Spectrum Computing

Here is a TZX which prepends @jpnz's fix to the TZX in the db. It works for me in SpecEmu, with flashloading disabled.

G1FTU-SSTV-FIX-COMBINED.tzx

"More compatible" is a less than straightforward concept, and when you dig into it, kinda means "less compatible". The model field and the flags for which additional hardware is connected are great for emulators because they let the snapshot loader reconfigure the emulation to ma...

I was wondering if they may have been promotional disks for retailers It looks like the labels have been put on the top of existing Amstrad disk labels. I wouldn't read too much into that. I have a disk from a retail bundle which also has blank Amsoft labels underneath. https://dl.dropbox.com/scl/f...

.playwav didn't work for me, and that was what I'd been basing my original idea on. Right, CSpect has some known DMA bugs. It's also possible you generated your WAV with some bad parameters. Audacity export is not the best. I exported a sample 11.025KHz mono file as 8bit unsigned WAV, and it actual...

Dot commands work just fine in CSpect. In fact I use CSpect to write and debug them. I suppose you mean that you don't want to use dot commands because you want to package your program as a single file .TAP or .NEX that can be passed on the CSpect command line - emulator-first coding rather than mac...

If you're a retro enthusiast then the devs are your people. Why would you crap on them? It's like going to see a band, and sneakily breaking their guitar. Just don't play the game if you don't want to buy it.

https://i.postimg.cc/Sn7HCZWY/IMG-20230728-115605.jpg https://i.postimg.cc/d75XSLNq/IMG-20230728-115603.jpg Why would bad 4164s cause the whole display to have inverted colours, though? Ah, bad 4116s would cause the stripe, and maybe force set the flash bit. Is the display alternating at the usual ...

It’s not usually an option that you turn on or off. It’s whether emulation of the speccy is accurate or not. It’s possible to do a really simplified emulation that only updates the screen once per frame, and still most games would run ok. But any game that updates the screen with precise timings whi...

As Luzie says, the Next is designed to allow use of a splitter. If you find that you need to plug mouse into the keyboard side and keyboard into the mouse side, you probably need to change the PS2 setting to Keyb , or at least swap it to the other setting than you currently have. You can get to this...

SpecEmu is written in native assembly language, not .NET CIL/Framework.

Stan PM'd me and told me which game it was. It's one of those e-magazine compilations released on +3 disk. There's a bunch of menu stuff written in +3 BASIC. There's a main menu that loads a menu program for each game, and then that menu runs it or reloads the main menu again. The good news is that ...

That makes a little more sense. TRDs are Betadisk/TR-DOS disk images (not related to the +3 model), so perhaps starting a new game resets some of the data by reloading it from disk each time. Perhaps the reloading goes through the $1F10 address because Betadisk puts some buffer RAM there as part of ...

7952 is indeed the location in decimal, which is almost always in ROM on a Speccy. Either this game is for the +3 only, where RAM can be mapped at that address (extremely unlikely), or Poke Finder is telling you porky pies. Maybe it is seeing different 128K ROMs being paged in and out as changes, an...

The TAP version of Action Force II is an unofficial hack that adds AY music by Fuxxoft, but destroys 128K multicolour timing (48K multicolour is ok). The TZX and DSK are official versions with working multicolour but no AY music. Alessandro's TAP files for DivIDE/DivMMC collection contains a TAP ver...

Very nice! I wonder if Pierre is able to share the boot disk image too?

Are there limitations of length of filenames with the Spectrum NEXT? Standard FAT32 long filename limit, which I think is 260. In some individual programs, there may be a limit on the length on the entire path inclluding driver letter and directories. There may also be a limit on the total command ...

Another replacement option is here, when it comes back in stock https://www.sellmyretro.com/offer/detai ... %2B2-21779

The Speccy video signal is tightly coupled to those very same timings that some games and demos rely on. You can do accurate timings and many modern displays won’t sync. And you can bend the timings so that the majority of modern displays are happy. Next 50Hz HDMI originally had accurate timings, bu...

Timings are accurate provided you started with the 4 option for 48K timings, and are running at 50Hz with one of the VGA or RGB options. HDMI bends the spectrum timings so that those displays can sync to the video signal. 60Hz follows standard Timex Sinclair/Chilean Spectrum timings, which have 20% ...

This is a program that loads submodules from disk as it needs them, and saves to back to disk, using the RAMdisk as a temp buffer. It's really designed around the +3 and +3DOS. Not everything is stored in RAM at once, and it’s not dbspshottablE in the way that you’re thinking. You can't just simplis...

Go Faster Stripe is great. I went to one of their early performance filmings at the theatre in Cardiff where the founder works. As a massive Stewart Lee fan, I was very pleased that they basically set themselves up because nobody would film and release Stew's performances. Bit disappointed they're a...

You need to know which DOS/firmware is burned to the FLASH (esxDOS or something else) and which version of it. From that list at divide.speccy.cz there's at least seven different firmwares, each with their own versions. The files you put on the CF card have to match the version of the DOS on the car...

You're quite right, I apologize. SAM BASIC allows addresses between 0..524,287 (512KB) for POKE, and 0..540,672 (528K) for PEEK, CALL, USR, USR$, etc. It does internal math and paging to magically make it seem as if the CPU has larger than 64KB address space. Very cool! 548,886 is indeed out of rang...

A Spectrum Next or N-Go equipped with the onboard Raspberry Pi Zero accelerator can load TZX files at 2x or 4x speed. Often it will even work at 8x speed, but some custom loaders use higher pitched tones, which can be above audio hardware limits when transposed up three octaves. It does this by runn...

the hmpr register is 1e. ive tried poking to 548886 but its out of range. how do i access page 30 from basic? The Z80 only has a 16bit address bus, so all addresses in BASIC and machine code are between 0..65535. That's why paging is needed, so smaller slices of the overall RAM and ROM can be swapp...