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I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
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- It happens when the port address is 0000xxxxxxxxxx01.
- It ... this relates to the actual reading cycle... I'll keep investigating ... -
IN instruction on emulatorsHi everyone I wrote: 10 PAUSE 0 20 PRINT IN 63486 If i press 1, result is 190 instead of 254 (i used FUSE and Spin) If i press 2, 189 (253) i…
... the top three bits when reading from port $fe. Bits 5 and ... are irrelevant when you’re reading the keyboard. You’re only ... -
The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... factors (aside from the obvious reading from port $7FFD and friends) might ... -
Dual joystick interface schematic?Hi! Would anyone have a schematic for a dual joystick interface? Cursor or sinclair would either work. If not, I might try my hand at designing one.…
... from Kempston IN-31. This port is selected so as not ... have his particular interface then reading IN-95 this would clash ... players, a fully decoded Fuller port is probably the best option. -
Kempston Mouse DriverHi Folks, Does anyone know the email of Chris Cowley who wrote the Kempston Mouse Driver in the WOS Archive? Many thanks Paddy
This driver use incorrect reading of mouse button port. Need small fix.
mouse_btn LD BC, 64223
IN A, (C)
OR 252
CP 255
JR NZ, end_pointer
POP BC
RET -
A Yankee in IraqI'm testing the game on the zx next and it currently hangs right after the game starts no matter what timing regimen and contention pattern is chosen…
... in a loop reading the +3 floating bus through port 0x0ffd. I ... now with the floating bus reading through 0x40ff. This should work ... -
A Yankee in IraqI'm testing the game on the zx next and it currently hangs right after the game starts no matter what timing regimen and contention pattern is chosen…
... contention caused by the loop reading from port 0x40ff is causing the ... to be missed in the port read. If I change the ... loop to read from port 0x00ff to avoid the i ... -
Does Survivisection load & play on a real +2a?Hi All, My apologies, another question.. Would someone with a DivMMC and a +2a be able to confirm whether Survivisection runs and plays on it? …
... the standard pins to facilitate reading the extra buttons.
port-version-0705693505084.html
Loading Schemes > 1-bit per 2 edgesHi Guys, I'm just having another look at loading schemes again (a subject that interests me). Does anyone know if there any loading schemes t…
... . It came with a joystick-port adaptor, but if you modified ... the loader to read from port 254, it could load from ... , the Spectrum is capable of reading data from the ULA’s ...Awesome port of Astro Blaster releasedYet another of my arcade faves gets a tremendous 21st-Century port on the Speccy. https://planetasinclair.blogspot.com/2019/10/astro-blaster.html …
... gets a tremendous 21st-Century port on the Speccy.
reading again my whole YS collection ...Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... to extract edges? I'm reading ZX Spectrum documentation where it ... /> 2) When Speccy is reading the port, is there any noise? I ... ? So if I read the port without the tape connected, there ... Speccy documentation (again) I'm reading about tape blocks: A leader ...Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... extract edges? I'm reading ZX Spectrum documentation where it ... what is read when reading the pin also depends on ... set to at I/O port 0xFE (254). The actual ... 2) When Speccy is reading the port, is there any noise ... So if I read the port without the tape connected, ...Keyboard (simultan pressed keys) Test Program in MCode like Vyacheslav Strunov´s Port demo v3.1Anybody here knows of another good Keyboard Tester program (for simultanous pressed keys and in Machinecode) like this: Port Demonstration 3.1 by Vy…
... program reading all keys was faulty, but as Vyacheslav Strunovs Port demo ...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…
... modified to use the correct port instead, but I would like ... to spoil the experience of reading the actual thread :))
Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... a tape recorder's input port and expect a consistent "logic ... on a magnetic tape, when reading it, it wouldn't take ... and the one that's reading it. This also applies to ...What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…
... it dawned on me from reading books and articles that all ... map to the screen and port instructions control hardware peripherals. By ...Non Joystick Games . Why? When? And What are They? Quite a few of the early CCS Strategy games were non joystick (keyboard input only) How quickly did the joystick become standard ? Where (which…
... read it, if you're reading a 'half row' (this I ... a 'half row' per stick/port whereas you need to read ...New Version of MAME Emulator out with enhancements on Spectrum-EmulationNew Version 0.216 of MAME Emulator out with enhancements on Spectrum Emulation: [url="https://www.mamedev.org/?p=476"]https://mamedev.org/?p=476[/…
... terminal connected to a serial port), you can choose which keyboard ... , MAME doesn’t have mind-reading capabilities yet, so it may ...Bit of fun - ToastRack , one change onlyAlthough there's an old "one change only" topic about, I was thinking about the toastyrack 128's earlier. Its actually the only Spectrum model I've n…
... I/O register for both reading and writing that could have ... either a built in network port or a simple RS232 serial ... port.
But Sinclair having ... the unimplemented ULA I/O port bits would do, in order ...Are there any TWIN COMPUTER games or any other twinned software for the ZX Spectrum?I noticed in the PSS Game "Tobruk" that there was an option for the use of 2 Amstrad Micros . The instructions say :- "This advanced version of Tobru…
... /> Pin No. Amstrad CPC Joystick Port
1 Up
2 ... . These are driven low when reading certain keyboard rows. Through these ... . Was rs232 via the joystick port a thing on the cpc?If you had four roms...Just wondering if you were designing a Spectrum from scratch, and you used a 27512 EPROM, which would hold about 4 spectrum roms, what you would inst…
... thinking I wanted an expansion port, and since I'm building ... 1, but I've been reading up and it seems doable ...Need help finding a suitable emulator...Hi All, I've been working on a concept of superformatting a microdrive cartridge, so that a normal interface 1 can store up to 600Kb on a single c…
... up to the Interface1 Microdrive port and achieve the same ... build an extended sector for reading files. (Data Partition) This ... is selected, it should start reading from Logical Sector 1. ( ... .
For emulation, reading the file back correctly would ...Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…
... (computer)"]here) [/url] makes interesting reading. But given that (a) Sinclair ... you use the RS232 serial port, after every byte the system ... be generated on the RS232 port line. This is a hardware ...Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... ; C is always FEh for reading keyboard ports
Read_Keyboard_0: < ... B,(HL) ; Get the keyboard port address from table
INC ... B,(HL) ; Get the keyboard port address from table
INC ...Why so few open source Spectrum emulators?A couple of days ago I started to look into converting an existing Spectrum emulator to Pocket PC (mainly the iPaq) and ran into problems directly. T…
... .e. make it easy to port to any new platform). It ...
