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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…
... , I've probably got a timing constant wrong in the pilot ... , I had success with the +2A's datacorder, and your hi ... -
Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …
... signal as main Z80CPU. But timing of reading/writing bytes is ... line. On ZX48 or ZX128+2A/+3 ran run DMA multicolor ... ZX48 is too little and +2A/+3 ULA use different memory ... -
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…
... /sync, the address of the timing
;; constant used to initialize ... adjust .read_edge's loop counter/timing constant
;; to enforce this ... and successfully loaded on my +2A; the only difference is that ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... changed the approach to my timing codes and have done some ... on NMOS 48k, 128k/+2, +2a/+2b/3.
The ... . Or, just maybe, my former timing codes were sloppy and somehow ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... everyone knew Spectaculator is not timing perfect in its +3/+2A emulation? -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
[QUOTE=aowen;720397]I thought everyone knew Spectaculator is not timing perfect in its +3/+2A emulation?[/QUOTE]
Well, there you go. There is a lot of catching up for me to do, apparently. -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... now you should only run timing critical code in uncontended RAM ... contended memory (except on Spectrum +2A/+3). Moreover, the "rolled loop ... -
NEW GAME: Elixir VitaeOnly 2 weeks after Janosik I have a pleasure to announce my next creation - a logical minigame called [B]Elixir Vitae[/B]. Just like another Polish …
... awkward it even throws up timing differences between the 128K and ... too much trouble with the +2A before either, but this one ... -
NEW GAME: Elixir VitaeOnly 2 weeks after Janosik I have a pleasure to announce my next creation - a logical minigame called [B]Elixir Vitae[/B]. Just like another Polish …
... awkward it even throws up timing differences between the 128K and ... too much trouble with the +2A before either, but this one ... -
Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…
... , it was using the opposite timing pattern to whatever the emulator ... ]
I thought the timing differences were well understood now ... the other. As the +3/+2A/+2B use an ASIC instead ... -
+2a double vision - uncommon problemHelloo - I was helped by Guesser on a previous occasion on a toastrack, so many thanks to him for that! Today's problem is the RGB display from a +2a…
... /> Or is it a black +2A or +2B that uses a ... that used on a black +2A or +2B.
Can ... that it is a digital timing error, not any type of ... -
ZXDS 1.1.0Hello, once again a [URL="http://zxds.raxoft.cz"]new ZXDS version[/URL] is out. The major changes are the custom ROM support and Beta 48 emulation, …
... really like to see is timing accurate +2A support.
Based ... -
ZXDS 1.1.0Hello, once again a [URL="http://zxds.raxoft.cz"]new ZXDS version[/URL] is out. The major changes are the custom ROM support and Beta 48 emulation, …
... really like to see is timing accurate +2A support.[/QUOTE]
2A wish was granted, too. Actually, the timing was the ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... machine uses the late CPU timing.
EDIT: actually, see later ... this is in fact early timing.
[QUOTE]
ptime ... each colored block, which on +2A/+3 should disappear one cycle ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... won't reveal anything on +2A/+3). I have explained what ... after, to make sure the timing didn't change while the ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... models, but obviously not on +2A/+3, so that's already ... BiNMaN's machine showed late timing. But it turns out this ... is all really early timing, which is consistent with the ... explained that the Timex and +2A machines shall not suffer from ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... was in agreement with my +2A except the above.
timing.tap test from [URL="http ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... firmwear modding because of the timing differences and I needed to ... would need adapting for a +2a because of the lack of ... expansion bus but if the timing is the same as the ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... rendering, according to the specific timing characteristics of each machine; or ... and the 48K, 128K and +2A will vary slightly anyway, but ... -
RS232 on Spectrum 128KDoes anyone actually use the RS232 port on the Spectrum 128K? Is there anything useful that can be done with it? I know about the keypad with the Sp…
... lines. Those lines, with correct timing, appear to be RS232 to ... routines or make your own timing routines.
Some uses ... . But you could patch the timing loops of the ROM routines ... that would give 512k RAM (+2A and Pentagon compatible), AY, +3e ... -
Fuse 1.1.1 releasedOn behalf of the Fuse team, I am pleased to announce the 1.1.1 release of Fuse. The changes from the recent 1.1.0 are relatively minor, mostly correc…
... model and run properly on +2A/+3, too... OTOH, I guess ... any software that required precise timing at the time it wasn ... changes to figure out the timing for HAM256 as I didn ... -
ZXDS 1.3.0Hello, I am really glad I can announce one more [URL="http://zxds.raxoft.cz"]ZXDS release[/URL] on this special day. The major new feature is the lo…
... +3 ULA screen switching timing for +2A/+3 and improved Pentagon screen ... timing, too.
[QUOTE=slenkar ... -
Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…
... ) are contended whereas on the +2A/+3 and later the high ... bank 0 or 2 for timing critical code. Since bank 2 ... -
Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…
... ) are contended whereas on the +2A/+3 and later the high ... bank 0 or 2 for timing critical code. Since bank 2 ... -
ZXDS 1.3.0Hello, I am really glad I can announce one more [URL="http://zxds.raxoft.cz"]ZXDS release[/URL] on this special day. The major new feature is the lo…
... +3 ULA screen switching timing for +2A/+3 and improved Pentagon screen ... timing, too.
Patrik[/QUOTE ... -
DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... -bit IDE interface.
[B]+2a Z70830 Issue 2:[/B] This ... I was expecting that the +2A/+3 is also susceptible.
timing diagrams to see if we ... -
The Infeasible GameMy new game will be available early next year. One or two little bits to sort and then I need to play test all the levels. For now, here is a short v…
... ) effect, something not present on +2a/b/+3a/b machines only ...
if you want timing critical accurate emulation I would ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... cannot be reliably replaced with timing routine with no flicker...
2A / +3 to lock up. Pentagon ... -
ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... load cartridge games. Also, a +2A or +3 can load IF2 ... ) but they will have some timing differences. Keep in mind that ... -
Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…
... the 470ohm resistor but my +2A became unstable so in the ... the same origin – where a +2A (Spanish version if I remember ... +2A BASIC mode). In my case case the gate array timing was ...
