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LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... "]here[/URL]) describes the detailed timings of contended RAM. It gives ... timings for Z80 instructions that are ... ]" mean in that table of timings? -
4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... only suppose that memory access timings for the 5C112E are slightly ... -
Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... 've been investigating contended memory timings on the Timex Sinclair 2068 ... -
48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…
... also has slightly different screen timings. Some games that draw in ... sets a bit in port $7FFD which disables any further paging ... -
Emulation of ZX Spectrum 128+2 (grey)Please read this thread: [url]http://www.worldofspectrum.org/forums/showthread.php?t=35523[/url] result: exist 3 (or more) versions of grey ZX Spect…
... so with some clever timings you can make it ...
Rading of port 7FFD on ZX128 and grey +2 ... value. And why ? Adress 7FFD is slow (contended):
... uncomplette adressation of port 7FFD:
IN 16381 ... ignore reading from port 7FFD - On this models run ... -
Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... . Tried both 48K and 128K timings with no success. Actually, tried ... toggle bit 3 of port $7FFD, but the next frame following ... -
New SPIN Update released (v0.1c)Hi all (again)! Here's the release for SPIN 0.1c, as detailed in CSS: --------------------------------------- Spin gets another, much smaller …
...
environment, maintaining the 128k timings etc.
It's ... currently selected hardware and the timings for it.
48k Usr0 ... -
ANNOUCE: Spin Public Beta 0.1d now availableWell, after the overwhelming response to the previous announcement here on WOS Forums, I thought I'd best post that SPIN 0.1d is up. Here's the CSS …
... standard ROM loader and ROM timings.
Fixed various bugs in ... -
GRM 128 for saleI've got ZX-Spectrum 128 clone for sale - "Grand Rom Max 128". It is in white metallic case with external keyboard. The computer contains Beta 128 di…
... -in 5,25" disk drive. Timings close to Pentagon 128. Works ... -
Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…
... rely on the machine's timings or special features, doesn't ... -
Pentagon interface news from VELESOFTIt's from Xagon's board. It is about new interface for Speccy - it make Your comp compatible with Pentagon (and not only) and also it gives You up t…
... 6 and 7 of port 7FFD.
ALLRAM mode possibility (see ... ,6 and 7 on port 7FFD.
Intersting thing is that ... ram)
Page switch via 7FFD, like on ZX128.
Higher ... -
Release candidates for Fuse 0.7.0 and libspectrum 0.2.2Hi all. Release candidates for [url="http://fuse-emulator.sourceforge.net/fuse-0.7.0pre1.tar.gz"]Fuse 0.7.0[/url] (and [url="http://fuse-emulator.so…
... and ZXCF support.
* Improved timings in the Z80 core and ... -
ANNOUNCE: Fuse for Mac OS X 0.7.0Following the release of Fuse 0.7.0 is the unsurprising release of Fuse for Mac OS X 0.7.0 which should be available for download shortly at the Fuse…
... bus emulation.
+ Improved display timings.
New Mac only ... -
(Belated) ANNOUNCE: Fuse 0.7.0 and libspectrum 0.2.2 releasedThe Fuse team is pleased to announce that release of Fuse 0.7.0, the associated utilities and version 0.2.2 of the Spectrum emulator support library,…
... bus emulation.
+ Improved display timings.
See the [url ... -
ANN: SpecEmu 2.3 - Minor UpdateHere's a minor update to the SpecEmu emulator - the emulator with an incredibly small filesize for a Win32 application, and backed up with an incredi…
... to some overlooked opcode contention timings.
- Improved floating bus emulation ... cycle "correction" in the display timings.
- Tape support for CSW ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... the Spectrum.
The timings for IM 0 depend on ... -
ScanlinesHere's an excerpt from the FAQ: [quote] Now for the timings of each line itself: define a screen line to start with 256 screen pixels, then border, …
... /> [quote]
Now for the timings of each line itself: define ... -
what extra port for extra memory ? (256K, 512K, 1024K, etc.)I know that Pentagon uses some extra bits from port 7FFD for extra memory pging: - for 512K model, bit 6 & 7 of port 7FFD - for 1024K model, bit 5, 6…
... extra bits from port 7FFD for extra memory pging ... 6 & 7 of port 7FFD
I personally ... that handle directly the 7FFD port, without taking into ... lock the port 7FFD (on +128K/+2) and 7FFD & 1FFD ... I will never use port 7FFD for this.
Port 0x7ffd Partial DecodingI'm trying Pitfighter on my emulator and it runs in +2A/+3 mode but crashes in 128k/+2 mode. I traced it down to an OUT instruction which sends 4 to …
... port address from 00FD to 7FFD (faq:hardware will respond to ... the partial decoding (respond to 7FFD only) to fix it but ...Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
How long does the ULA hold /INT low for on interrupt on each of the Spectrum models?Emulator with frame advance?Are there any emulators which preferably both play RZX files and also (and here's the odd but important bit) feature a "frame advance" button so that…
Are there any emulators which preferably both play RZX files and also (and here's the odd but important bit) feature a "frame advance" button so that I can get exact movement timings and stuff from a game?NEW games for you chaps (and girls too) ;-)Okie, did some .TAP versions of NEW original games that were only released on TRDOS disk format. Some of you might have seen some (one or two are eve…
... /> Mario Islands demo: (use Pentagon timings, otherwise scrolling sux)
[url ...I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... have hardware to check right timings I can only ask if ... someone could check timings of IO machine cycle during ...Fuse 0.8.0.1 releasedI have just uploaded version 0.8.0.1 of the [url=http://fuse-emulator.sourceforge.net/]Free Unix Spectrum Emulator[/url] to SourceForge and WoS, wher…
Fuse for Mac OS X 0.8.0.1A bug fix version of Fuse for Mac OS X has been released soon or already here at WoS and at the dedicated sourceforge project: [url]http://sourcefor…
Compatible SpectrumsFollowing some recent coding exploits I've been thinking about compatibility of various models of ZX Spectrum. Yes, it's a common question on the for…
... the issue of different contention timings to the "original" models. It ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... a question, does anyone observed timings of RAS and CAS generated ...128K Guru requiredThe answer eludeth me, and I seeketh a higher knowledge! I'm in the process of putting together a very simplistic emulation testbench of my laptop s…
... ROM banks, and emulated port 7ffd. I added periodic (ish 50 ...RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…
... 128k and +2:
port 7ffd bits 0..2 select one ... 6 and 7 of port 7ffd are also used to select ... bits 0..2 of port 7ffd. My proposal would be a ...nmi menu for MB02+, new fixed versionDear MB02+ users and all others, on my site hood.speccy.cz you will find a fixed version of nmi menu. There was an error, when loading 128k .SNA sna…
... snap and paging on port #7FFD was 0-7, BSDOS finished ...
