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InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…
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On the Spectrum, the ULA is not an im2 aware ... bus and this fools the ula into thinking there is a ... -
Suggestions for games to test emulators?I'm going to be doing a comparision of a few different emulators, and was wondering if anyone had good suggestions of games to use as a 'benchmark' t…
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Not to mention the ULA snow effect it uses... You ... -
Hypersports problem - freezes before 1st event?I am using Fuse on Mac OSX, have tried a few of the available Hypersports in the archive now, but each one appears fine until I start the first event…
... value for how long the ULA holds /INT low for on ... -
Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
... all use the same SCLD (ULA).
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I ... -
Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
... is different to the Sinclair ULA, your program reports each tstate ... the SCLD differs from the ULA this much as Timex presumably ... -
IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…
... the address are significant. The ULA provides the result for all ... to bit 6 of all ULA port reads. With no tape ... -
IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…
IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…
... to bit 6 of all ULA port reads.
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ULA port reads = INs from all ...Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
... no real reason why the ULA would apply a single cycle ... bug in the +2A/+3 ULA, and whether this possibly extends ...Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... the same reason. The Spectrums ULA is not producing the first ... an unknown behaviour of the ULA.Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... must be logic in the ULA that says the level to ...Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
... must be logic in the ULA that says the level to ...Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…
... putting a checkmark next to "ULA snow effect" in SPIN -> ...Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…
... putting a checkmark next to "ULA snow effect" in SPIN -> ...Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…
... putting a checkmark next to "ULA snow effect" in SPIN -> ...s-video SuccessHaving tried the various composite video fixes for the +3 etc, I was left feeling a little cold at the results, and was about to give up my quest for…
... used go back to the ULA or anything like that, so ...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 …
... , anyone looking for TR4/TR5/TR6:
[url="http://www.tubesonline ...Stupid question: How compatible is the +2 anyway?Right, time for a stupid question. I've never really had a +2 or +3 until a couple of weeks ago, got myself a +2 in an almost-new condition. Since my…
... large hardware redesign, with the ULA and some ports behaving differently ...Cant get emu to installHi all, I have just tried to install the z80 emu onto my pc but it came up with this error message c:\wimdows\system32\autoexec.nt. the system file i…
... , but the interface with the ULA rendered the display quite complex ...Cant get emu to installHi all, I have just tried to install the z80 emu onto my pc but it came up with this error message c:\wimdows\system32\autoexec.nt. the system file i…
... , but the interface with the ULA rendered the display quite complex ...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 …
... likely to be a dead ULA, dead Z80 or dead lower ...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 …
... them. Might have a dead ULA, though, in which case you ... 'll need a replacement ULA.
Hopefully that'll ...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…
... /> - 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…
... other brands for components. The ULA was not standard. It had ...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…
... be easily modified. Also, the ULA was vastly enhaced, and developed ... which is divided for the ULA and the CPU.
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…
... form a mask applied to ULA port #FE, so if you ... outputted to the port. The ULA may also mix both EAR ... ones that can damage the ULA, but it can't be ...Speccy mentions in the general media in modern timesHas the speccy been mentioned or appeared or both on TV on much later computer games in recent times. "Worms World Party" has a ZX spectrum map. On…
... main character's (Dink's) ULA in his Didaktik burns up ...Speccy mentions in the general media in modern timesHas the speccy been mentioned or appeared or both on TV on much later computer games in recent times. "Worms World Party" has a ZX spectrum map. On…
... main character's (Dink's) ULA in his Didaktik burns up ...Any programmers interested in writing for a more powerful machine?Apparently not.
... : 272K
ROM: 32K
ULA: 27K 4x 256x192 (8x8 attributes ... -8912 / Beeper
has ULA any features like sprites, fast ...
