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<1…18192021222324…34>
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    PRINT PEEK 23732 + PEEK 23733 * 256 = **** to get my ... value
    POKE ****,85 : PRINT PEEK ****
    Ive been swapping chips ... 170. Tried Paul Farrows 128k RAM tester ROM, keeps throwing up ...
    Macc Macc August 2012 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    ... RAM.

    Note that the command:

    PRINT PEEK 23732 + PEEK ... working address found by the RAM test routine. So, for what ... try to identify the faulty RAM IC.
    Zorn Zorn August 2012 Hardware
  • Successfully updated Issue 2 48k to 128k?Thanks to the donation by PMSR and through the very patient teachings of Velesoft, I have updated the Issue 2 to work with 128k. However. I have yet …

    ... detail of the modified memory map of this arrangement, I am ... for the 16k to 32k RAM segment / bank (which contains the ...
    1024MAK 1024MAK August 2012 Hardware
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... all snapshots
    ;Z80 snapshot - ram pages is loaded to correspond ... all snapshots
    ;Z80 snapshot - ram pages is loaded to correspond ... br /> ;fixed bad length of ram pages (in routine for loading ... = 512 bytes before TR-DOS map area.[/B]

    For ...
    velesoft velesoft August 2012 Announcements
  • How much memory on sprites, maps etc.I've been tinkering with shifting & pre-shifting sprites recently, but as I haven't had that much experience with Z80 assembly I sometimes find it ha…

    ... System is to have the map made up of composite tiles ... fairly large map in a relatively small amount of RAM. The trade ... of complexity in getting the map data onto the screen which ...
    chev chev September 2012 Development
  • [MOD] R-Type IIII suppose it makes sense now to register [URL="http://www.worldofspectrum.org/forums/showpost.php?p=401659&postcount=15"]R-Type III[/URL] back in the…

    ... to play. There is no map, just endless random alien ships ... /> Someone other than me must peek the code and confirm mheide ...
    LCD LCD September 2012 Infoseek database
  • Tape problemsI have finally got round to resurrecting my 16K Spectrum, but cannot get any success in loading software. I am plugging it into the headphone port o…

    One other possibility is a memory fault, so that the available RAM is less than 16k. The ROM startup routine sets P_RAMT to the address of the last good byte, so on a 16k Spectrum PEEK 23732 + 256*PEEK 23733 should give 32767.
    Battle Bunny Battle Bunny September 2012 Sinclair Miscellaneous
  • Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…

    ... you want all 64k as RAM, your program will only run ... to have a completely unravelled map with 1 byte per block ...
    R-Tape R-Tape October 2012 Development
  • Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…

    ... and graphics in extra RAM pages in compressed form, ... current level data (map+gfx) to main RAM, then it ... whole 48K RAM, but we have our gfx/map buffers ... and the code to copy them from other RAM ... extra levels on extra RAM pages which are uncompressed ...
    na_th_an na_th_an October 2012 Development
  • Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…

    ... of the upper 32K of RAM and so the Spectrum initialises ... or more of the upper RAM ICs, IC15 - IC22. These can ... possible to use POKE and PEEK to identify which are faulty ... thorough (but far from perfect) RAM test program you could try ...
    Zorn Zorn October 2012 Hardware
  • Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…

    ... /> POKE 50000,85
    PRINT PEEK 50000
    POKE 50000,170 ...
    PRINT PEEK 50000

    You should ... it's more complicated - your RAM chip has an addressing error ...
    Spirantho Spirantho October 2012 Hardware
  • Query about memorySo I know this has been asked a lot and I beg your brief indulgence. I have scanned through a lot of old threads already but I'm trying to improve m…

    ... test to determine how much RAM is in the Spectrum. ... of RAM found. To view this value, enter:

    PRINT PEEK ... 23732 + 256 * PEEK 23733

    This ... are also possible when faulty RAM is encountered.

    ...
    Zorn Zorn October 2012 Hardware
  • Query about memorySo I know this has been asked a lot and I beg your brief indulgence. I have scanned through a lot of old threads already but I'm trying to improve m…

    ... test to determine how much RAM is in the Spectrum. ... of RAM found. To view this value, enter:

    PRINT PEEK ... 23732 + 256 * PEEK 23733

    This ... are also possible when faulty RAM is encountered.

    ...
    EightBitTony EightBitTony October 2012 Hardware
  • Query about memorySo I know this has been asked a lot and I beg your brief indulgence. I have scanned through a lot of old threads already but I'm trying to improve m…

    ... />
    The type of RAM chips used in the ZX ... are eight DRAM (Dynamic RAM) chips each 16k addresses ... (the "bottom" 16k of RAM) plus eight DRAM chips each ... (the "top" 32k of RAM) giving a total of 48k ... manual.

    PRINT PEEK 23733
    To be fair ...
    1024MAK 1024MAK October 2012 Hardware
  • Query about memorySo I know this has been asked a lot and I beg your brief indulgence. I have scanned through a lot of old threads already but I'm trying to improve m…

    ... returns 127
    PRINT PEEK 23732 + 256 * PEEK 23733 returns 32767[/QUOTE ... />
    POKE 32768,85 : PRINT PEEK 32768 returns 87
    POKE ... 32768,170 : PRINT PEEK 32768 returns 175

    ram top no good).
    EightBitTony EightBitTony October 2012 Hardware
  • Query about memorySo I know this has been asked a lot and I beg your brief indulgence. I have scanned through a lot of old threads already but I'm trying to improve m…

    ... /> POKE 32768,85 : PRINT PEEK 32768 returns 87
    POKE ... 32768,170 : PRINT PEEK 32768 returns 175
    ... and CLEAR 32768 gives ram top no good).[/QUOTE]< ... /> POKE 32768,0 : PRINT PEEK 32768
    and
    POKE 50000,0 : PRINT PEEK 50000

    ...
    1024MAK 1024MAK October 2012 Hardware
  • Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…

    ... that we can test higher ram in 16K mode by shorting ... last working RAM location is.

    However, when using PEEK and ... , you can PEEK and POKE to test the higher RAM :)

    1024MAK 1024MAK October 2012 Hardware
  • SAGE gamebook project newsThat's the Spectrum Adventure Gamebook Enhancement, that is (for the time being, anyhow). I've updated the [url=http://www.users.globalnet.co.uk/~jg2…

    ... going to keep the route/map handling and the narrative setup ... too big to hold in RAM), so the new, combined package ...
    Battle Bunny Battle Bunny October 2012 Announcements
  • Yumiko in the haunted MansionSo, here is the promised Halloween preview... Go to the zx section of my homepage to download it. [img]http://members.inode.at/838331/zx/YomikoInTheH…

    ... allows you to peek only few times at the map, but only ...
    LCD LCD November 2012 Brand new software
  • Yumiko in the haunted MansionSo, here is the promised Halloween preview... Go to the zx section of my homepage to download it. [img]http://members.inode.at/838331/zx/YomikoInTheH…

    ... allows you to peek only few times at the map, but only ...
    R-Tape R-Tape November 2012 Brand new software
  • Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…

    ... not lighting candles on the map, to Fastcall function:
    [code ... to 439
    c=c+(peek(@Level+b)=4)
    next ...
    LCD LCD November 2012 Development
  • I want to upgrade 16k to 48k - need help.I recently purchased a lovely little 16k machine (Issue 2) but I'd like to upgrade it to 48k. I'd rather not use a Ram pack as I think they are ugly…

    ... with 48K RAM. To test it, type:
    [code]PRINT PEEK 23733 ...
    mcleod_ideafix mcleod_ideafix November 2012 Hardware
  • Spectrum 16K Issue 3Hi! I just received a Spectrum 16K, which turns out to be an Issue 3. Is it really that rare? If not, I?d like to upgrade it to 48K. There are 12 em…

    ... situation. Swapped over all eight RAM chips from the faulty issue ... , keyboard?s working, entered Print peek 23733 and received 255, as ...
    schombi schombi November 2012 Hardware
  • Spectrum 16K Issue 3Hi! I just received a Spectrum 16K, which turns out to be an Issue 3. Is it really that rare? If not, I?d like to upgrade it to 48K. There are 12 em…

    ... upper 32K (say 60000) and PEEK it back again. Use values ... 0 to 255) to upper RAM in consecutive addresses, then read ... values in upper RAM and see if other RAM addresses change when ...
    Spirantho Spirantho November 2012 Hardware
  • Spectrum 16K Issue 3Hi! I just received a Spectrum 16K, which turns out to be an Issue 3. Is it really that rare? If not, I?d like to upgrade it to 48K. There are 12 em…

    ... upper 32K (say 60000) and PEEK it back again. Use values ... 0 to 255) to upper RAM in consecutive addresses, then read ... values in upper RAM and see if other RAM addresses change when ...
    schombi schombi November 2012 Hardware
  • CAT!RAM and PUTRAMLast year sometime I posted a couple of routines to: * catalogue the 128k RAMdisk in BASIC; * move RAMTOP and the stacks from BASIC. CAT!RAM and PUTR…

    [code]
    REM CAT!RAM print the RAMdisk catalogue & ... DEF FN p(a)=PEEK a+256*PEEK (a+1)
    ... $(n,b-a+1)=CHR$ PEEK b: NEXT b:
    ... 0,1,2,3,4 RAM pages 1,3,4,6 ... )=FN p(b)+VAL p$(PEEK (b+2)+1)/10: ... 10: LET f(n,4)=PEEK h:
    REM 1 type ...
    Battle Bunny Battle Bunny December 2012 Sinclair Basic
  • Project on ZX Spectrum in UniversityHi everyone, I am Max, student of media studies in berlin, and I have to do a little project on the spectrum. I am working on a sinclair zx spectrum…

    ... FN j$(s,l)=CHR$ PEEK (s)+VAL$ (("FN j$("+STR ... (ie. tracing routes on a map). 's' is the node address ...
    Battle Bunny Battle Bunny December 2012 Announcements
  • Some stupid 16K questions...Starting with... 1. Should a 16K Spectrum that's been upgraded to 48K behave [I]exactly[/I] like a 48K Spectrum? i.e. should the machine test/clear…

    Issue 2 and Issue 3 had sockets for RAM upgrade, don't remember now about issue 1.
    ZX ROM tests all 48k memory at start-up, so PRINT PEEK 23733 should give 255
    for 48k.
    kpuchatek kpuchatek December 2012 Hardware
  • Some stupid 16K questions...Starting with... 1. Should a 16K Spectrum that's been upgraded to 48K behave [I]exactly[/I] like a 48K Spectrum? i.e. should the machine test/clear…

    ... an issue 2 motherboard, high RAM permanently soldered in, telling me ... letting me POKE into and PEEK from addresses higher than 32767 ... 48K Spectrum with faulty high RAM?

    Sorry to sound ...
    snigfarp snigfarp December 2012 Hardware
  • 16k --> 48kI bought a zx and found out it was a 16k since when I execute PRINT PEEK 23733 I get 127 Does it mean I get a lesser model? What limitations do I h…

    ... when I execute
    PRINT PEEK 23733
    I get 127 ... few logic chips and some RAM. There are others on here ...
    snigfarp snigfarp December 2012 Hardware
<1…18192021222324…34>

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