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Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
... textured/hatched fill M/C routine for the ZX Spectrum 48K ... -
Fighting Warrior's protection systemThis is one of those bizarre cases where cracking the loading system is orders of magnitude more fun than playing the game. (Indeed, discovering I wa…
... bunch of Raspberry Pis for test machines ... anyway, I digress).
CALL 0556 headerless loader, then executes ... error) which calls the ERR_SP routine and hence the code to ... jump to it. The copying routine takes the code hidden on ... -
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... used IntelObject2tap and R80 to test. I had Out Of memory ... .
RET Z ; Return from routine if B=0.
RET PO ; Return from routine if no reset bits.
Next_byte
CALL Process_byte
DEC B ; Decrement ... -
Finding the length of loaded Bytes:Is there a way from BASIC of finding out how big a block of bytes loaded from tape was? i.e. - if you do LOAD""CODE and load in a lump of bytes, ca…
... with one loader and later test whether
it's a ... DE, 65535
SCF
CALL #556
LD HL,65535 ... with 65535 prevents initial byte test. Further the loader will also ... the checksum. I use this routine in my copy-program. -
Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
...
iv) You can now test to see if everything has ... now we need a routine to decrease the number ... then jump to game over routine
LD (40000),A ... of writing this similar routine but this should give ... had found the lives routine whilst hacking as follows ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... to your 'real' interrupt routine. However, this doesn' ... tstates to reach the interrupt routine:
* M1 ... [quote]
With a CALL nnnn on the data bus ... have a short interrupt routine, it is possible ... -zero. Unfortunately, the test was reversed in the ... -
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... />
* Collision Detection Routine: Returns with A holding the ... X coord of sprite to test for
LD ... Y coord of sprite to test for
LD ... X coord (player)
CALL TESTX
... Y coord (player)
CALL TESTY
... -
Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …
... of the third
call label2addr(unscrambleHL) ; linearize it ... br />
; interrupt routine
; it does the same ... h
and 8 ; test if we're finished
donotStartOver:
call label2addr(unscrambleHL)
; put it ... -
Zecut0r and ZAFA while ago (about 2 yrs)i took VbSpec and tried to port it to Delphi 6. Althought it was pretty weak, it. Meanwhile DelphiSpec 0.1 appeared and i wa…
... />
procedure zxcls ;"call zx cls"
0 ink ... 2
call 5633
call 3435 ;"call ZX ROM ROUTINE"
asmend ... />
procedure zxbeeper ;"beeper test"
asm ;"asm code"
call 949 ;"call ZX Beeper ROM ROUTINE"
asmend ... -
Reading the keyboardDoes anyone have a code sample to read the keyboard in machine code ?
... />
[code]
*-------------------------------------------
* Routine to Scan the Keyboard
PUSH BC
CALLADDR CALL 0
POP BC ... addresses and the bits to test for the particular keys being ... -
The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... In the old screendump the test for return is done ... /> jr nc,nline
call #22b0
jr nbyte< ... opportunities for the 33 bytes routine, which would look like ... can alter the last test I can skip a ... /> add a,b
call #22b0 ; always calculate screen ... -
The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... /> jr nz,print
call nc,#22b0
jr nc ... br /> call nc,#22b0
jr nc,nbyte
{exit routine}
test on return. Only the ... The routine is now 33 Bytes, but the BASIC-call uses 1 ... -
Timex 80 column display driverI subsequently wrote an 80 column font driver for 512x192 mode.
... ) ; ix = address of char print routine
ld hl,(nextdfile) ; hl ... = dfile address left side
call calcnextdfile ; hl = dfile address right ... />
inc l ; do not test for line wrapping here as ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... ]
This is the test program's implicit memory allocation ... u_malloc and u_free. SP1 will call these functions to request and ... set up our own interrupt routine and another way is to ... queues.
The first call to "ba_AddMem()" adds 10 blocks ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
The next test program is going to ... that effectively causes a subroutine call to a location in ... [*] The Basic system's interrupt routine at 0x38 takes at least ... of the interrupt subroutine to call. Another look at the ... and makes the first call into IM2.LIB's ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... This generic interrupt service routine takes care of details ... the interrupt service routine address and will call 0xd4d4. 0xd4d4 is ... will install an interrupt service routine on any vector (peripheral ... br />
The next test program will show these ideas ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... your own IM2 interrupt service routine.
The pacman ... the left.
The call to sp1_IterateSprChar() colours the pacman ... the in_KeyPressed() function to test the state of a single ... one block. If this test program hadn't been sitting ... -
Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …
... as a "virtual" screen to test my sprite/tile clipping and ... do through calling a ROM routine. That is fine and would ... page. (see:*)
3. Call the rom to page (1 ... -
PAW tests - help and discussion :)Hello my friends :) I have started to make some tests with PAW and I must say I'm very pleased and surprised at the great program. I will be posting…
... Colin :) I keep getting questions, call it Newbs syndrome ;-)
routine?
Furthermore, are doors ... not, make your location 2 (test your adventure with diagnostics on ... -
It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …
... and finally run a test to demonstrate that the ... basically, do a functional test in a sequence once the ... memory test has passed, and indicate ... LEDs when the ULA test is done. If everything ... call it and page the Spectrum ROM back in so the routine ... -
My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... copied the screen rendering routine from the one ...
Fair 'nuff. Your routine is slower though :-) Jumps, relative ... start
call IncY ;get next line draw ... so no need to test the value of d ... -
New Game - JustinA new isometric 3D Game for ZX Spectrum, Justin: [url]http://cpce.emuunlim.com/justin.tap.zip[/url] It can be played in spanish and english languaj…
... Okay, I've got a routine to activate/deactivate invincibility (press ... meantime, if anyone wants to test it out then here it ... RET into B
CALL keypress ;run keypress routine
LD A ... NC into B
CALL keypress ;run keypress routine
JP $E4E9 ... -
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... to test his code?
62 bytes in size, CALL the ... down to below 100t (the call alone takes 17), but that ... our code
; including the CALL: 17+10+11+7+11 ... /> ; and jump to the correct routine from the table.
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... of 54 T-states, with CALL, RET and NOP added it ...
jr nz,no-exit ; test on H > 0
routine
ld l,(hl) ; fetch ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... the memory buffer by this routine and the scroller will just ... next line). 2- the scroll routine will be dealing with messages ... "()" becomes false. While loops always test the true/falseness of the ... we apply the magic. We call the function we passed as ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... one delimeter character). The initialization call returns a pointer to the ... will be executed while the test condition is true. In this ... code byte by the while test. A specific case of switch ... use of a display address routine in the spectrum library called ...
