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Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…
... 65024
; pointers To interrupt routine.
defb 200
defb ... -
im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…
... looking for a horizontal scroll routine. i read somewhere that you ... ' statement, somewhere in a print routine. although i am open to ... -
Key repeat weirdness with EI & IYI finally (after 35 years!) decided to write something a) for 48k speccy b) in z80 assembler. It's been over 20 years since I've written anything in …
... I created was a routine that draws 16x16 sprites ... be the slowest sprite routine ever but it works ... of that I use HALT instruction to wait for ... vertical retrace. And HALT does not seem to ... wait for vertical retrace without HALT & EI?
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High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... general purpose high score table routine. It stores 5 scores and ... /> RET ; exits the routine
PRINTNUM: ; routine by J. Cauldwell
A SAVE routine to reduce Microdrive loading timesHello! Please i'd like to know if there is a SAVE routine written to reduce the zx microdrives loading times.
Hello!
Please i'd like to know if there is a SAVE routine written to reduce the zx microdrives loading times.No-tearing (“vsync”) Full Screen FadeSeeing as most screen fades exhibit visible tearing, I wrote my own routine which does away with that problem. Simple, effective, short, and fully re…
... tearing, I wrote my own routine which does away with that ... of attr area
halt ;wait for beginning of frame ... minimum for a custom IM2 routine
1$ dec de ;until ...Machine code routine neededHello! Please i'm looking for a short routine that can write the same value in a range of continous memory locations. For example, to write 255 val…
Hello!
Please i'm looking for a short routine that can write the same value in a range of continous memory locations.
For example, to write 255 value from location 40000 to 41000.
Many thanks in advance.looking for a vertical scrolling routinein basic or like the standard scroll? routine but the other way round with the scroll? removed (this would have to be in code). ive tried a couple of…
... or like the standard scroll? routine but the other way round ...Restoring AY registersAfter doing (not still finished) the sna to tap converter, I'm going to try to do the same for 128k snapshots. I've got threee ideas about what to do…
... embedded) a machine code routine that does the following ... the screen with the routine that restores them. ... can be simultaneous. The routine placed at 16384 loads ... need to put a delay between selecting an AY ... there are an interesting routine at address 7805: an ...im looking for a machine code star-field routineim looking for a machine code star-field routine. preferably with mnemonics.
im looking for a machine code star-field routine. preferably with mnemonics.Passing parameter from BASIC to assembler routineWas there a "clean" way of passing parameter(s) from a BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR call? I fac…
... BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
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-added copper opcodes NOOP, HALT
-increased tbblue.mmc MMC ... /> -debug CPU window: show interrupt routine pointer on im2 mode
Which Emulator has a menu option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT? I tried SpecEmu and Fuse, b…
Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?
I tried SpecEmu and Fuse, but I can not find a option for doing this in their debugger.Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... not even have an AYplayer routine with compatible aymusic. and, I ... play command that it wont halt basic program while playing, it ...TimingHey All, Is their away of obtaining timing information on ZX128k other than addresses 23672->23674. Basically I would like to identify every 100th …
... interupts, but your own timing routine (CPU clock tact).
Vertical ... detect it, but you can HALT to wait until VBL occurs.VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... fool, all I needed was HALT, Aghhhhhhhhhhh
So many ... />
Basic's interrupt service routine takes more than a thousand ... halt. You'd save time if you wrote your own interrupt routine ...VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... program was in assembly? Would HALT serve the purpose then?
routine that simply does an "ei ... way the instruction following a halt will be executed around 19 ... this thread (prior to the halt) was reading the frames system ...VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... program was in assembly? Would HALT serve the purpose then?
[/quote]
DI
HALT
Is a sure way ... recommend to write own interupt routine too.Game loop design?Having some thoughts on how to design the game loop and could do with some hints and tips from folks who have done it before! It's all about how to …
... should be prepared then that routine should be called (after ... 'proper' code as CALL draw_screen \ HALT \ JR halt_inst \.
... first screen
enter IM2 routine
new screen to ... proper program
jump to HALT instruction
reenter IM2 ...need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... POP BC ;At present routine is written to handle< ...
HALT
CALL DRAWSPR ;Call sprite drawing routine
< ... />
* Routine to Generate a screen address ... />
* Routine to generate a table of ...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... /> LD (OKTOFLIP),A
HALT
JP MAIN ... /> RETI
; **** END INTERRUPT ROUTINE ***
WRITECHAR:
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... /> LD (OKTOFLIP),A
HALT
JP ... /> RETI
; **** END INTERRUPT ROUTINE ***
WRITECHAR:
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... lp1
halt
LD A,1 ... /> RETI
; **** END INTERRUPT ROUTINE ***
WRITECHAR:
