-
Timex 2048 + Interface 2When playing with ZXC3 cartridge (very nice piece of HW from Paul - highly recommended), I connected original Sinclair IF2 to TC2048 and... no joysti…
... interface by CPU. In ZX ULA has OC data outputs (as ... stated in ULA book), so it can 'and ... . Now I recall that keyboard port was also main issue for ... ) due to different values read from FE port.
Need to check ... -
Timex 2048 + Interface 2When playing with ZXC3 cartridge (very nice piece of HW from Paul - highly recommended), I connected original Sinclair IF2 to TC2048 and... no joysti…
... by CPU. In ZX ULA has OC data outputs ( ... as stated in ULA book), so it can ' ... I recall that keyboard port was also main issue for ... due to different values read from FE port.
Need to ... Therefore, when referring to the port #FE, IF2 will be ... -
esxDOS v0.8.5 released (with TR-DOS emulator)Yup, you read right! Now with TR-DOS emulation! More info and download here: [url]http://www.esxdos.org/[/url] Enjoy :)
... ZX - screen raining effect, impossibility read port 7FFD and 1FFD, etc...)[/QUOTE ... the +2A/+3's redesigned ULA, have found a cure, thanks ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... you do an IN on port 023B hex the lower 4 ...
In BASIC the port will 571 decimal. (You'll ... of the bus might get ULA data in them, then put ... calculator, convert to hex, and read off the least significant digit. -
display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... when the ULA has to read from memory or a port - the z80 ... few T-States so the ULA can do its job. This ... occurs when the z80 and ULA are working on the same ... -
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]…
... the lower RAM and the ULA are on the other.
read the "QWERT" row) a keyboard interface plugged into the expansion port ... override the value that the ULA placed on the bus.
Which Emulator supports Betadisk48?Hi out there and happy new year, I'm looking for an emulator to run with my vision1.7 trdos-rom in 48 mode. Unfortunately most emus only support Bet…
... a "Latch" configuration connected to port 255 (FFh).
... printer.
252 (FCH) - Port configuration interface. Since this is ... of TK also activates the ULA. The definition of the bits ... every time a sector is read or written (so the BASIC ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... wants to;
2. "ULA" attempts reading a byte from ... into a buffer register and read from the buffer register as ... , there will be one read of a raster byte and ... one read of an attr byte ... a floating bus on Pentagon ("port #FF" was a common fix ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... wants to;
2. "ULA" attempts reading a byte from ... Lion17 describe (the delay of ULA fetches) sounds much more ... the original machines. However, the port #FF undoubtedly returns the screen ... is always the last value read returned? Does the value become ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... Lion17 describe (the delay of ULA fetches) sounds much more complicated ... the original machines. However, the port #FF undoubtedly returns the screen ... /> You should read that FAQ a bit more carefully. Port #FF was ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... the specified T cycle after ULA (or "ULA" in case of Pentagon ... ]You should read that FAQ a bit more carefully. Port #FF was ... read Russian, but this is one particular hardware mod that adds port ... aware of that information. The port #FF (in sense of attribute ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... INT duration then? If I read the thread right, Lion17 himself ... the specified T cycle after ULA (or "ULA" in case of Pentagon ... aware of that information. The port #FF (in sense of attribute ... childhood reading about the mysterious port #FF (no-one called it ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... , pixels and attributes are always read one after another (there is ... duration properly, like the original ULA did, they simply let it ... time to look at the port #FF schema, but that should ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... time to look at the port #FF schema, but that should ... Spectrum, so the values are read as long as no other ... , it responds to any unmapped port.
As for timing ... at T cycle 17988 after ULA generates interrupt, and change every ...48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... questions about the 6C001E-5 ULA.
Does the screen ... left like the 6C001E-6 ULA? The 5C112E screen matrix looks ... />
Does port FE read 191 like the 6C001E-6 ULA or 255 ... like the 5C112E ULA ...48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... six versions of the Spectrum ULA.
5C102E ... Does port FE read 191 like the 6C001E-6 ULA or 255 ... like the 5C112E ULA ... For the changes to ULA I/O port ($FE) reads, ... the imperfections of the ULA (non-centred screen, ...Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... the right data for the read it's trying to do ... keypresses through a sinclair joystick port is certainly possible though. You ... do the same as the ULA and only consider A0. The ...Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... will be determined by the ULA. Actually, I'm not sure ... if it's going to read joysticks by pulsing them with ... Russia, and just swap the port address in software? Since one ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... software written for the TC2048 (read port #FF to determine which mode ... spectrum with an internal ULAplus ULA fitted ie double contention. :o ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... re-map itself to skim-read from an alternative address, so ... from what ULA+ will do.
A through-port is essential ... />
[B]2. A 2-port joystick interface[/B] that supports ... .
Again, a through-port is essential.
Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…
... reference... As stated before, the "ULA" sees the VRAM as 4x8K ... .
Each data read by the "ULA" reads 32 bits of ... pixel is 'paper 0' is read at the same time as ... 's video memory is dual port, so no more contended video ...Monkey Island On Speccy...I would love to see Monkey Island on the speccy...think it can be done...not as much detail or graphics...but along the same story lines.... What ot…
... an opportunity to create a ULA+ game? This will soon ... Maniac Mansion so I've read that it can be ... such as extra RAM and ULA+? Emulation only is also ... an option if extra RAM, ULA+ and storage is an ... boundaries compared to a structured port. MI would be a much ...Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…
... /> * Breakpoint on read/write to a specified memory address/IO port
ULA has refreshed the display. Although ... display what position is the ULA (the electron beam actually) redrawing ...Issue Two 16K doesn?t like any keyboardI have a strange Issue Two 16K Spectrum here, that doesn?t like any keyboard. With the original keyboard fitted, it boots, but no key works. Okay, I …
... bad ULA I'm afraid - it usually thinks a port read is low ... do except get a new ULA, sorry!
If you ... extra white column in the ULA square at the top (i ...Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…
... /> * Breakpoint on read/write to a specified memory address/IO port
ULA has refreshed the display. Although ... display what position is the ULA (the electron beam actually) redrawing ...Hardware damage due to software?<p>I'm not afraid to ask a stupid question, and I find it incredibly easy to do so in the hardware forum!</p><p>Is it possible to damage your Spectru…
... to avoid clashing with the ULA, so you’re just ... IN from such a port, e.g. port 30 for the Kempston ... that the data that is read would be unusable, which is ... ROMCS space is only ever read from, and do not ... ? (An options to spot port clashes and alert the user ...Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…
... their own magic 8-bit port address, to which they were ... you want to read, then an IN to read from it. The ... -chip implementation of the fabled ULA+ that could just plug into ...Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…
... their own magic 8-bit port address, to which they were ... you want to read, then an IN to read from it. The ... -chip implementation of the fabled ULA+ that could just plug into ... to support it. But a ULA+ board would be nice.Understanding the Kempston joystick circuitHere is the schematics: http://www.retroisle.com/sinclair/zxspectrum/Technical/Hardware/KempstonJoystickInterface-Schematics.php Ok, the 74LS138N …
... is not attempting to read the I/O port address, pin 15 ... CPU reads the I/O port address, pin 15 goes to ... one another. However if the ULA is reading the screen data ... up, the bits in the read byte from the joystick interface ...
