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<1234567…34>
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... left verge on next line'
    Insert line 16, 'add hl ... is 'ei' = 'enable interrupts'
    Replace line 3 with 'di'. Insert ... line 29, ei. Insert line 31, di. Insert line ... paper colour.
    Delete line 53. Delete line 53 again!
    ...
    bigjon bigjon November 2009 Development
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... left verge on next line'
    Insert line 16, 'add hl ... is 'ei' = 'enable interrupts'
    Replace line 3 with 'di'. Insert ... line 29, ei. Insert line 31, di. Insert line ... paper colour.
    Delete line 53. Delete line 53 again!
    ...
    buzzy buzzy September 2012 Development
  • about Dan DareHi all, I not think this is for MIA forum but want to ask and I will be grateful if anyone help me with answer. I get from ebay dandare tape, origi…

    ... , top to bottom - so line 1, line 192, line 3, line 190 etc. This was ...
    leespoons leespoons February 2013 MIA/STP/SDP
  • What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…

    ... that Table (384 bytes, ie. 192 line addresses) is stored (its relocatable ...
    dmsmith dmsmith March 2020 Development
  • New game coming soon: PhaetonI have thought that I'll announce it now to build some anticipation ;) I'm almost ready with my new Spectrum game called [B]Phaeton[/B]. It is a g…

    ... is completely desynchronised with interrupts on Pentagon model. Going too fast ... .[/QUOTE]

    Pentagon is russian ZX clone. Run ... Pentagon generate interrupt at end of screen area = end of line 192 ... in fixed version for Pentagon machines and this game ...
    velesoft velesoft December 2010 Games
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... . The time the /INT line is held low can be ... interrupt routines; see the retriggered interrupts section below.

    ... flag is reset, even if interrupts were enabled beforehand.
    ... 'nnnn'.

    Retriggered interrupts

    If you have ...
    Philip Kendall Philip Kendall July 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... and move to next char line
    CALL AChar
    ... ,0
    DEFB 0,128,192, 96, 32, 32, 16, ... 168, 64,160, 64,160,192,112, 15
    DEFB ... /> ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH
    robpearmain robpearmain August 2004 Development
  • Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …

    ... H ; *256 TO GET NEXT LINE
    INC B
    ... 16
    DEFB 192, 32
    DEFB 192, 32
    DEFB ... 64
    DEFB 192, 32
    DEFB 192, 32
    DEFB ... ; 0FD00 - 0FDFCH RESERVERD FOR IM2 INTERRUPTS

    ORG 0FDFDH
    robpearmain robpearmain September 2004 Development
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... the SAM Coup? and the Pentagon "the ultimate Spectrum" or "the ... ? Where would you put the line between what you consider a ...
    mcleod_ideafix mcleod_ideafix August 2009 Development
  • "Attribute embosing" on Pentagon 128I'm still in the progress of build my 2 Pentagon 128 machines and everything seems to be sorted out by now :) Except for 1 more or less minor issue. …

    ... progress of build my 2 Pentagon 128 machines and everything seems ... (like the very first vertical line being darker) ... this seems to ...
    Shockwav3 Shockwav3 March 2013 Hardware
  • ZEsarUX-7.0Hi! I have uploaded a new ZEsarUX stable version :) This is ZEsarUX 7.0 There are a lot of new features added, more than ever! You can downl…

    ... emulation:
    * added TSConf DMA, line interrupt, sprites layers
    * TSConf ... 0000-3FFFH
    Fixed Raster interrupts on ZX-Uno and TBBlue ... /> Fixed window footer when running Pentagon
    Fixed panic screen: now ...
    chernandezba chernandezba May 2018 Updates
  • New discovery on Z80 interrupts.This is to announce the discovery of a new, hitherto unknown, behavior of the RETI and RETN instructions. As everyone knows, the maskable interrup…

    ... immediately after re-enabling interrupts if the /INT line is still active ...
    rich_chandler rich_chandler April 2022 Emulators
  • Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…

    ... did that again with the Pentagon and the page changed OK ... line 1. It does not access any BASIC feature, it disables interrupts ...
    GOC GOC November 2003 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... and move to next char line
    CALL AChar
    ... ,0
    DEFB 0,128,192, 96, 32, 32, 16, ... 168, 64,160, 64,160,192,112, 15
    DEFB ... /> ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH
    robpearmain robpearmain August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... and move to next char line
    CALL WriteBlankSpriteChar
    ... 0
    DEFB 0,128,192, 96, 32, 32, 16, ... 168, 64,160, 64,160,192,112, 15
    DEFB ... ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH
    robpearmain robpearmain August 2004 Development
  • Mayhem Accelerator - Prototype Complete [Sam CoupI am now pleased to announce that on the 8th June the prototype of the Mayhem Accelerator was finally completed. With work on the accelerator start…

    ... line interrupts, which you can set to trigger at any of the 192 ... such instead of using the line interrupts and timing in the border ...
    Quazar Quazar December 2006 Announcements
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... 192.

    In fact, handing you back to the command line ... type, because the ROM disables interrupts whilst it makes the keyclick ...
    joefish joefish May 2009 Development
  • DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…

    ... 7MHz on russian ZX clone Pentagon

    Next info about ... :
    - length of each TV line is 224 tacts in 3 ... of last ZX screen line (end of line 192)
    - adressation of port ... OUT #EFF7,#04 can switch Pentagon 1024 to original 128kB mode ...
    velesoft velesoft May 2010 Announcements
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...
    SCRHGT equ 192 ; Screen height in ... /> xor_sprite di ; Must disable interrupts for SP change
    ld ... />
    ; --------------------------------------------------------------------------


    ; Line Position Table (defined as data ...
    ASM ASM October 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...
    SCRHGT equ 192 ; Screen height in ... /> xor_sprite di ; Must disable interrupts for SP change
    ld ... />
    ; --------------------------------------------------------------------------


    ; Line Position Table (defined as data ...
    sekrets sekrets November 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...
    SCRHGT equ 192 ; Screen height in ... /> xor_sprite di ; Must disable interrupts for SP change
    ld ... />
    ; --------------------------------------------------------------------------


    ; Line Position Table (defined as data ...
    ASM ASM November 2010 Development
  • New game coming soon: PhaetonI have thought that I'll announce it now to build some anticipation ;) I'm almost ready with my new Spectrum game called [B]Phaeton[/B]. It is a g…

    ... didn't know that Pentagon generates interrupt at line 192.

    ... what a waste :) ) until roughly line 192 is reached and begins clearing ... the moment how to detect Pentagon.

    But ... version with intro, cheats and Pentagon fix... You have my ...
    Ralf Ralf December 2010 Games
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... 3. How do I handle interrupts? I mean, is increasing ... more to know about interrupts-there are 3 interrupt ... I got around to implementing interrupts.)

    [quote]< ... )*4, height = (48+192+48 )*4
    where ... till last speccy display line is done
    6 ...
    Arjun Arjun June 2011 Emulators
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... it is still 50 Interrupts per second as standard ... line number to generate a line interrupt before, with >=192 ... of interrupt that occurred (frame, line, ...).

    As ... really belong. If antoniovillena wants line interrupts, more colours, etc. then ...
    obo obo October 2011 Development
  • Precisely timed loops in assemblyI'm looking for a way to make my code stop until the raster has reached the lower screen border (right after having drawn the last pixel line). I und…

    ... do 7 loops for each line of the screen (assuming it ... between 48K, 128K, +2A (and Pentagon) machines, but you can determine ... between two interrupts, to see if I'm on a Pentagon (which ...
    joefish joefish February 2012 Development
<1234567…34>

Latest Posts

  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade 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

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pentagon 1.6K 2.3K
interrupts 1.5K 2.2K
192 941 1.9K
line 19.4K 33.7K

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