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Search Again :: Adv Search 1000 results in 0.032s
<1234567…34>
  • The I register and IM 1Hi al! I've been doing some coding, replacing the BASIC ROM with my own code and upon examination of a few 16Kb cartridges, all the ones I've look…

    ... />
    ld i,a
    im 1

    ei
    [/code ... , apart from its use in IM 2. Indeed, commenting this line ...
    Mysterion Mysterion November 2015 Development
  • IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…

    ... been fiddling around with IM 2 and have actually mastered ... think) how to use IM 2! Now I run ... in a,(07Eh)
    and 1
    jr nz mainloop ; ... off interrups
    im 1 ;switch to IM 1 and enable
    ... /> ld i,a
    im 2
    ei
    ...
    ekoman ekoman July 2004 Development
  • Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…

    ... something to do with IM 2 addressing, but I ... nz,l88eb ; (-13)
    im 1
    ld hl,#2758
    im 2
    call l8c5c< ... rrca
    and #3f
    ld (l89e7+1),a
    xor ... inc hl
    ld (l8c7d+1),a
    jr l8a81 ; ...
    robpearmain robpearmain November 2006 Development
  • joining lines of BASICDue to overwhelming demand - well, one demand - well, more of a suggestion, really - here's a routine to join together lines of BASIC. The vertical c…

    ... ,(VECTOR+1) ;65136
    SUB 1
    LD I,A
    IM 2 ...
    RET

    DISABLE:LD A,$3F ;65146 ...
    LD I,A
    IM 1
    RET ...
    Battle Bunny Battle Bunny February 2012 Sinclair Basic
  • Jelly-Vision!As threatened in the "'Spectrum Play' Error" thread, here's a ruff'n'reddy interrupt driven full screen wobbling routine which has no practical use w…

    ... /> DEACTIVATE: LD A,$3F
    LD I,A
    IM 1
    RET ... br /> LD I,A
    IM 2
    RET
    < ... nz,TESTSCROLL
    bit 1,(iy+1) ;FLAGS printer in use ...
    Battle Bunny Battle Bunny June 2012 Sinclair Basic
  • The history of ESXDOS, the DivMMC and the DivMMC EnJOY![img]http://benophetinternet.nl/hobby/divmmc_history/1%20esxdos.jpg[/img] These are the stories behind esxDOS, the most popular operating system e…

    ... supported by old FDC765) (1 Internal, 1 External)
    General use ...

    - Resident? Possible IM 1 trapping so we can have ... basic
    and system progs/im 1 soft (ex: key shortcut ... E7 for writing
    - port #3F replace with new port adress ...
    bverstee bverstee October 2015 Hardware
  • type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…

    ... /> ld A, $3f
    ld I, A
    im 1
    ei
    ld I, A
    im 2
    ;
    ld HL ...
    andydansby andydansby July 2020 Development
  • 'Spectrum Play' ErrorI always wondered why the screen sometimes filled with 'SPECTRUM PLAY' if I loaded a 48k game in 128k mode (using my 128k+2B). Colditz Story in parti…

    ... DEACTIVATE: LD A,$3F
    LD I,A
    IM 1
    RET ... br /> LD I,A
    IM 2
    RET
    < ... ld a,(23606)
    xor 1
    ld (23606),a
    Battle Bunny Battle Bunny June 2012 Games
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ...
    D 02F6 LD A,#3F
    D 02F8 LD I ... SP,HL
    D 0309 IM 1
    D 030B XOR A ... it might have a drive 1 / drive 2 jumper to select ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ...
    D 02F6 LD A,#3F
    D 02F8 LD I ... SP,HL
    D 0309 IM 1
    D 030B XOR A ...
    zub zub February 2013 Hardware
  • Questions about Vortex Tracker II exported songsHi, I have been experimenting with Vortex Tracker II lately and have a couple of questions. By exporting the song to TAP format, a file is generated…

    ...
    ld i,a
    im 2
    dec a
    ld a,#3f
    ld i,a
    im 1
    ei ...
    Jerri Jerri March 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ...
    ; on exit
    ;a=1 = 48k mashine
    ;a=#11 ... (c),a
    ret
    ; 1 =48
    ;#11+=128
    ld i,a
    im 2
    inc a

    di
    im 1
    ld a,#3f
    ld i,a ...
    Jerri Jerri November 2014 Development
  • Problems with AY sound. Experts needed. :-)<div><span style="font-family: Arial, Verdana; font-size: 13.3333330154419px; line-height: normal;">I need to play some AY sound effects, so I've bee…

    ... Effect number in .afx file -1 CALL AFXPLAY
    JR $
    IM 2 EI RET
    Then ... /> KILLISR DI LD A,$3F LD I,A IM 1 EI RET
    dbolli dbolli June 2015 Development
  • 128k toast rack diagnosisHi - I recently won a 128K toast rack, and have got a Retroleum smart card. I've tried a couple of games and all seems fine...-ish.<div><br></div><di…

    ... /> ;         Disable interrupts, set Interrupt Mode 1, place the stack in upper ... />             015A  ED56        IM 1
                015C  3E3F        LD A, 3F
                015E  ED47 ... RAM page 0 and ROM 1 (128/+2) or ROM 3 ...
    balford balford June 2015 Hardware
<1234567…34>

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