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+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... +2A if I switch to special paging mode, with RAM bank 4 (contended ... -
+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... +2A if I switch to special paging mode, with RAM bank 4 (contended ... -
Classics ported or cloned on good ol' SpeccyHi, Spectrumists! I'm a fan of classic arcade games and I would like to know from you what do you think about ports or clones of such games on the S…
... /> I'm currently using +3 special paging mode 0/1/2/3 for ... switch back to normal 128K paging mode R/5/2/7, which ... only need the normal 128K paging setup. But I think the ... -
Classics ported or cloned on good ol' SpeccyHi, Spectrumists! I'm a fan of classic arcade games and I would like to know from you what do you think about ports or clones of such games on the S…
... m currently using +3 special paging mode 0/1/2/3 for ... unusable with +3 allram mode - collide on data bus ... need the normal 128K paging setup. But I think ... br /> 3) true allram mode 16kB (two switchable 16kB ... , but only true allram mode is different = 512kB ram ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
very nice!
Presumably the Stage 1 bootloader could have code to detect +2A/+3 and set special paging mode? -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... detect +2A/+3 and set special paging mode?[/QUOTE]
Probably do ... can do any fancy ROM paging stuff it needs to do ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... blame Phil for the buggy paging emulation in fuse, and Pete ... the +3 is in a special paging mode, does this address your problem ... ,13 @@
machine_current->ram.special = 0;
normal_memory_map( rom, page ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... the +3 is in a special paging mode, does this address your problem ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... an IF2 cart or in special paging mode) you just need to make ... -
GYRUSSJust found this video on youtube...does anybody knows about this? [url]https://www.youtube.com/watch?v=krmSJKE18_A[/url]
Also, I made a version that loaded from disk. It works setting a special paging mode, so it should work in +2A and +3 models. -
Patching RST routines?Hi all, I am quite unexperienced regarding the Speccy and today I made another attempt to make a concept for a SymbOS port to this machine. There is…
... /+2B/+3, which have additional paging modes that allow RAM to ... Pac-Man emulator uses the special paging mode to have RAM pages 0 ... -
Spectrom interface ?Hi all, I got 2 of this devices ... :) [img]http://forest.no-ip.org/wos/spectrom/20151006_151428.jpg[/img] [img]http://forest.no-ip.org/wos/sp…
... also uses the +2A/+3 "special paging" mode, and hardware double buffering. And ... -
128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... to probe the paging to see if it has special paging mode. That's ... contended banks, I write a paging routine with @impomatic which ... be incorporated into your own paging routunes? I dunno. :)
... can upload both bits of paging/detection code if people ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... test is active concern the special paging mode 5. It might seem like ... a previous test performed in mode 5 which sets memory ... paging mode 4 is set. However, seeing as it is actually the special mode ... next time. No changing the paging mode with P, and probably no ... -
Chibi Akumas - Spectrum Port Planned!I'm planning to port my CPC game, Chibi Akumas to the ZX Spectrum! I will be targeting the 128k disk based systems - as this will be the best (and mo…
Does Pentagon have the +3 "special paging mode" too? -
Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …
... a 48k, then it uses special paging mode to distinguish between the 128 ... only need to know the paging architecture :)
Most ... t be an issue probing special paging mode unless they're memory ... you don't trigger their paging ports or an execution ... -
Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3My Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3 is now available for download from: [url="https://c.gmx.com/sizx@gmx.com/DVQXAXrLRl2d…
... +2A/+2B/+3 have a special paging mode, allowing banks 0/1/2 ... separate bank. It's this paging flexibility that causes the program ... -
DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…
... work in very similar paging mode, but can select up ... this 128kB paging port very easy:
- Paging port adress ... new paging mode "DIVIDE128". Systems in this mode (if mapram mode is ... enable also special switching between MAPRAM and NONMAPRAM mode in any ... -
Port 0x7ffd Partial DecodingI'm trying Pitfighter on my emulator and it runs in +2A/+3 mode but crashes in 128k/+2 mode. I traced it down to an OUT instruction which sends 4 to …
... it runs in +2A/+3 mode but crashes in 128k/+2 ... mode.
I traced it down ... in +2A/+3 mode 1FFD is reserved for special paging functions.
Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …
... /> Bit 5:If set, memory paging will be disabled and further ... 0: Paging mode. 0=normal, 1=special
Bit 1: In normal mode, ignored ... .
Bit 2: In normal mode, high bit of ROM selection ...New project: CargandoLeches. Ultraloads with ROMHi This project has started months ago, between decicoder, macleod and me. Uses the best modulation of k7zx (throwing shavings). But this ultraloa…
... modified ROM: these models has special paging that allows RAM in lower ... switch DivIDE to true allram mode and install this rom to ...DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…
... :
If I should do special tests you can tell me ... ESXDOS) rewrite ESXDOS for this paging mode 128kB then extra memory can ... modified divide systems to DIVIDE128 mode.c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…
... trying to load into the paging routine.
[code]
BE44 ... 0: Paging mode. 0=normal, 1=special
Bit 1: In normal mode, ignored ... .
Bit 2: In normal mode, high bit of ROM selection ...c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…
... 0: Paging mode. 0=normal, 1=special
Bit 1: In normal mode, ignored ... .
Bit 2: In normal mode, high bit of ROM selection ... I set 1ffdh into normal mode, select ROM 3 with following ...ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …
... 0: Paging mode. 0=normal, 1=special
Bit 1: In normal mode, ignored ... .
Bit 2: In normal mode, high bit of ROM selection ...Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... quote="Hikaru;921387"]Re extended paging, something like an extra ... for the +2A/+3 special paging modes, as well as ... the paging modes by switching to the currently active mode immediately ...
I've excluded the special mode 011 from testing because it ...Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... #1FFD to the currently selected paging mode
exx
in ... (c),d ;restore normal 128K mode
exx
[/code]< ... denotes the normal 128K paging mode, everything else is special +2A/+3 modes ... thereof twice for all 4 paging windows in the RAM (i ...
