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  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... using to detect RAM (and subsequently set the 23733 value), so I ... be confused.
    Now, that RAM upgrade *could* require the user ...
    skagon skagon October 2013 Hardware
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... a routine to check the ram value and the presence of the ... interface attached shows the free ram on the starting screen.
    ram upgrade really fits to my ...
    maskenlos maskenlos October 2013 Hardware
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... simple programme to test the RAM; the upper 32k begins at ... a loop that POKEs a value in addresses 32768 and above ... again, to verify that all RAM chips are working. Then, you ... do another "IN" and change RAM page and re-read the ...
    skagon skagon October 2013 Hardware
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... value to l
    ; ld a, 8 ; ROM 0, VRAM 1, RAM ... bc, (seed) ; get current value of seed
    call stack_bc_1 ... br /> call k_test ; key value?
    jr nc, s_ik_str_stk ; ... /> call k_decode_1 ; decode key value
    call bc_1_space ; make ...
    chev chev October 2013 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 48 BASIC ROM). The RAM page at the top of ... can only be called with RAM page 7 switched in at ...
    The_Bert The_Bert October 2013 Sinclair Basic
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... those at the top of RAM 0xd1ed to 0xffff. I placed ... ]

    I think the value still has to be in ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... high byte of top of RAM
    ld (de), ... p_ramt), iy ; set top of RAM
    ld hl, initpal - ... /> ld a, 25 ; scroll counter value
    sub (iy + _s_posn_h) ... ROM 1, VRAM 0, RAM 0
    out (c), ... br /> add a, e ; value to ASCII

    ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... rlc c ; double the value in C
    ld ... ; ROM 0, VRAM 1, RAM 7
    out (c), ... ; ROM 0, VRAM 1, RAM 0
    out (c), ...
    chev chev November 2013 Development
  • I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…

    ... , he suggests testing the lower RAM chips on a resistance meter ... those that fail a certain value ( around 13K if I remember ...
    DEATH DEATH November 2013 Hardware
  • ZX Spectrum Plus Versions.Did they ever do a 16K version of the Spectrum Plus? I have just got an early one (Issue 3), with a low serial number 003-037776, and it is fully po…

    ... would come up with a value between 32767 and 65535.
    RAM ICs are completely dead, therefore ... read, you can determine which RAM IC is at fault.
    Falco-F8L Falco-F8L November 2013 Hardware
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... you can set the flash value to 255 build up a ... single out command change the value to 0 and the image ... the sram to hold a value for each address in the ... rom, 2 and 3 upper ram

    bit 2 selects ...
    Basher Basher November 2013 Hardware
  • This is Tritone (new beeper music compilation)A Battle of the Bits music compilation! All made by nix./site, brightentayle and, most importantly, TK90X Fan! \ ^_^ / All the songs in here use a b…

    ... better if you use 128K RAM?[/QUOTE]

    No, it ... put the different RANDOMIZE USR "" value.

    One half of ...
    Crash Nicker Crash Nicker December 2013 Brand new software
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... blocks (similar to the lower RAM error symptoms).

    I ... the wire the system became unstable. Measuring at the ULA or ...
    jimre jimre January 2014 Hardware
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    A value of 32768 for P-RAMT ... very first byte of upper RAM and sometimes that is enough ... if it detects all upper RAM is faulty). However, I don ... bit 1 of all upper RAM and your test does suggest ... 4164 or all of upper RAM with one of these: [URL ...
    Zorn Zorn January 2014 Hardware
  • Graphics questionHello. I was wondering, does anybody here know of a method to display a large (as in, the better part of the screen) bitmap/raster image using ZX Sp…

    ... gets overwritten with an inconsistent value and it falls over. Patching ... do a copy in primary RAM - which is easy enough, I ...
    Battle Bunny Battle Bunny January 2014 Sinclair Basic
  • How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…

    ... integer value is used for the screen address. (or any RAM address ...
    slenkar slenkar February 2014 Development
  • R.E. in school.I was thinking about this the other day. In RE in secondary school in the 90's the curriculum over the 5 years consisted of. 1st day: discussion on …

    ... usually polite and don't ram my atheism down other people ... from converting somebody else :). Good value as far as I'm ...
    David Jones David Jones February 2014 Chit chat
  • Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…

    ... this will be a fixed value in the subroutine)
    call ... /> ld (hl),%00000100 ; the attribute value that will be set
    ram addresses per Y row for ... />
    [code]
    Y Colour ram X offset

    Y0 ...
    Speccy_James Speccy_James February 2014 Development
  • Idea: New interface 1There are a lot of great new interfaces to plug into the back of the spectrum, but things quickly get rather messy! The interface 1 is a very tidy s…

    ... can remember the ZX81 and RAM pack wobble you will appreciate ... documented why it was so unstable and what the solutions are ...
    rune rune February 2014 Hardware
  • Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…

    ... to go calculate that same value over and over :(" :)

    ram that is going to mean ...
    guesser guesser February 2014 Hardware
  • Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…

    ... are made by changing the value of HL'. This state machine ... are empty etc) to speccy ram that is going to mean ...
    Alcoholics Anonymous Alcoholics Anonymous February 2014 Hardware
  • From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…

    ... this code with "turbo copy ram"... I hate to pause screen ... for [B]change video screen value[/B] or LET v$(pos ...
    Hark0 Hark0 March 2014 Sinclair Basic
  • ZX Alien BreedNot sure if this has been mentioned already (I did trawl the threads but couldn't see anything :smile: ), but I've always hankered after a Speccy Ali…

    ... solid data for Map1 in RAM by the weekend.

    value and then establishing where it ...
    LuMan LuMan March 2014 New game ideas
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... that their machines were simply unstable regarding when the INT starts ... , making both the value for the CPU and value for the display ... always the last value read returned? Does the value become 0xFF at ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... if the frame duration was unstable, 50% of the tests would ... cancel out and the same value is reported every time. And ... because this is the value all other tests are based ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... that their machines were simply unstable regarding when the INT starts ... , making both the value for the CPU and value for the display ... always the last value read returned? Does the value become 0xFF at ...
    introspec introspec March 2014 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... measures in case of such unstable environment.[/QUOTE]
    How do ... is your explanation of the unstable INT duration then? If I ... more subtle issue: when the value to be shown is snatched ...
    introspec introspec March 2014 Emulators
  • Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…

    ... 't take up too much RAM?
    [/quote]

    Not ... , it can represent any real value air pressure. (Most!) Computers don ... selected when a new sample value needs to be output.
    ram available. But sampled instruments are ...
    Alcoholics Anonymous Alcoholics Anonymous March 2014 Development
  • How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…

    ... from registers in locations in RAM, it adds numbers in registers ... 're doing is moving a value (255) into a register (the ...
    LuMan LuMan March 2014 Development
  • JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…

    ... data containing the low-byte value of the start byte for ... de = address of byte in RAM

    lookup:
    .dw ...
    LuMan LuMan March 2014 Development
<1…20212223242526…34>

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