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AY Magic version for ZX81 was bornModified Ay magic ,my previous interface for zx48. On board, ay chip based on Zonx interface but with stereo output and rampack 16 or 32 kilo on boa…
... is used by zx81 NMI interrupt routine as a jump vector, hopefully ... but since as only the interrupt routine can stop the player part ... />
and lastly a special interrupt handler is written with minimal ... -
128k RAM paging from BASICI'd always thought that OUT had to be used to page RAM, which from BASIC would be an "OUT 32765,ddd" command, although I don't know if just doing tha…
... ]
I think the interrupt routine resets it, doesn't it? -
Getting the contents of tablesHi All, I'm risking a potentially daft question here as it seems pretty fundamental but here goes: What's the best way of pointing register pairs a…
... the ROM, and in the interrupt routine - so you cannot use it ... the ROM routines (including default interrupt handler).
Disable interrupts ... />
Or provide your own interrupt routine, which you are [i]bound ... -
SP1 library questionsI'm working on my first game. I've not written a game since the late 1980s and that was a text based multiuser dungeon for BBC Micros with econet... …
... interrupts (the normal Spectrum ROM interrupt routine was being run). I'm ... guessing that something the ROM interrupt routine does was affecting SP1.
routine? -
SP1 library questionsI'm working on my first game. I've not written a game since the late 1980s and that was a text based multiuser dungeon for BBC Micros with econet... …
... (the normal Spectrum ROM interrupt routine was being run). I' ... guessing that something the ROM interrupt routine does was affecting SP1.< ... I have my own IM2 routine?[/QUOTE]
Nope ... need to synchronize with the interrupt although doing so *may* ... -
Is it possible to access the +3 disk drive via m/c in USR0 mode?Is it possible to access the disk drive of the +3 via m/c +3DOS calls when running in USR0 mode? I ask because I'm having an awful lot of trouble ge…
the motor off is done in the interrupt routine. Perhaps the interrupt is happening after you have restored the stack and before you return :-? -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... /> You will see how the interrupt begins much later in the ... in both machines, the keyboard interrupt routine is almost the same.
PFlagsIs there an explantion somewhere of what bits mean what in the printing flags? 1 23658 FLAGS2 More flags. 1 23693 ATTR P Permanent current col…
... been modified so that the interrupt routine tests this flag and if ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... is to write a simple interrupt routine that just does a RET ... . Then make your main routine HALT and wait for it ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... every sprite, I have a routine to erase it from the ... calculate-rotate sprite. So, my interrupt routine usually goes as follows:
interrupt routine to play music, and perform ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... rotate sprite. So, my interrupt routine usually goes as follows:
interrupt routine to play music, and ... />
Your first Sprite routine! Could you share with us ... just the print / screen update routine.
Cheers
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... every sprite, I have a routine to erase it from the ... calculate-rotate sprite. So, my interrupt routine usually goes as follows:
interrupt routine to play music, and perform ...z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... . Push corresponds to interrupt driven keypresses where an interrupt routine sends characters to ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... keep calling that particular ROM routine every 20ms. You'll also ... typically do is put an interrupt vector table from 65024-65280 ... nnnn instruction to my real interrupt routine. Or fill the table with ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... keep calling that particular ROM routine every 20ms. You'll also ... typically do is put an interrupt vector table from 65024-65280 ... nnnn instruction to my real interrupt routine. Or fill the table with ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
The default interrupt mode won't affect your ... normal operations, even allowing for interrupt stack usage.
Without ... suggestion and use your own interrupt routine under IM2, or if you ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... genuinely have to have an interrupt routine (e.g. my one byte ... pulse.
When an interrupt does occur, it PUSHes the ...Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... tear, by waiting for the interrupt ( although this makes it slower ... big going on in the interrupt routine :D )Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... tear, by waiting for the interrupt ( although this makes it slower ... big going on in the interrupt routine :D )[/QUOTE]
I ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... wrote my first non ROM interrupt routine last night-I [I]finally ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... wrote my first non ROM interrupt routine last night-I [I]finally ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... thought about what kind of interrupt routine I'll be using, most ... typically do is put an interrupt vector table from 65024-65280 ... nnnn instruction to my real interrupt routine. Or fill the table with ... , 200 points it to the routine rather than table.[/SIZE]Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... register I accordingly, so the interrupt routine will start at address $fefe ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... br />
As for the interrupt problem (and I know I ... the end of bifrost* own interrupt routine:
POKE ... For example, if your Fourspriter interrupt routine starts at 49152, then poke ... the start of the fourspriter routine.
(Edit: ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... Timmy;608777]As for the interrupt problem (and I know ... the end of bifrost* own interrupt routine:
POKE 62734 ... For example, if your Fourspriter interrupt routine starts at 49152, then ... the start of the fourspriter routine.
(Edit: the ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... as how to call another interrupt routine after BIFROST*, how to replace ... tile mapping with a custom routine, etc.
[*] Changed ...Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
Set the I register to 25. This is within ROM and Legal. When I is set to 25, due to the ROM values of (25*256+255) and (25*256+256) ie. the Word at 6655, a call is made every interrupt to 23842, where i place a JP to your interrupt routine.Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …
... what does the Spectrum's interrupt routine which your BASIC program is ...Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …
... what does the Spectrum's interrupt routine which your BASIC program is ...
