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Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... (B=0x01)
Contended memory... passed
High port contention 1... passed ...
High port contention 2... passed ... -
Spectrum30 Show in Cambridge, 08th-09th September 2012Hello Spectrum-fans, after many months of preparation we now proudly present what will be the biggest Spectrum venue of the last 20 years. We manage…
... once you run into the contended cycles it all lines up ... for the 128K might not port back, so I always start ... side the memory isn't contended, but on the downside - there ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
...
LDIR... failed (0x7f)
Contended IN... failed (0x7f)
Floating ... (0x38)
Contended memory... failed (0x7f)
High port contention 1... failed ... (0x7f)
High port contention 2... failed(0x7f)
JSpeccy v0.90Hi4all, A new JSpeccy version has been released at my project webpage. This new release have many corrections, some optimizations and a few new feat…
... page at 0xC000 is a contended bank. So if it's ... not a contended bank you wouldn't get ... conditionals, reg I value & contended page, but don't resets ... crash on paging port only happens when the port is read. That ...DIY AY for 48k schematicHello! I can't seem to find a diy schematic for attaching AY to 48k so it gets 128k compatible sound. I see offers to sell ready made devices, but n…
... are connected to the expansion port on the original ZX Spectrum ... is [B][I]interrupted during contended memory access[/I][/B]. This ..."The Amazing Rocketeer", compatible with real hardware?I've managed to create a physical copy for myself of [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0017643"]this game by John Fotou[/URL] bu…
... it does naughty things with port 0x1FFD it will only work ... and B. If it requires contended I/O it will only ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... /> Doing an OUT instruction to port 8189, in which bits 0 ... routine can be placed in contended page as ay handler most ... and keep current state of port $7ffd. make changes to value ...Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.
OK Guys, I've updated the TAP version to include digital audio by default, and moved the player code to Uncontended RAM making it sound much better.
I've also made the IDEDOS / +3 disk version which includes a cheat menu and in-game level skip ...Joystick Interface with built in RAM expansion?Is there such a thing as a RAM pack with a joystick interface built in?
... , switched with an I/O port by using OUT (31),banknumber ... fact, it had an IN-port at adress 31 that could ... without having to worry about contended memory, ULA adressing, etcetera ...TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... there's a 'bug' in port $FE — updating the 'MIC' bit ... machines when neither memory or port I/O is being accessed ... range of $4000-$7FFF are contended, or just the even numbered ... of IN from an unattached port ('floating bus').
[*] Details on ...TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... machines when neither memory or port I/O is being accessed ... range of $4000-$7FFF are contended, or just the even numbered ... of IN from an unattached port ('floating bus').
[*] Details on ...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 picture shows a contended write to port FF3Bh. Cycle T1 ... is not contended, but cycle ... /O ports must be contended, as there's no ... to know when a port is contended, it has to ... without losing the attribute port. To support SpecDrum for ...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…
... I/O ports must be contended, as there's no ... ULA to know when a port is contended, it has to decode ... be a fourth option: contended even I/O ports and ... odd I/O port accesses are not contended, as far as ... .
Even if contended, IN FFh could be emulated ...Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... fix more bugs. Reading from port 7FFD is not so big ... IM2 table is in slow(contended) ram. GAL chip use one ... games/software using reading from port 7FFD or 1FFD ?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…
... adopted the "all ports are contended" approach, which means that I ... be contended or not, and I've added a "real" port at ... -colour display routines, that uses port FFh to synchronize themselves with ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... emulates a TK90X for contended memory and contended input port *FF, but not ... for "snow effect NOP" and contended input port ...Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
... same contended memory rules as I did for the RAM/port IO ... (I appreciate it's never contended)?
How do you ...Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
... same contended memory rules as I did for the RAM/port IO ... (I appreciate it's never contended)?
[/quote]
No ...Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
[QUOTE=Korinel;707676]I implemented contended memory simplistically but I'm ... write (by byte)
Port read
Port write
[/QUOTE ...Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... is often used only one contended ROM chip (rom 64kB or ... can see - bit D4 of port 7FFD switch 16kB rom between ...ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... that doesn't have any contended memory and the cpu clock ... ), he wanted the SPI output port to have the byte just ... /O operation to a uncontended port uses 4 cycles (in any ... and simply have your SPI port to work so that the ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ,5 and 7 are all contended. Expect an extra delay of ... or executing code in a contended bank, your execution time will ... .
IO port $fe is also contended, but I'll leave ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ) don't cause problems, single contended byte writes are neither here ... />
[quote]IO port $fe is also contended, but I'll leave ...FREL Comcon Programmable Joystick Interface not working on 128k but on 48kAnother day, another problem :-) My FREL Comcon Programmable Joystick Interface [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000070[/url]…
... interface plugged into the expansion port can force the relevant data ... proper multiplexing logic for the contended ram so the resistors are ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... a factor; if the AY port is contended, timings become harder to ...Port $28FF. Why 28?Testing floating bus behaviour for ZXUno, I've found that both Cobra and Arkanoid use this specific 16-bit port: $28FF. What is so special about putt…
... Reference"]The address of the port being accessed is placed on ... as an attempted access to contended memory and therefore introduces a ...FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... especially when executing and accessing contended memory. Nowadays, I expect ... supposed to work over serial port.
There ... unix serial port because GDB expects serial port to connect ... to provide a virtual serial port. The difference is that, ...FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... , especially when executing and accessing contended memory. Nowadays, I expect a ... to Fuse through a serial port, there's such a thing ... to provide a virtual serial port. The difference is that, whereas ...
