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Interrupt driven code at overclocked pace....Is it possible for a MC coder to do a routine (i.e. interrupt music player, for within/during Basic)if he knows said machine is running at 400 percen…
... do a routine (i.e. interrupt music player, for within/during ... -
Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
How long does the ULA hold /INT low for on interrupt on each of the Spectrum models? -
MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …
... internal register in Z80 CPU (MEMPTR) which value is set or ... which Z80 instructions initialize the MEMPTR and which way they do ... it. Now this MEMPTR register is totally cracked in ... -
MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…
... 've recently been completing my MEMPTR implementation and have written a ... program[/URL] to verify the MEMPTR docs (which are spot on ... -
Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…
... on the data bus at interrupt time, thus meaning that IM2 ... -
MEMPTR: Is it worth emulating?Some advice if you will :) The only info I have on MEMPTR is this document here: [url]http://zx.pk.ru/showpost.php?p=43800[/url] I notice SpecEmu h…
... only info I have on MEMPTR is this document here:
MEMPTR ? Is it just a "geek ... more sources of info regarding MEMPTR? -
Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... ensure that an IM 2 interrupt handler starts always at the ... ,20,21 and 22, each interrupt, and then 19,20,21 ... -
Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…
... been trying to create an interrupt routine for playing AY music ... /> Does the bank switching mean interrupt routines cant be used?
MEMPTR edge casesFor no particular reason, I've finally got round to emulating MEMPTR in Fuse. A few bits which aren't completely clear to be from the [url="http://zx…
... finally got round to emulating MEMPTR in Fuse. A few ... url]:
* Is MEMPTR set on DJNZ when B ... != 1?
* Is MEMPTR set on a conditional JR ... conditional JR)
* Is MEMPTR set on IN register, (C ... the high byte of MEMPTR, it is unaffected by ...MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …
... with its exact rules how Memptr is initialized or changed in ... .info), then in IM0 mode interrupt length is 12 tacts (on ... while Boo-boo worked on Memptr :) ).My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
... (differences in interrupt response across z80 versions, the internal memptr register and ...Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
... pass the Z80 Test Suite MEMPTR test:
[LIST]
[*]DJNZ ... Suite lacks a few MEMPTR tests (indexed access, interrupt behavior, JR, etc ... .) Are out there more complimentary MEMPTR tests ...Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
... Suite lacks a few MEMPTR tests (indexed access, interrupt behavior, JR, etc ... .) Are out there more complimentary MEMPTR tests ...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…
... other, more exotic tests like MEMPTR at the moment but that ... about interrupts-there are 3 interrupt modes, interrupts can be either ...Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…
... 69888 tstates, issue a z80 interrupt and update the display (I ...Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…
... /> I tried setting up an Interrupt 2 but MicroSource disables interrupts ...ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…
... Islands now load (was an interrupt frequency problem).
Latest issue ...ZX Spin 0.4 available for Download.Standard Cut-n-Paste from the CSS post: If all goes well, I'll upload it to WOS on monday. ----------------------------------------- Okay, it's th…
... Block editor
Fixed an interrupt table overwrite bug in the ...ANN: Write Spectrum Games in C with speclib121 Announcing the sprite pack C library for the z88dk C cross compiler available from: [url="http://justme895.tripod.com/main.htm"]http://justme895.tr…
... experiment in registering a C interrupt service routine. The final one ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... LDIR to real screen at interrupt time.
3. Use ...Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... with most of it, but interrupt-based timing routines are more ...Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…
... after the CALL, occasionally an interrupt will get in exactly after ... is in IM1, the default interrupt code in the ROM will ... to IM2 and vector the interrupt to something harmless like a ...[NEW]: Spectaculator 6.0Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…
...
to Cursor, Run until Interrupt, Run to End of Frame ...Fuse 0.6.2 and libspectrum 0.2.1 releasedThe Fuse team is pleased to announce the release of version 0.6.2 of the Free Unix Spectrum Emulator (Fuse) and associated utilities, as well as vers…
... by the user.
* Improved interrupt handling in the Z80 core ...Finishing my Ragnar game...Hi all, Way back then, in my youth, I worked on a game for the Speccy called "Ragnar", which was a 3d isometric style mcoded game written from scrat…
... to work with the frame interrupt (i.e the raster line ... sound (and 4) perhaps also interrupt handling in general?). The help ...
