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Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... much better if the original 128 had the ability to page ... ]
RAM, Z80 and ULA have got to be the ... -
PROBS : Building a Spectrum +2 into a custom caseHi guys, I’m rebuilding my Spectrum +2 into a new case at the mo (an Acorn A410 case to be precise). I’ve got the motherboard in which h…
... both main Spectrums: 128+ with +D and ULA Fixer in a mini ... -
CHROME: a new ZX model! :)Probably You know already about 'last days news', but well... ;) Such informations are so important that I'll put it here: here is a news about n…
... is the ULA emulated - is timing compatible with the 128, Pentagon, is ... -
Sound DreamJust daydreaming, don't beat me for this, if any of you assembler guru's (especially emulator developers) ever are in need of new ideas, it would be…
... /> - nearly-perfect emulation of 48,128,+2,+2a,+3, Pentagon, Scorpion ... . Although we do provide Pentagon *timings*, when the other machines are ... -
new programmer needs information hi , i have been learning c++ for a while and am trying to make games using windows but being 28 and nostalgic , i thought it would be fun try and f…
... has only one custom chip: ULA, and it is responsible for ... if you have a Spectrum 128, the memory banks are paged ... -
COVOX works?My Sprinter "simulates" a COVOX soundcard at port 4Fh, but I don't know how to use it! Can anyone explain to me the process of programming it? (To be…
... .. or to say it better: ULA provide one bit D/A ... ....
covox:
write 128 to port where is covox ... -
Problem with RealSpectrumWhy am I having difficulty getting certain games to laod in RealSpectrum? The game seems to be loading ok then the screen goes black and nothing hap…
... with different timings, but could someone with some real Speccy 128 models ... -
Emulation accuracy and how it affects softwareHi folks. I was thinking of bodging together a rudimentary Spectrum emulator myself, not as a competitor to the other emulators, but as an integrate…
If anybody knows demo or game for original Spectrum48 or 128 (+2, +3 also accepted) with effect similar to Rage demo for Pentagon? Or ULA did not allow output border with 1 TState (2 pixels) accuracy? -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... * How long does the 48K ULA hold /INT low?
* ... this is generated by the ULA every 69888 tstates, which ... an interrupt occurs, the ULA pulls the /INT pin ... .
The timings for IM 0 depend on ... routine finishes before the ULA has pulled /INT high ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... -obvious consequences:
...
The timings for IM 0 depend on ... the routine finishes before the ULA has pulled /INT high again ... interrupt finished just as the ULA pulled /INT low, the EI ... -
EmuZWin 2.5.0.1Version 2.5 Release 1.0 (10-Jun-2004): a lot of changes and fixes in ??? Map Builder ??? GFX Editor ??? Loading & Saving ??? Sound & Video ?? Speed…
... end, we've had pentagon timings in there for a long ... . A small bug produced some ULA snow (I can't believe ... -
Starion Countdown in emulatorsThe Starion coundown is only fully visable in Real Spectrum (dos 376, 308 86Hz)
And in Fuse (0.7.0) as well.
I'm not sure it's really a "ULA bug" that it doesn't work on the 128K; the timings are just different and Starion doesn't account for that. -
Does ScanLine[0] have a left border?My emulator couldn't handle Cobra or ShortCircuit so I added some rough port FF values. I now want to make it a bit more accurate. The FAQ gives me a…
... ?
[/quote]
The ULA will be outputting the current ... the "base point" for the timings in the FAQ is taken ... the Pentagon's significantly different timings with respect to this). -
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…
... designing and developing the Spectrum 128 to create a super-cheap ... /> - Kempston interface built-in.
- ULA developed by Texas Instruments (not ... -
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…
... components. The ULA was not standard. It had different timings thus caused ... -
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…
... of designing the ZX Spectrum 128. They claimed that as they ... developed the 128 hand to hand with Sinclair ... be easily modified. Also, the ULA was vastly enhaced, and developed ... which is divided for the ULA and the CPU.
Longest Game Loading Time................Hi peeps.... What game do you all reckon was the longest loading time?...I know alot of 128k games took ages cause of levels being loaded all at onc…
... a complete load on a 128?
[/quote]
Yep ... go ahead and take some timings for the evil that is ...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 …
... is not present in normal 128's (and grey +2). With ... get the dreadfull "rain" (or "ula snow" as some call it ...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 …
... tried changing your Z80 or ULA or anything? Either of those ... know why my Spectrum 128+ has an AMSTRAD ULA...? How long did ... Amstrad make Spectrum 128+s for ...Turbo baud rates, pulses length for +50%(2250)?I need the 0-bit and 1-bit pulse lengths for 2250 baud rate. Also, a table with pulse lengths for upto +100% (and beyond) would be very useful to me…
... the ramsoft document, ALL zxtape timings are written according to a ... /> So to get the correct timings for tapes pre 1986/87 ... to playback on a 128 correctly, you either do,
Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... machine than either the Spectrum 128 or the Pentagon. (For ... either the Timex or the 128 addressing.
[/quote]
... be more interested in pentagon timings for instance. As a ... clone wishlist:
- 128/pentagon timings (selected by some out)
Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... clone wishlist:
- 128/pentagon timings (selected by some out)
Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... TC2048 has much closer timings to the original ULA machine than any ... , presumably Sinclair gave Timex the ULA schematics along with the license ...Longest Game Loading Time................Hi peeps.... What game do you all reckon was the longest loading time?...I know alot of 128k games took ages cause of levels being loaded all at onc…
... a complete load on a 128?
[/quote]
Yep ... go ahead and take some timings for the evil that is ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... to include the Timex SCLD (ULA) in the portable Speccy. This ... left it out of the 128.
[/quote]
I ... on the radar when the 128 came out. A former Timex ... cars and the Z88. The 128 was mainly designed in Spain ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
...
[quote]
The 128 was not developed in Spain ... natural extension to the ULA that can be done ... much hassle. The original ULA fetches two bytes per memory ... that without changing the ULA core much at all ... video from the existing ULA would come up with ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... natural extension to the ULA that can be done ... much hassle. The original ULA fetches two bytes per memory ... that without changing the ULA core much at all ... video from the existing ULA would come up with ... a missed opportunity for the 128...
So ...Faulty 128Need some help here. I've got a 128+ that won't boot to the menu. It just displays a load of rubbish on the screen. Here's an example of what it does…
You could enter that picture for next years turner prize. With the 25000 quid you could buy a load of 128+'s
Seriously though it looks like bad ram or a fried ula to me.Sound mod for AY audio chipsHi again. This is a repost. I posted it in the misc forum a while back but it definitely should be in here. I was totally pissed off with the crap…
No idead about that, I would guess the 128 & 2 ULA is different from the 48k, though the pinouts might be the same.
