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SPIN & port #FFHow to solve a problem with port #FF on SPIN? This prevent me from creating correct RZX-file with Short Circuit, part 1.
What problem are you having?
Port $FF is an unattached port - it will reliably return $FF on a read in +2a/+3 hardware, and floating bus results for any prior models.
D. -
CPC 464 plus - technical help please.I set up my CPC464plus today. With a cartride inserted, it works. Without a cartridge inserted, it displays just a green screen. I have one cart, …
... Speccies, as someone who has read tons of technical stuff on ... to include a tape player port.. -
CPC 464 plus - technical help please.I set up my CPC464plus today. With a cartride inserted, it works. Without a cartridge inserted, it displays just a green screen. I have one cart, …
... Speccies, as someone who has read tons of technical stuff on ... to include a tape player port..
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Trust me you may have read a lot of documents, but ... -
Screen AttributesNot sure if this is a devolopment question but here goes... In my limited understanding, the 'attribute file' of a speccy is 5800h to 5AFFh and each…
... Kendall wrote:
Have you read the [url="http://www.worldofspectrum ... file is interpretted by the ULA hardware, but what you can ... the display file while the ULA reads it to get > ... -
K-MOUSE gamesDo you want to control speccy games by mouse? Now you have the chance! At [url="http://zx-spectrum.wz.cz/index.php?pg=rubriky%2FZpravy%2Fk-mouse.php…
... , yes. The RZX format stores port reads, and nothing about the ... including the interrupts and the ULA's contention effects, which does ... -
Loading TZX files into a real Spectrum 48KHi all, new to this site but thought I would drop a question in for you knowledgable lot! Basically I have a working (a few minutes ago, will explai…
You must use a MONO cable. I have a +2 and use a tape-faker to do the trick from a Discman, so no problem to read a stereo tape, but if you have a 48K, you should use a mono cable to fit into the EAR port of the Spectrum.
Regards. -
128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…
... 'm confusing a ULA memory read with a Z80 memory read.
The ... it via Memory[16384]. The ULA does the same thing but ... least 7 tstates but the ULA can load a screen attribute ... -
128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…
... 'm confusing a ULA memory read with a Z80 memory read.
The ... it via Memory[16384]. The ULA does the same thing but ... to each other for the ULA and Z80. Connect the buses ... least 7 tstates but the ULA can load a screen attribute ... -
InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…
... routine; the address is read and CALLed by the Z80 ...
On the Spectrum, the ULA is not an im2 aware ... From what I've read there is restrictions on where ... can go. I am also read conflicting views on
... bus and this fools the ula into thinking there is ... -
New release of EmuZWinEmuZWin Version 2.6 Release 1.0 Beta? ? (30-Jan-2005): A lot of changes. Most important are: [+] Formats supported: RZX, SLT. [+] Sound devices sup…
... set breakpoints on memory read/write, on port in/out, and to ... -
Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
... memory areas? I need to read up on a few things ... is different to the Sinclair ULA, your program reports each tstate ... the SCLD differs from the ULA this much as Timex presumably ... -
Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... />
If you read from the EAR port without a cassette playing ... -
Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... must be logic in the ULA that says the level to ... the same bit to the port there would not be a ... -
Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... must be logic in the ULA that says the level to ... the same bit to the port there would not be a ... -
Amiga emu Where i can find good emu for Amiga(any)? [ This Message was edited by: Jet set Z on 2005-01-08 20:29 ]
... />
CKay: Yes! To read an Amiga Game onto your ...
Also, the Amiga can read disks from the PC. *But ... loaded this, you can read a PC floppy thats formatted ... that goes into your Serial port on the Amiga and ... Serial port on your PC. Once ... -
Fast MDR creation...Hi, I still have a load of Microdrives I want to get into mdr files so I can erase them and put better stuff on (like Sabre Wulf) and also to preser…
... little machine code proggy to read a block from the MD ... of memory to the serial port, which would be picked up ... -
Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... write and read abilities. It also displays all the $FE port inputs ... -
Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... be easily modified. Also, the ULA was vastly enhaced, and developed ... which is divided for the ULA and the CPU.
port there's a canon connector ... interface.
The expansion port is simmilar but lacks the ... -
Weird loaders; 1) Why? 2) How? (Curiosity question)Hello again. Sorry to be asking/posting so much today, but I've just arrived here and am plumbing the depths of nearly 22 years of making cups of te…
... higher 32K to avoid the ULA contention issue,which would knacker ... account of the contention on 'port #fe'? If not, why do ... -
Spectrum IDE port addressesWith eight standard IDE ports to address and with the common access to information via the internet I would have thought that Spectrum IDE add-on har…
... 0 blocks activation of 48k ULA (#FE port which is implemented only ... activation of 128k memory paging port
- At least one ... and ZXATASP use 16-bit port access which other interfaces try ... -
Spectrum IDE port addressesWith eight standard IDE ports to address and with the common access to information via the internet I would have thought that Spectrum IDE add-on har…
... and ZXATASP use 16-bit port access which other interfaces try ... port, high byte=IDE register number, in the same way the ULA ... space in the I/O port low byte range.
Press any keyI need to write a z80 function that waits for a user to press any key. As it is possible that the user may be pressing a key when the function is cal…
... /> Yes. As you know, to read *all* the keys at once ... , you end up reading IO port $xxFE instead of the keyboard ...Press any keyI need to write a z80 function that waits for a user to press any key. As it is possible that the user may be pressing a key when the function is cal…
... /> Yes. As you know, to read *all* the keys at once ... , you end up reading IO port $xxFE instead of the keyboard ...Abu Simbel Profanation &emulatorsI recently tried game from subject in Spin, EmuZWin and some other newer emulators and noticed sad fact that it works not, better said controls work …
... stop to preach here, and read things more carefully.
port and the board issue number ...Ghost & GoblinsIn one afternoon which you want to throw the +3 by the window, because the assembler or a inconsistent bug in the code, i take a break and lost the …
Whoah - those GFX are PRO!
Btw, what happened to that castelvania port to the Speccy? It's been ages since I don't read news about such an interesting project.Help with +3 in comaHi everyone Had a spectrum +3 under the bed for some time and when replacing its drive i accidentally connected the 5v and the gnd of the led. Now…
... hope that its not the ULA that is behind all this ... />
I read the post about soldering a new ula and i ... my hands on a +3 ula somehow or is there a ...Necessary +2A ROMsA +3 has 4 roms: Menu/Editor Syntax Checker +3DOS 48k BASIC I understand that a +2A is identical to a +3 but without a disk drive. It also uses …
... games do OUTs to the port that kicks in the other ... get the dreadfull "rain" (or "ula snow" as some call it ...wouldnt it be good if:I know that some guy basicly said he waqs going to do what Im suggesting here but anyway: I was thinking and worring about the future of the spectrum…
... , read/write fat media, s-video out and internal kempston port. I ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... write and read abilities. It also displays all the $FE port inputs ... in emulator. How should I read the screen?
If ...48k spectrum, video problems help neededHi All, I have been browsing this site for a long time and today i have finally registered and am after some help!! I have a 48k speccy and the vid…
... , I was hoping you would read my message.
This ... option A and buy a ULA from you. Thinking about it ...
