Search found 146 matches
- Mon May 13, 2024 1:24 pm
- Forum: Emulators
- Topic: Issues with emulators for Linux
- Replies: 24
- Views: 418
Re: Issues with emulators for Linux
You also have Clock Signal and MAME which can do Speccy emulation.
- Sun Mar 03, 2024 7:30 pm
- Forum: Games/Software
- Topic: Super rare old Spectrum game discovered!
- Replies: 18
- Views: 906
Re: Super rare old Spectrum game discovered!
It'd be worth checking the screenshot for attribute cells with 3 colours
Great job all the same, though!
- Mon Feb 26, 2024 11:04 am
- Forum: Games/Software
- Topic: The 20 games with a <= 10% rating from all three major ZX Spectrum magazines
- Replies: 16
- Views: 562
Re: The 20 games with a <= 10% rating from all three major ZX Spectrum magazines
Count Duckula 2 was atrocious, but it did (sort of) manage to be physically playable (it's better than the Amstrad version where you stop if you hit the top of the screen, rendering many screens impossible without using the "hero" feature to skip them). Interestingly the tape version (whi...
- Sun Jan 28, 2024 1:32 am
- Forum: Emulators
- Topic: Exporting videos to YouTube
- Replies: 4
- Views: 729
Re: Exporting videos to YouTube
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.
- Fri Oct 27, 2023 1:34 pm
- Forum: Emulators
- Topic: Flashload problems
- Replies: 9
- Views: 410
Re: Flashload problems
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...
- Thu Oct 19, 2023 12:47 pm
- Forum: Sinclair Miscellaneous
- Topic: Fun with RANDOMIZE USR
- Replies: 32
- Views: 2289
Re: Fun with RANDOMIZE USR
It'll be determined by whatever the values of the DE (length) and IX (start address) registers contain at the time.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.
- Thu Oct 19, 2023 11:59 am
- Forum: Sinclair Miscellaneous
- Topic: Fun with RANDOMIZE USR
- Replies: 32
- Views: 2289
Re: Fun with RANDOMIZE USR
Chuntey field distortion on demand
Code: Select all
RANDOMIZE USR 2054
- Sat Sep 09, 2023 2:18 am
- Forum: Brand new software!
- Topic: Zetrix
- Replies: 7
- Views: 584
- Sat Sep 09, 2023 1:36 am
- Forum: Brand new software!
- Topic: Zetrix
- Replies: 7
- Views: 584
- Wed Jun 07, 2023 10:21 am
- Forum: Emulators
- Topic: Javascript spectrum emulator list
- Replies: 12
- Views: 504
Re: Javascript spectrum emulator list
There's also RVMPlayer, which is early on in development and currently only supports the +3 (most likely due to it only supporting disk images and not tapes at present).
- Tue Jun 06, 2023 4:20 pm
- Forum: Design/Ideas
- Topic: If all games were text adventures...
- Replies: 16
- Views: 1219
Re: If all games were text adventures...
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.
> _
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.
> _
- Fri Mar 24, 2023 3:39 pm
- Forum: Games/Software
- Topic: Diarrhea Dan
- Replies: 11
- Views: 520
- Wed Mar 22, 2023 6:02 pm
- Forum: Hardware
- Topic: The case of the missing +2A/B external floppy drive
- Replies: 5
- Views: 238
Re: The case of the missing +2A/B external floppy drive
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...
- Fri Feb 17, 2023 5:58 pm
- Forum: Hardware
- Topic: Pico based Spectrum ROM interface (photoessay)
- Replies: 37
- Views: 1656
Re: Pico based Spectrum ROM interface (photoessay)
Nice work! You can save GPIO by ORing bits 15 and 14 of the address bus, /MREQ and /RD. (if you're not already doing so!)
- Wed Feb 15, 2023 10:58 am
- Forum: Games/Software
- Topic: Gryzor disk release?
- Replies: 70
- Views: 1575
Re: Gryzor disk release?
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...
- Wed Sep 07, 2022 10:58 am
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1249
- Views: 209988
Re: Spectrum memes
(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 ...
- Fri Jul 29, 2022 2:28 am
- Forum: Hardware
- Topic: Toastrack memory paging problem
- Replies: 15
- Views: 737
Re: Toastrack memory paging problem
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...
- Fri Jun 10, 2022 10:29 am
- Forum: Games/Software
- Topic: Which ZX Spectrum game is most deserving of a sequel?
- Replies: 55
- Views: 1849
Re: Which ZX Spectrum game is most deserving of a sequel?
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...
- Tue Feb 22, 2022 11:13 am
- Forum: Hardware
- Topic: PicoDivSD update possible?
- Replies: 5
- Views: 229
Re: PicoDivSD update possible?
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...
- Tue Feb 22, 2022 1:39 am
- Forum: Hardware
- Topic: PicoDivSD update possible?
- Replies: 5
- Views: 229
Re: PicoDivSD update possible?
Have you tried removing the 'DIVSD DISABLE' jumper when the message appears?
- Mon Feb 14, 2022 8:54 pm
- Forum: Sinclair Miscellaneous
- Topic: TZX2WAV alternative...?
- Replies: 9
- Views: 399
Re: TZX2WAV alternative...?
Try adding a pause block with a non-zero length to the end of the TZX. It's possible TZX2WAV isn't closing off the final pulse, and adding a pause block would fix this.
- Mon Feb 14, 2022 6:49 pm
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1209
Re: Fastest way to do a little BEEP
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 ...
- Mon Feb 14, 2022 1:57 pm
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1209
Re: Fastest way to do a little BEEP
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...
- Mon Feb 14, 2022 2:06 am
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1209
Re: Fastest way to do a little BEEP
... 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...
- Sun Feb 13, 2022 1:44 am
- Forum: Programming
- Topic: Fastest way to do a little BEEP
- Replies: 28
- Views: 1209
Re: Fastest way to do a little BEEP
This is pretty short, but so are the beeps!
Code: Select all
; beep
; entry: d = pitch, e = duration
loop0: djnz loop1
xor (hl)
out (#fe), a
dec e
ret z
beep: ld b, d
loop1: ld hl, loop0
jp (hl)