World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.013s
<1234567…34>
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... address range. A13 of the ROM is [I]not[/I] ... A13 of the Spectrum expansion bus.

    It ... A13 on the rom bus is from the speccy bus, It comes ... disciple would have different rom and different pal's ... . We will need the rom compatible with the 128K and ...
    Severino Severino February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... A13 on the rom bus is from the speccy bus, It comes ... url]

    The rom is a 28C64, a 8kx8 ... tracks, A13 to the rom is indeed connected to pin ... the disciple would have different rom and different pal's ... . We will need the rom compatible with the 128K and ...
    zub zub February 2013 Hardware
  • ZX81 internal RAM board?Just a quick question to Zorn (amongst others). What would the issues be with fitting one of Zorn's RAM boards into an unexpanded ZX81? Seems to me…

    ... use existing patterns in the ROM. So called Pseudo Hi-Res ... replace an echo of the ROM between the 8k and 16k ... be connected to the ROM bus, not the expansion bus.
    [/LIST]
    1024MAK 1024MAK October 2014 Hardware
  • Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…

    ... are from the main ROM, not floating bus (ULA/FFh), of a ... hardware automatically unpages the shadow ROM. As the RET instruction ends ...
    ld (5cedh),hl
    rst 8
    db 32h ;CALL ...
    mcleod_ideafix mcleod_ideafix June 2011 Emulators
  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…

    ... /> - shadow OS / by rewiring RST 0x00 /,
    - ROM extensions,
    - IM1 routines ... check the ROM code at location 0x0028 (=target of RST 0x28 call ... therefore hook into RST 28.

    QUESTION: disclaimer ... ROM overwrites address ...
    tstih tstih July 2014 Development
  • Wanted Software to Swap for Rom Carts ;)Wot I have for grabs is 4 Complete ROM Carts which I will swap for my wants below Horace [url="http://www.cornishdavey.dsl.pipex.com/4.jpg"]http://w…

    ... for grabs is 4 Complete ROM Carts which I will swap ... /> Self Destruct

    Bubble Bus
    Classic Axiens
    Classic ...
    Cornishdavey:)) Cornishdavey:)) February 2004 Wanted
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... spare space in the ROM as a table of ... the first byte of the ROM (DI, 0xf3) would cause ... there is a RST n on the data bus, it takes ... a bug in the ROM's NMI routine. It ... was intended that the ROM would jump to the value ... was reversed in the ROM, so it would jump ...
    Philip Kendall Philip Kendall July 2004 Development
  • ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …

    ... calling a routine in ROM-1 from ROM-0 so that when ... the routine in ROM-1 executes a RET instruction ... assume routines in ROM-0 will use a RST instruction (it doesn ... address of the routine in ROM-1, which means the paging ...
    chev chev January 2006 Development
  • Developing the Spectrum ROMI'm working on some Z80 assembler for a Z80-based single board computer that I'm building. For the things that don't poke my hardware, I'm using a Sp…

    ... the code for the Spectrum ROM was being developed, presumably in ... of thing? Even if the ROM is only 16K, that's ... LEDs on the address/data bus and control lines of the ...
    Winston Winston December 2006 Development
  • Monitor/debugger that doesn't use the Speccy ROM?Was there ever a Spectrum monitor/debugger released that didn't use the ROM, for key input and character output routines? The reason I ask is that i…

    ... that didn't use the ROM, for key input and character ... appear to use the standard RST 10 for character output, but ...
    glancaster glancaster February 2007 Development
  • A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…

    ... off the edge connector traps RST #8. For instance, the ... 1 pages its rom in when it traps an RST #8 - ... in their own ROM to avoid the bus being crowbarred by ... to trap something other than RST#8. (Does the ... hardware jumper that disables RST#8 traps and instead ...
    Winston Winston October 2007 Hardware
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... most of the address bus to facilitate bus indirect mode. According to ... supports two parallel modes - bus direct mode (where the chip ... do two LDIRs if necessary). Bus direct mode means accessing registers ... the eventual ethernet board's ROM and RAM, and then only ...
    Winston Winston November 2007 Hardware
  • It's a trap!So I got a CPLD (not the eventual one I want to use for the ethernet project - rather, one I actually have here and now, an XC9536 in a PLCC44). And…

    ... />
    Additionally, whenever our ROM is paged in, A15OUT is ... the beginning (in the Spectrum ROM, 0x007C contains a RET ... CALL instruction on the data bus (i.e. decode CALL ... Complete Spectrum ROM disassembly" especially with regards to RST 8 traps.< ...
    Winston Winston December 2007 Hardware
  • Bizarre stuff in Interface 1's shadow ROMAccording to the Complete Shadow ROM disassembly, the function that exits back to the BASIC interpreter after interpreting IF1 commands is this: [co…

    According to the Complete Shadow ROM disassembly, the function that exits ... Return address to main ROM is
    05CC RST 18,CHKSYNTAX STMT ... />
    Now look at the RST 18 routine:

    [ ... what's REALLY in the RST 18 routine? The disassembly contains ...
    Winston Winston March 2008 Development
  • 128 ROM paging alternativeWould this work (with the appropriate code in each ROM)? [code] ; 128 rom paging routine ; use rst 28h with call address stored after restart ;;rom…

    ... /> [code]
    ; 128 rom paging routine
    ; use rst 28h with call ... next instruction after the original rst
    ; and address
    [/code ...
    chev chev August 2008 Development
  • Rom upgrade(s) for the Humble spectrum +2 (not 2a or 2b)Hello there my fellow forum chummies, I was thinking today, after reading all this lovely rom burnery stuff, is there a way I could update the ROM o…

    ... , after reading all this lovely rom burnery stuff, is there a ... way I could update the ROM on my +2.

    bus mastering when more devices are ...
    Zetr0 Zetr0 June 2009 Hardware
  • DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…

    ... for connection to new ZX BUS connector. PCB contain only ... possible connect to new ZX BUS any interface (interface 1, ... can't disable ZX rom (only DIVIDE PLUS can ... replace ZX rom with extra memory pages)< ... .speccy.cz/other/zx-bus-for-divide-plus-fixed ...
    velesoft velesoft November 2010 Hardware
  • using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…

    ... it possible to use the ROM's FP calculator to evaluate ... />
    stack A : stack B : rst $28 : divide : end_calc
    stack ... C : stack D : rst $28 : divide : add : end_calc
    rst $28 ... end_calc" sequence?
    Battle Bunny Battle Bunny March 2012 Development
  • ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …

    ... spectrum which must activate its rom (actually static ram) on NMI ... need to work with ROMCS bus line.
    However, i cannot ...
    ArtemKuchin ArtemKuchin April 2012 Hardware
  • DIVIDE versus ZX128 ROMDivide interface use hardware mapping of extra memory on this fixed points in 48rom: #0000 - power-on/reset/rst0/software restart #0008 - syntax erro…

    ...
    #0038 - im1 interrupt/rst #38
    #0066 - nmi ... often connect only 48rom(rom 1) after each reset ... use autodetection of zx rom type (detect if is ... mapping points in external rom memory. Also exist next ... ROM0, then this ZX128 rom can be compatible with ...
    velesoft velesoft February 2013 Development
  • Rotronics Wafadrive v.1.80 ROM - Corrupt or purposely broken?I've been digging around the Wafadrive v1.80 ROM (from [URL="http://zxspectrum.it.omegahg.com/_RO.htm"]here[/URL]) and can't decide if the ROM is cor…

    ... around the Wafadrive v1.80 ROM (from [URL="http://zxspectrum.it ... can't decide if the ROM is corrupt, or has been ... -code-error
    ;
    l_0d2b: rst $20
    defb $13
    ROM images to compare against, so ...
    jp jp July 2013 Hardware
  • RST hooks in OpenSE BASICHi, any possibility of OpenSE BASIC having RST vectors rewired to a small table in RAM containing jumps back to apropriate ROM locations? :grin: It i…

    ... possibility of OpenSE BASIC having RST vectors rewired to a small ... containing jumps back to apropriate ROM locations? :grin: It is an ... vectors that are located in ROM to user mode applications. (hint ... an alternative...is there any ROM left for a small monitor ...
    tstih tstih May 2014 Development
  • ROM Calculator TrigHello, These Christmas holidays I finally have time to devote myself a little to the speccy . I have a question about how the ROM calculator implem…

    ... a question about how the ROM calculator implements cosine.
    ... CALL GEN_ENT_1 ;In effect a RST 28H instruction but sets the ... approximation used in spectrum ROM just a simpler procedure.< ... CALL GEN_ENT_1 ;In effect a RST 28H instruction but sets the ...
    rtunes rtunes December 2014 Development
  • Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …

    ... problem with the pixel address rom routine at 8874.

    Going by the ZXSpectrum Rom Dissassembly book, I'm trying ...
    ld (hl),a
    rst 16
    ret[/code]
    RST 16 it comes up blank ...
    Tobo Tobo September 2015 Development
  • Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …

    ... to enable the uSpeech ROM is this Booty code ... br /> ld a,$11
    rst $10

    And ... intention is for the RST instruction to call address ... instruction above) the uSpeech ROM is executed. The Z80 ... in the ZX Spectrum ROM which looks like this:< ...
    inky inky October 2019 Hardware
  • NMI Routine and Restarts in a new 128K ROMI'm presently engaged in creating AGD 5 with the intention of making it a pair of 16K ROMs for the 128K/+2. I'm fairly sure that the vast majority o…

    ... my use of the RST slots, especially RST 8. I know there ... I'm open to suggestions. RST 0, 16 and 56 are ... grabs. RST 8 wasn't supported in the original ROM 0 as ... the delay routine in RST 0 overran ...
    jonathan jonathan July 2022 Hardware
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... this is a single-byte RST instruction that performs a ... the Z80 will execute a 'RST 0x38' which is a ... you can't change the ROM code there.

    ... since nothing drives the data bus when the Z80 is looking ... Spectrum has on the data bus means the Z80 will ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... spare space in the ROM as a table of ... the first byte of the ROM (DI, 0xf3) would cause ... there is a RST n on the data bus, it takes ... a bug in the ROM's NMI routine. It ... was intended that the ROM would jump to the value ... was reversed in the ROM, so it would jump ...
    Fraser Fraser July 2004 Development
  • Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …

    ... br /> These days the ROM is essential for the minigame ... in the ROM.
    [/quote]

    RST are fast ... the CPU. The RST instructions are one byte ... put them on the bus as that instruction can ... on the Spectrum. RST 16 (print) and RST 48 (calculator) ...
    Alcoholics Anonymous Alcoholics Anonymous March 2006 Sinclair Basic
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... 0x66 is located in the ROM.

    Maskable interrupts ... be a single-byte "RST n" instruction that effectively ... 0x38 lies in the ROM we cannot change the code ... on its entire data bus so that although nothing ... garbage on the data bus when the z80 looks ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott 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

HitBox

Word Docs Hits
rst 1.2K 2.5K
rom 15.6K 29.7K
bus 4.3K 6.5K

Related Threads

  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
  • Searching for correct Betadisk 48k TR-DOS v4.12 ROM (Save ROM via TRDOS-Prompt to Disk)Hi,<br /> <br /> I have two ROM-Files which should be read out from an original Betadisk 48 Interface TRDOS v4.12 (ROM-Size 8k).<br /> But when I …
  • CPU speed controller (SLOMO) + K-MOUSE + JOYSTICK + ZX BUS EXPANSION (3x throught zx bus)Anyone is interested of this hardware ?<br /> [img]http://velesoft.speccy.cz/other/km2016lp3d1.jpg[/img]<br /> <br /> It's horizontal version of K…
  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php<br /> <br /> I found the following code:<br /> [code]<br /> CHADD equ 23645 ; Location of…
  • New WoS CD-ROM Project[url="http://neuro.zensoft.net/woscd/"]http://neuro.zensoft.net/woscd/[/url]<br /> <br /> I'm about to embark on an ambitious project ... to create n…
  • Emulators and ROM'sHi - This is my first post here, although I have been visiting WoS for ages....<br /> I have been on quite a few multi-platform sites that offer down…
  • ROM cartridgeI forgot, I'm also after a cardridge to fit into my RAM Turbo interface, mainly to see if it works really. An ultimate one would be nice, but would …
  • Quiz VI - Trident on VESA Local Bus....Something to keep everyone busy while Arjun sorts out his caboodle of questions....<br /> <br /> Ok, 12 quick fire questions.. <br /> Some cryptic - …
  • Spectrum ROMI downloaded some text files (they are actually the spectrum ROM files but in text) which can be compiled using TASM (or soemthing). I read on WOS th…

Related Searches

  • betadisk rom
  • betadisk rom line
  • alternative rom
  • rom
  • rom defekt
  • rom substitute
  • rom spectrum 128k 2
  • floating bus
  • 2a new rom
  • forth rom
  • 128k rom
  • rom 128k pentagon
  • rst bus
  • rst bus reset
  • rst rom
  • rst rom bus
  • rom rst
  • rom rst socket
  • rst 38 rom disable
  • rst 38 rom

Copyright © 2024 World of Spectrum