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<1…18192021222324…34>
  • quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…

    ... the attributes to high memory, then copies the segments ... copies the attributes to high memory.
    [*]Lines 15 & ... select random segments in high memory and the attributes.
    ... FN p(a)=PEEK a+256*PEEK (a+1)[/b ... pv/256): POKE pa,pv-PEEK (pa+1)*256: RETURN ...
    Battle Bunny Battle Bunny February 2014 Sinclair Basic
  • 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…

    ... my paragraph below regarding the memory access. The fact that goodboy ... way in which processor reads memory without generating a delay is ... meantime we have discussed the memory access of Pentagon in ... exactly. So the only thing remaining is to get the results ...
    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…

    ... attributes being pushed to the memory happen on only some cycles ... post on WoS on few remaining inaccuracies in the Pentagon emulation ... shown is snatched from the memory. The thing is, at ... clones are reading the screen memory earlier (essentially, due to ...
    introspec introspec March 2014 Emulators
  • New Game: YAHTZXHi all, Well, it?s taken me more than 3 years, but I think I?ve finally got there. Here is YAHTZX, a 100% assembler version of Yahtzee (? Milton Bra…

    ... score it can with the remaining scoring options.

    Sometimes ... /> If the Speccy had more memory, I would have tried to ...
    Shando Shando March 2014 Brand new software
  • OPUS Discocery DriveHi, since I am new here pls. excuse my bad English. I have a problem with 2 OPUS DISK Drive. One of them is working fine the other not. So I decided…

    ... like this:
    PRINT PEEK 30000+ 256* PEEK 30001
    Your number ... < 8192. Use the 'double' PEEK.

    The keyword/token ... 'Channel' that is connected to memory. You will love it when ...
    roko roko March 2014 Hardware
  • dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…

    ... want to take a quick peek, but 25 years ago I ... load a BASIC loader into memory, "clean" it and then re ... line 0, no Out of Memory messages, etc.
    zxbruno zxbruno March 2014 Sinclair Basic
  • dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…

    ... want to take a quick peek, but 25 years ago I ... load a BASIC loader into memory, "clean" it and then re ... line 0, no Out of Memory messages, etc.[/QUOTE]

    PEEK A: NEXT A

    Timmy Timmy March 2014 Sinclair Basic
  • 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…

    ... .... JP nn will jump to memory address nn.
    JP (HL ... would read the contents of memory address HL and jump to ... ,jumptable
    JP (HL) ; read/peek the contents of HL and ... 't, it jumps to the memory location HL


    rich_chandler rich_chandler March 2014 Development
  • Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…

    ... amongst other things) reads from memory whilst minimising contention (i.e ... address, and only the remaining seven bits are allowed to ... display generation to the refresh memory. Since the display is ... are plenty of other memory arrangements that would work ...
    zub zub May 2014 Sinclair Miscellaneous
  • Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…

    ... =0 to 4
    print peek(@datalabel+a)
    next a ...
    30 let a(f)=peek (54999+f)
    40 next ... ,9,10 is stored in memory from address 55000 to 55010 ...
    LCD LCD May 2014 Sinclair Basic
  • Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…

    ... =0 to 4
    print peek(@datalabel+a)
    next a ...
    30 let a(f)=peek (54999+f)
    40 next ... ,9,10 is stored in memory from address 55000 to 55010 ...
    davepierce07 davepierce07 May 2014 Sinclair Basic
  • DIM and FOR, NEXT loopHi there. I'm making a program with 100 items on screen using dim and a for next loop. The thing is, each time I want to manipulate the items I do an…

    ... /> [/CODE]Also better use memory access with peek and poke because they ...
    LCD LCD May 2014 Sinclair Basic
  • DIM and FOR, NEXT loopHi there. I'm making a program with 100 items on screen using dim and a for next loop. The thing is, each time I want to manipulate the items I do an…

    ... 't it be quicker to peek a single attribute instead of ... the end of the screen memory to check where something is ...
    ASH-II ASH-II May 2014 Sinclair Basic
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... 32768,0
    PRINT PEEK 32768
    This should ... POKE 32768,255
    PRINT PEEK 32768
    This should ... POKE 32768,170
    PRINT PEEK 32768
    This should ... 32768,85
    PRINT PEEK 32768
    This should ... can not do the memory tests but could it ...
    Brian Brian May 2014 Hardware
  • Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…

    ... a fastcalled instruction to copy memory.
    if you want to ... can try this to copy memory:
    [CODE]
    DI
    Poke 56000+a,peek (55000+a)
    Next a ...
    LCD LCD May 2014 Sinclair Basic
  • Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…

    ... a fastcalled instruction to copy memory.
    if you want to ... can try this to copy memory:
    [CODE]
    DI
    Poke 56000+a,peek (55000+a)
    Next a ...
    davepierce07 davepierce07 May 2014 Sinclair Basic
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... to proceed? As the upper memory (or the logic IC's ... 't do the [CODE]print peek 23732 + peek 23733 * 256[/CODE] trick ... [/I] or [I]which upper memory chip is gone[/I]? I ...
    georgedb georgedb June 2014 Hardware
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... is preventing the upper memory being seen at all ... during the memory check, so the Speccy ... the wire and POKE/PEEK from the upper 32K ...
    POKE 32768, 85: PRINT PEEK 32768
    POKE 32768, 170 ... : PRINT PEEK 32768

    What ...
    balford balford June 2014 Hardware
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... ;771804]POKE 32768, 85: PRINT PEEK 32768
    POKE 32768, 170 ... : PRINT PEEK 32768

    What this ... something about the whole upper memory and even more specific a ... potential broken upper memory chip, by just checking one ...
    georgedb georgedb June 2014 Hardware
  • UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…

    ... emphasis of addressing the memory directly with Peek and Poke. Pretty tricky ...
    Dock Dock June 2014 Sinclair Basic
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... so I can put the remaining IC's on them.
    memory.
    Have removed a leg ...
    Brian Brian June 2014 Hardware
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... />
    POKE 32768, 85: PRINT PEEK 32768
    POKE 32768, 170 ... : PRINT PEEK 32768

    B[/QUOTE ... /> Something that controls the upper memory initially, maybe I need to ... also tried further up in memory at address 35000 and 60000 ...
    georgedb georgedb June 2014 Hardware
  • UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…

    ... with:
    [CODE]PRINT PEEK 23606 + 256 * PEEK 23607[/CODE]
    You ... TO 895: POKE (64472+n),PEEK (15616+n): NEXT n[/CODE ... 've laid this out in memory, the character set ends at ... they're now contiguous in memory.
    joefish joefish June 2014 Sinclair Basic
  • Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…

    ... ]Compile each block to different memory area. Call other blocks with ... , pass variables/info by POKE/PEEK, return from called program by ... loading that in low in memory after compiling and NEWing the ...
    Pobbit Pobbit June 2014 Sinclair Basic
  • Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…

    ... could POKE it as a memory block then delete those statements ... rewrite the loops to use PEEK instead.

    Mcoder III ...
    joefish joefish June 2014 Sinclair Basic
  • Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.

    ... 32 for each of the remaining seven rows.

    So ... stored in sequence, anywhere in memory will do. You just need ... . This is because in screen memory, within a character space, each ... addressed 256 bytes higher in memory.

    Using LDI like ...
    joefish joefish July 2014 Development
  • Tipshop materialHello, all.. I'm kind of repeating myself from a reply on another section of the forum, but I'm covering myself here. If anyone is sending me POK…

    ... made up of memory addresses where you could peek another address to ...
    cole cole August 2014 Sinclair Miscellaneous
  • Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …

    ... , then try testing every memory location using something like the ... 20 POKE n, 85: IF PEEK n 85 THEN PRINT "Error ... at ";n;", 85 "; PEEK n
    30 POKE n ... , 170: IF PEEK n 170 THEN PRINT "Error ... at ";n;", 170 "; PEEK n
    40 NEXT n ...
    balford balford August 2014 Hardware
  • Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …

    ... /> It may be that the memory check routine in the ROM ... off position). Then you can PEEK and POKE to find out ...
    1024MAK 1024MAK August 2014 Hardware
  • Machine Code in 30 minutes - car gameWotcha folks, 30 years on and I'm still struggling with Machine Code. I'm going through the 30-minute tutorial on the Chuntey blog and it's all made…

    ... Manual is that we're 'peek'(ing) the Accumulator with the ... processor can read and write memory but can also communicate with ... different thing than reading from memory cell 65278 and 32766.
    Ralf Ralf August 2014 Development
<1…18192021222324…34>

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