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<1…11121314151617…34>
  • Help! Reverse engineering a Spectrum game[deleted]

    ... ). It save programming time and code space. I could go on ... throw in a halt to sync the frame whenever you feel ... 50hz interrupt to keep in sync. Hires colour was also interrupt ... find many methods within the code of Spectrum games to work ...
    ASM ASM October 2010 Development
  • 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…

    ... download link:

    [code]

    ; *MUST ... ; 28800 BAUD
    sync dec d
    jr ... nz,sync ; d = 0


    [/code]

    Here is the ... download link:

    [code]


    zx232 ...
    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…

    ... download link:

    [code]

    ; *MUST ... ; 38400 BAUD
    sync dec d
    jr ... nz,sync ; d = 0


    [code]


    ... br /> ret

    [/code]

    Please note that ...
    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…

    ... 38400 BAUD:

    [code]

    ; *MUST EXECUTE ... ; 38400 BAUD
    sync dec d
    jr ... nz,sync ; d = 0
    < ... br /> ret

    [/code]

    Here is a ... the data:

    [code]
    ; Calculate CRC.
    ASM ASM October 2010 Hardware
  • 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 …

    ... , it is actually frame sync'd so scrolling/paging up ... t used during editing code at all! The function ... Deleteing and inserting lines/code is spot on - no ... once an assembly of the code has been completed.
    Download code section and/or data ...
    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…

    ... port @ 57600 BAUD:

    [code]
    ; *MUST EXECUTE IN NON ...
    ld de,8 ; 39 (sync)

    bit in a ... nz,read
    ret
    [/code]


    Here is ...
    ASM ASM October 2010 Hardware
  • 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…

    ... to hand assember the test code as I couldn't write ... instructions, not BYTES.
    The code ROM is not on the ... bit definition is out of sync with the opcode map:
    ASM ASM October 2010 Development
  • Simple & Portible means to boost PC Soundcard Line Out?Hi Guys, My older computers were very good at driving a real spectrum's ear socket via their Line Out or Headphone socket. My new Dell's sound card…

    ... isn't actually trying to sync; it also samples much more ... going on.

    The code:[code] LD BC, 254
    loop ... BORDER + MIC
    JR loop[/code]

    The results can ... />

    BTW: The machine code for assembly is position independant ...
    BloodBaz BloodBaz November 2010 Hardware
  • looking for a tap2wav coded in Python, Perl, Ruby or Luasince some months i started this project - [url]http://nitrofurano.altervista.org/experimental/webcampictureson8bitcomputers/index.html[/url] the pr…

    ... ).

    Well, here is:[CODE]#!/usr/bin/env python

    # Add Sync pulses
    # * Sync Pulse - 667 T-states ... ()
    sys.exit(exit_state)
    [/CODE]Thanks again! :)
    SyX SyX January 2011 Development
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... as C code: this implementation has one FSM to generate sync signals ...
    mcleod_ideafix mcleod_ideafix January 2011 Hardware
  • Fuse: what do you want to see?An open brainstorm. If you had a team of programmers working on [url=http://fuse-emulator.sf.net/]Fuse[/url], what would you tell them to work on? …

    ... /> Can we solve this IF1 sync issue with a shared comms ... top of my head when code running in Fuse reads/writes ...
    csmith csmith January 2011 Emulators
  • Gigascreen - programming guideDoes anyone know of a programming guide for the 128K gigascreen screen mode, specifically a persistence colours table, some code (pref. C level or BA…

    ... need an interrupt-driven machine code routine to alternate the displayed ... TV refresh rate is in sync - but yeah, any emulator that ...
    gasman gasman February 2011 Development
  • Lerm Tape Utility CHi folks, These Lerm tapes are doing my head in. Through the years I've aquired lots and lots of samples of these, but never been able to make a cl…

    ... just a TYPE to identify code blocks. This isn't present ... , certain pause requirements or the SYNC or BIT values are wrong ...
    Andrew Barker Andrew Barker April 2011 MIA/STP/SDP
  • Microvitec 1431 MonitorI've been lucky enough to get my hands on a Microvitec 1431 monitor, the one with a dedicated Spetrum input. This works great on a 48k with the in…

    ... signal

    [code]
    [B]128K ZX ... | -- 4 Composite sync TTL
    / \ 5 Vertical sync TTL
    5 ... | 8 Blue TTL
    [/code]

    so from ...
    Zetr0 Zetr0 April 2011 Hardware
  • So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…

    ... to generate the video sync because 3.5Mhz ... generates the right video sync for NTSC and the ... that generates the right video sync for PAL.


    [code] 48 Basic / 48K: 1261278 ... 1574523 (8 hours, 44 minutes)[/code]

    The ...
    chev chev April 2011 Sinclair Miscellaneous
  • Code Masters CD on ebay[url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330553816486&ssPageName=ADME:X:BOCOR:GB:1123[/url] He's selling it for ? 99.99 but accepts …

    ... TZX looks like:

    [CODE]
    1- A: -------------------- Length: 303 ... Length: 32333 Speed: 695%
    [/CODE]

    The first block ... strip out one pair of sync pulses as it will barf ...
    Andrew Barker Andrew Barker May 2011 Sales
  • Spectrum +2A/+2B/+3 to Amstrad (CPC) CTM644 Cable SchematicI've recently constructed one of these cables for a flea market purchased CTM644 colour monitor (CRT from a CPC) and the picture is fantastic. I boug…

    ... Maplin:
    [B]
    Maplin Code | Details[/B]
    FJ91Y | 1x ... cable, red, green, blue, composite sync, and ground. The cable does ...
    brownb2 brownb2 July 2011 Hardware
  • Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…

    ... can't find supporting
    code in the disassembly. This detection ... made
    at the second sync pulse and I was expecting ...
    lfaria lfaria August 2011 Hardware
  • I am currently watching.....This stems from a rant Mel did months ago on the currently listening to thread, and he suggested starting a thread like this to somebody (sorry can't…

    just watched source code. really good, nice saturnight movie, ... will read things out of sync. dubbing isn't much better ...
    mile mile September 2011 Chit chat
  • ZX80 and 81 hardware questionsI'm finding a lot of the documentation that is ostensibly about the hardware of the ZX80 and 81 to be primarily about the software. I was hoping some…

    ... (ie, interrupt acknowledge) triggers horizontal sync, with sources diverging on the ... -cycle timer triggers both horizontal sync and an NMI simultaneously.
    code is executed on a ZX80 ... in theory if you wrote code that told the Z80 to ...
    Thommy Thommy September 2011 Hardware
  • Need help with tzxingI recently got a copy of this Polish text game: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0006622[/url] I can't make a tzx of it howeve…

    ... simulate a pilot tone and sync pulses and a block of ... will be similar.

    [code]
    1- A: Program : ODDZ ... of Pulses Length: 16
    [/code]
    Andrew Barker Andrew Barker October 2011 MIA/STP/SDP
  • Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …

    ... OUTing with precision timing in sync with the drawing ray and ... with the user? Using morse code and the beeper?

    tstih tstih October 2011 Development
  • SuperTape Version 1.2 Scheme ?Hi folks, As mentioned in another thread, I came across a tape (on-line most likely) called SuperTape Version 1.2. I think it might be a multi-plat…

    ... how the leader+sync+few bits look:
    [CODE]
    ...
    PULSE0 869
    [/CODE]

    This is ... guessing what the exact sync pulses durations were. The ... look like this:
    [CODE]
    PULSE 2168 9 ... OUT locations and the code around them to make ...
    Patrik Rak Patrik Rak October 2011 MIA/STP/SDP
  • SuperTape Version 1.2 Scheme ?Hi folks, As mentioned in another thread, I came across a tape (on-line most likely) called SuperTape Version 1.2. I think it might be a multi-plat…

    ... /> It shows but the SYNC pulses of 667 735, but ... see the results:
    [code]
    10 PRINT " ... usual 667 735 for the SYNC pulses.

    ... then repeats again.
    [code]
    PULSE1 510
    ... br /> PULSE0 437
    [/code]

    There seems ...
    Andrew Barker Andrew Barker October 2011 MIA/STP/SDP
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... its arguments get out of sync. (The parentheses aren't needed ... defined times for each op-code, which probably isn't the ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…

    ... this:

    [code] org 65000
    di ...
    end 65000
    [/code]

    Basically, a ... edge of the horizontal sync pulse.
    UPPER ... the Sinclair Spectrum):
    [code]
    org 23296
    mcleod_ideafix mcleod_ideafix December 2011 Hardware
  • Alkatraz protection systemI recently became interested in the Alkatraz protection system, a very widely used tape protection (a infoseek search returns more than one hundred r…

    ... the WAV) the pilot / sync tones are detected (or something ... 6460
    Sync 1 Pulse 714, Sync 2 Pulse 714< ... 6458
    Sync 1 Pulse 790, Sync 2 Pulse 632< ... 146
    Sync 1 Pulse 714, Sync 2 Pulse 714< ... /> I provided the source code so that anybody can check ...
    lfaria lfaria December 2011 MIA/STP/SDP
  • Create a new microdrive cartridge image formatHi there, I'm working to emulate the IF1+Microdrives in JSpeccy.I've found what the "classic" MDR format ins't capable to store all the required inf…

    ... much more complicated because the code must "invent" while reading the ... signals during writes and GAP/SYNC signals during reads, the Microdrive ... tape file.

    The SYNC signal is another history that ...
    zx81 zx81 December 2011 Emulators
  • Alkatraz protection systemI recently became interested in the Alkatraz protection system, a very widely used tape protection (a infoseek search returns more than one hundred r…

    ... .s. + check basic header and code .. header 20 bytes .. :)[/QUOTE]
    sync (like some previous files) of ...
    lfaria lfaria December 2011 MIA/STP/SDP
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... always value 255 and game code wait in cycle). Exist modified ... use reading port 255 (screen sync) and game speed is out ... change to #3B). But game code decompression begin after start game ...
    velesoft velesoft January 2012 Games
<1…11121314151617…34>

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