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Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... write the value 10h into port 7FFDh. Something like this:
ld BC, #7FFD
out (C), A
ld BC, #7FFD
out (C), A
Music cassettesWas there ever a utility on the Spectrum which when you to play an audio cassette in the player enabled the loading border stripes 'move to the music…
... input just by reading the audio from the tape port. You could ...Detecting presence of AY?I'm working on my first little demo for the ZX Spectrum. At the moment I'm aiming to keep the memory requirements low enough that it runs on a standa…
... write to a port that is only designed for reading. For example ... respond to writes to that port.
Another idea ... 1s (eg $ff). Most partial port decoding schemes rely on detecting ... the Timex machines do use port $ff for internal bankswitching and ...New Game! Uwol '81 [ZX81][img]http://www.mojontwins.com/wp-content/uploads/2012/03/s1.png[/img] Yup, we have ported our most-ported game to date to the good ol' ZX81! Using …
... RAM, not only SD-card reading/saving, not only AY-sound ... also it has a joystick port. Most (all?) of the newest ...New Game! Uwol '81 [ZX81][img]http://www.mojontwins.com/wp-content/uploads/2012/03/s1.png[/img] Yup, we have ported our most-ported game to date to the good ol' ZX81! Using …
... RAM, not only SD-card reading/saving, not only AY-sound ... also it has a joystick port. Most (all?) of the newest ...I/O port adress map of Spectrum and interfacesI'm looking for an adress map of all the used and unused I/O ports for the ZX-Spectrum. Many years ago I designed an I/O board for the Spectrum that…
... use a single I/O port. The technique is put to ... 16 bits to the device. Reading is just the same but ...Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... on Linux. honestly try actually reading the license for once.[/quote ... [/url]:
"If I port my program to GNU/Linux ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
Reading from port $FE produces different results in ... :
[LIST]
[*]Input port $FE bit 7: always value ... and ZX-Spectrum.
[*]Input port $FE bit 6: default value ... TK90X and TK95.
[*]Input port $FE bit 5: usually 1 ...Outrun Europa - In colourAre there any coder's willing to see if we can put the colour into this game as originally intended?
... :[/QUOTE]
I was reading an article about disappointing 8 ... 'd prefer a re-jigged port of the untouchable original Outrun ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... remember it was something about port 254. :)
@Andrew: When ... do you mean? I remember reading that all Brasilian Sinclair clones ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... remember it was something about port 254. :)[/quote]
port decoding of course, because ... ULA is only on port #xxFE, not on ... every even port.
[quote]@ ... you mean? I remember reading that all Brasilian Sinclair ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... 7 from input port $FE. When TK90X is reading screen attributes, the ...Divide CF cardsI have recently got a Divide but I'am waiting for my Compact Flash card to come form Amazon. However, the Divide states that the CF card needs to be …
... original?
I was reading a wiki recently which detailed ... standardisation with regards to IO port numbers but I'll be ...Divide CF cardsI have recently got a Divide but I'am waiting for my Compact Flash card to come form Amazon. However, the Divide states that the CF card needs to be …
... .
[quote]I was reading a wiki recently which detailed ... standardisation with regards to IO port numbers ... [URL="http://www.zxshed ...AY-interface for ZX81 (at last ;) )Hi, it exists finally ;) - compatible with the most standard one - ZonX. [url]http://www.sellmyretro.com/offer/details/Brand_New_Sinclair_ZX81_MrX_A…
... . I recall reading that someone else had done a ZX81 port, but ...Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…
... value is copied to the port register.
I wonder ... the other side the 0x3ffd reading test passes.Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... "table lookup" routine, used when reading an user's ASCII input ... indicates the top byte of port $fe and mask to IN ...Low level microdrive programmingSo I'm on my lunch break trying to find out about low level microdrive programming (without using IF1 ROM). I see one can use port 0xe7 to read and w…
... erase bit or (pure speculation) reading a new non-formatted cartridge ... br /> a) start the motor (port 0xef)
b) set the ... r/w bit (port 0xef)
c) write ... to port 0xe7
d) stop ...
c) read from port e7 (byte-by-byte)
Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …
... interface connected to the rear port, but be warned: this won ... />
Now run a loop reading the interrupt pin. While it ...Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... the original GAL:
- Port FF6F uses positive logic. A ... /> - The same is true for reading. A low level present at ... read at bit 7 of port FF6F. Take into account that ... .
- The bit written to port FF6F stays after the write ...Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... should map EPROM)
- Port FF6Fh write operation doesn't ... absent signal RD in reading from MIDI port
Big part ... only if CPU write to port #FF6F
+ SERIALOUT * SERIALCLK ... ; Log.0 if write to port #FF6F
+ WR
...Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …
... , that disabling ULA when reading FE port will disable tape input too ...Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …
... , that disabling ULA when reading FE port will disable tape input too ... ]
Port FEh is used both for reading the keyboard and ...Steve Wilcox quote in latest 'Retro Gamer' magOn page 7, in a feature on his IOS Spectrum emulator, he is quoted as saying: "The Android market has been 'poisoned' by a number of very shoddy Spec…
... developer say they don't port their games because of doesn ... Android overall. (Or am I reading this wrong?)
Also ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... the Z80's writing or reading upper RAM it will obliterate ... read from an uncontended IO port during the ULA's screen ...Paradroid for C-64, why not in the Spectrum?Reading the special 30th anniversary Retro Gamer, I came across this game which was considered to be the best game for the C-64, and it does not look…
[QUOTE=Ivanzx;655791]Reading the special 30th anniversary Retro ... 'd think that a straight port might have been possible, although ...Kempston detectionI could use some help. This Kempston joystick behaviour drives me mad. I've written a game called Necrospermia recently ([url]http://www.worldofspec…
... bus issue. On Speccys where 'port #FF' works, unused ports would ... area at the moment of reading the port. If it was in ...
