic
  • Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…

    ... the BASIC ROM, AND RAM Page 0 paged in. This ... is placed in e.g. Page 4.[/quote]

    ... 3DOS (and thus by extension the RAM Disc) use some of Page 7 ... as a scratch buffer anyway? If so ... .
    Too bad the +3DOS does that thing to the ...
    The_Bert The_Bert October 2017 Sinclair Basic
  • 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…

    ... +3DOS interfere with the "shadow" screen area at the start of page 7 ... the +3DOS bootloader- which requires me to manually page in ROM ... of the 128k editor, if page 7 is mapped in at c000h ... already written (including access to+3DOS, though the documentation isn' ...
    rbsfou rbsfou January 2007 Development
  • Memory usageBrowsing the online documentation for the Spectrum I came across a peculiar discrepency. As we all know the start of the RAM is at 16384 which is whe…

    The 128k Print buffer would obviously be in the paged memory somewhere. The +3 I know uses page 7 as a scratchpad for +3 DOS.

    Either this answers my question - I want to use all the RAM for M/C anyway.
    cyborg cyborg November 2002 Sinclair Miscellaneous
  • voice sampling with ADCs and DACsHi sorry it's off topic, but I wonder if anyone can help with an electronics problem. I'm trying to build a project for A-level electronics, using an…

    ... the output through a simple buffer (such as a couple of ... 'Wiring and layout precautions' on page 7 of the Phillips datasheet. I ...
    Winston Winston November 2006 Hardware
  • How to call plus3dos from high ram?Hello. I'm working in basizx disk access in spectrum version. The problem is tha basizx code is loaded in addresses above C000h, and plus3dos must b…

    ... plus3dos must be called with page 7 mapped in that range, and ... necessary bankswitching and execute a +3DOS call.
    glancaster glancaster February 2007 Development
  • alternate BASIC ROMI've come up with a few patches to the standard ROM to make it use the 128 shadow screen by default. The ROM is reorganised as follows: RAMTOP is se…

    ... .

    [quote]Does basic page the screen in/out when ... to 0x4000 and the printer buffer is moved up to 0xdb00 ... be relatively trivial to only page the screen in when writing ... printer buffer to store additional system variables and uses RAM page 7 as ...
    chev chev October 2008 Sinclair Basic
  • 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…

    ... 3DOS interfere with the "shadow" screen area at the start of page 7 ... +3DOS itself does not use the alternate screen area in page 7 ( ... but the remainder of page 7 should be ... left for the exclusive use of +3DOS). ...
    glancaster glancaster 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…

    ... DOS is active, RAM Page 7 is here instead.[/QUOTE ... the call to +3DOS, but internally +3DOS will switch in ... ld c,3 ; use page 3 in top bank (ie ... upper bank (as ram page 7 is active then)....Gah ... paging and call the +3DOS routine. You just need ...
    glancaster glancaster August 2009 Development
  • Elite +3This is a patched version of ELITE that saves commander data on +3 disks (and +3e hard disks) and of course loads them back. Commander names can only…

    ... , transition from 0 in 7 page of memory occurs the automatic ... has gone further in 7 page is loaded into 7 page in a proper ... to page 7 when I make the +3DOS calls but then again page 7 is ... mandatory for +3DOS calls, the auxiliary ...
    d_kef d_kef October 2009 Games
  • Real Spectrum screen flicker with SCREEN$I've written a basic loader to simply do a 'load "" screen$' based video from a divide+ however I'm finding the Spectrum can't render a screens and a…

    ... bunch of stuff into page 7 which likely overlaps the ... the next screen into page 7 could crash 128 ... next screen into a buffer at, say, address 49152 ... routine should copy the buffer to the screen display ... frames to complete the buffer copy (around 140k cycles ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • +3 assembler questionI was wondering if anyone could give any suggestions as to how to get this bit of code working on the +2A/+3 in 128k mode. It works on the +128k/+2 i…

    ... following chapter, the guide to +3DOS:

    [quote]
    ROM ... . This variable is held in page 7 along with some of the ... editor and DOS variables. Page 7 will only be switched in ... is reset so that this page-switching and ticker-decrementing won ...
    John Elliott John Elliott August 2010 Sinclair Basic
  • 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…

    ... currently working on the +3DOS version so I can catalog ... the contents of +3DOS formated 3" discs... +3DOS needs page 7 banked at 49152 ... http://img808.imageshack.us/i/3dos.png/][IMG]http://img808. ... imageshack.us/img808/5735/3dos.png[/IMG][/URL]
    ...
    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…

    ... . I only finished the +3DOS version about six hours ago ... were both related to page 7 being resident for +3DOS. I've got ... mode and 1536 BYTES for +3DOS version.
    Windows Command Line ... 64K memory map.
    Catalog +3DOS formated discs returning the actual ...
    ASM ASM November 2010 Hardware
  • Upgrading the Humble Spectrum 128 +2 (Grey)Hello there my fellow WoS'ers I am at a subtle in-pass in my wants for one of my +2 motherboards. I received this mobo, DOA in a job lot from fleab…

    ... an idedos driver and a +3DOS filesystem each within 4k of ... etc, like the +3 does (page 7 iirc?)

    if you ...
    guesser guesser May 2011 Hardware
  • Is it possible to access the +3 disk drive via m/c in USR0 mode?Is it possible to access the disk drive of the +3 via m/c +3DOS calls when running in USR0 mode? I ask because I'm having an awful lot of trouble ge…

    ... 4
    or 7 ; select ram page 7
    ld ($5b5c ... be enabled before any +3DOS calls are made
    ... and $f8 ; select ram page 0
    ld ($5b5c), ... res 4,a
    or 7
    ld ($5b5c),a ... 7
    ei ; interrupts should be enabled before any +3DOS ...
    cmonkey cmonkey October 2011 Development
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... the page 7 usage in the "sysvarp7.def" section. The cache buffer code ...
    Battle Bunny Battle Bunny December 2012 Games
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    The error code from SET was "access denied". Because I was assigning buffers in page 3 I'd switched to page 3 earlier, and the +3DOS routines don't work very well without access to page 7 :oops: After switching back to page 7 they worked OK.
    Battle Bunny Battle Bunny December 2012 Games
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... ) is paged in. So as +3DOS is in the same "realm ... /> which sets +3 DOS and page 7 and sets "48K interrupt mode ... " ie it doesn't page the byte at 23388 on ...
    nuggetreggae nuggetreggae December 2012 Games
  • +3 BASIC DOS_DemoI got side-tracked while working on the Op.Wolf conversion and ended up writing this +3 DOS utility which provides most of the disk functions that mi…

    ... down the reserved areas by page and address range for ... DOS/RAM buffer extents
    REM 5: DOS workspace in page 7
    page 7 as I considered them less ... overall address range, p=page, a,z=page address range, g=GOSUB ...
    Battle Bunny Battle Bunny December 2012 Sinclair Basic
  • RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…

    ... 't used, then most of page 7 seems to be free. The ... consideration is the DOS/RAM buffer extents, initially occupying all of ... -31 are in page 1, 32-63 in page 3, etc. There ... 's a permanent one in page 7 at $e090.
    Battle Bunny Battle Bunny December 2012 Games
<1234567…34>

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