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- by lister_of_smeg
- Sun Jan 28, 2024 1:32 am
- Forum: Emulators
- Topic: Exporting videos to YouTube
- Replies: 4
- Views: 680
If you're upscaling you'll get the best results by using only exact integer scaling, turning off any scaling filters (i.e. bilinear, bicubic, lanczos, spline, etc.), and cropping the border as/if necessary to fit the target resolution.
- by lister_of_smeg
- Fri Oct 27, 2023 1:34 pm
- Forum: Emulators
- Topic: Flashload problems
- Replies: 9
- Views: 409
The ROM loader is enabling interrupts before returning. So there's two small windows (after this EI until you page bank 0 in, and after you page your destination bank in until the DI near the start the ROM loader) where an interrupt could occur and mess things up. I have no idea whether this has any...
- by lister_of_smeg
- Thu Oct 19, 2023 12:47 pm
- Forum: Sinclair Miscellaneous
- Topic: Fun with RANDOMIZE USR
- Replies: 32
- Views: 1677
Van_Dammesque wrote: ↑Thu Oct 19, 2023 12:40 pm
I remember a thread like I started I think on WoS and was told the fake loading was the rest of the ROM being read probably continuing into the RAM.
It'll be determined by whatever the values of the DE (length) and IX (start address) registers contain at the time.
- by lister_of_smeg
- Tue Jun 06, 2023 4:20 pm
- Forum: Design/Ideas
- Topic: If all games were text adventures...
- Replies: 16
- Views: 1159
WELCOME TO SQIJ!!
YOU ARE IN A DARK CAVERN. THERE ARE EXITS TO THE EAST AND WEST.
WHAT NOW?
> E
YOU CANNOT MOVE IN THAT DIRECTION.
> W
YOU CANNOT MOVE IN THAT DIRECTION.
> N
YOU CANNOT MOVE IN THAT DIRECTION.
> S
YOU CANNOT MOVE IN THAT DIRECTION.
> _
- by lister_of_smeg
- Wed Mar 22, 2023 6:02 pm
- Forum: Hardware
- Topic: The case of the missing +2A/B external floppy drive
- Replies: 5
- Views: 238
https://github.com/konkotgit/PLUS-2A-FDC-LIGHT I built one of these, works great with Gotek, 3.5" PC drives and the Amstrad FD-1. They're pretty simple, because although the +2B is missing the disk controller circuitry, it does still has the address decoding logic for it, and as mentioned earli...
- by lister_of_smeg
- Wed Feb 15, 2023 10:58 am
- Forum: Games/Software
- Topic: Gryzor disk release?
- Replies: 70
- Views: 1571
Watch out for the fakes. This one can be identified by the barcode which is the same as the tape version: https://www.etsy.com/uk/listing/1058638274/spectrum-128k-3-disk-gryzor-ocean?show_sold_out_detail=1&ref=nla_listing_details Kinda annoying that they are reducing the already diminishing num...
- by lister_of_smeg
- Wed Sep 07, 2022 10:58 am
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1238
- Views: 208729
(Unable to resist replying -technically- to a meme from August). :geek: Methinks the fake-Z80 in the Gameboy has a Zero Page addressing mode. :mrgreen: (Although it is actually page 0xFF, not 0x00. And it appears they usually wasted most of it on memory mapped IO). :roll: Speccy would have used it ...
- by lister_of_smeg
- Fri Jul 29, 2022 2:28 am
- Forum: Hardware
- Topic: Toastrack memory paging problem
- Replies: 15
- Views: 735
No, he means that there may be a problem with IC29, which is a Programmable Array Logic (or PAL) chip. It’s known as type “10H8”. The bad news is that these are no longer made :( The worse news, is that their replacements from most manufacturers, GAL (Generic Array Logic) are also obsolete :( Can a...
- by lister_of_smeg
- Fri Jun 10, 2022 10:29 am
- Forum: Games/Software
- Topic: Which ZX Spectrum game is most deserving of a sequel?
- Replies: 55
- Views: 1840
My take on Renegade IV: A New Beginning would be to still have the time machine story going, but using the Target Renegade engine (the best, IMO, although I'll happily settle for the Renegade one) and Renegade goes back in time to 1989 Manchester, where he finds everybody responsible for creating a...
- by lister_of_smeg
- Tue Feb 22, 2022 11:13 am
- Forum: Hardware
- Topic: PicoDivSD update possible?
- Replies: 5
- Views: 229
You may need to unprotect the EEPROM first: You could try using this guide . I couldn't find the '1.TAP' or the '2.TAP' on Piotr's site, but I'm pretty sure '1.TAP' refers to the EPROTECT utility available here . Use the 'ESXMMC.TAP' from your new ESXDOS zipfile (i.e. the latest version from the ESX...
- by lister_of_smeg
- Mon Feb 14, 2022 6:49 pm
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1204
The play loop NOT being a multiple of 8T is the most important factor if running in NON-contended memory, since all the other factors (related with contended memory don't apply). Indeed, adding a RET Z after the OR C should fix the 8T alignment. Which is nice, because it wouldn't actually increase ...
- by lister_of_smeg
- Mon Feb 14, 2022 1:57 pm
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1204
Oh it's noticeable... ... I never listened to such a difference. There must be something wrong with that code or the emulator. Either Interrupts or assuming that the same memory pages are uncontended in every machine or something like that. Can you share the code, for us to take a look ? Did you tr...
- by lister_of_smeg
- Mon Feb 14, 2022 2:06 am
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1204
... Also, you'll get a little distortion with that method on models which are subject to I/O contention, because the loop will take longer when the ULA is drawing the screen than when drawing the border. That is barely noticeable, since it only happens in between transitions of contention and non-c...
- by lister_of_smeg
- Sat Feb 12, 2022 8:20 pm
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1204
Fine, @utz, it's like mine but with less bytes, congrats. But there's something odd... these routines make beeps not like ROM ones, but like the intro of Skool Daze: Do you have interrupts enabled? Also, you'll get a little distortion with that method on models which are subject to I/O contention, ...