I found it complicated and confusing. Sarcastically dismiss the feedback if you like.chernandezba wrote: ↑Wed Feb 28, 2024 3:05 pm 2 Menus. "several screens" is exaggerated
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Nothing further your honor
Search found 682 matches
- Wed Feb 28, 2024 4:45 pm
- Forum: Emulators
- Topic: ZEsarUX 11 Beta
- Replies: 8
- Views: 272
Re: ZEsarUX 11 Beta
- Wed Feb 28, 2024 2:46 pm
- Forum: Emulators
- Topic: ZEsarUX 11 Beta
- Replies: 8
- Views: 272
Re: ZEsarUX 11 Beta
I think you are exaggerating Are you really serious it’s difficult to get to the menu save screen? :oops: I'm not exaggerating. That STL screenshot took me about 10 minutes to make. Getting to the menu isn't difficult. Getting a screenshot of what I wanted proved very difficult. The problem is that...
- Wed Feb 28, 2024 2:05 pm
- Forum: Hardware
- Topic: New open lower RAM module design (photoessay)
- Replies: 98
- Views: 2778
Re: New open lower RAM module design (photoessay)
However, I think it should be possible to develop the module on a two-layer PCB, and the price difference here is significant. Earlier in the thread you said the price difference at JLCPCB between an order for 2 layer boards and 4 layer boards is about $5. Here in the UK that's less than the cost o...
- Wed Feb 28, 2024 12:20 pm
- Forum: Emulators
- Topic: ZEsarUX 11 Beta
- Replies: 8
- Views: 272
- Thu Feb 22, 2024 10:14 am
- Forum: Showcase your work!
- Topic: Replacement Case for Interface 1
- Replies: 5
- Views: 293
Re: Replacement Case for Interface 1
That's a really nice piece of work, Tom, great job. I was thinking about making something similar to house my recreated ZX Spectrum Expansion System project, but there was a problem I couldn't see an easy answer to: the PCB for a project which is housed in such a case obviously needs an edge connect...
- Thu Feb 22, 2024 10:01 am
- Forum: Hardware
- Topic: Recap Problem.
- Replies: 5
- Views: 270
Re: Recap Problem.
You wait until you get tin whiskers. Then you'll be puzzled.
- Fri Feb 16, 2024 10:49 am
- Forum: Sinclair Miscellaneous
- Topic: Who do you buy your spare parts from
- Replies: 8
- Views: 396
Re: Who do you buy your spare parts from
They say that you can pay through paypal with a credit card if you log in as guest but I just cant see that option on my screen I'm pretty sure it means logging into Paypal as a guest. i.e. you don't need a Paypal account. So make your order at Retroleum, click to pay via Paypal, when the Paypal wi...
- Mon Feb 12, 2024 1:40 pm
- Forum: Programming
- Topic: Beating the C compiler...
- Replies: 22
- Views: 728
Re: Beating the C compiler...
Ah right, I suspected people were doing this unrolled. It just eats in to the RAM, but I think I've got enough space left, plus I can move some of the non-in game graphics in to low RAM. I can probably free up 2kb or so, and I'll give this a go... here is where I find out this is exactly how the co...
- Sun Feb 11, 2024 8:55 pm
- Forum: Hardware
- Topic: Cant load anything
- Replies: 41
- Views: 1138
Re: Cant load anything
Hurrah!
OK, power up into BASIC and try
Code: Select all
BEEP 1,0
- Sun Feb 11, 2024 8:35 pm
- Forum: Hardware
- Topic: Cant load anything
- Replies: 41
- Views: 1138
Re: Cant load anything
i dont think its volume ... im thinking it is a hardware issue - would old failing caps possibly effect the signal going into the machine Here's another thread on the topic on another site. Here's another . It isn't out of the question that a capacitor is causing a problem, there's a bit of filteri...
- Sun Feb 11, 2024 8:22 pm
- Forum: Hardware
- Topic: Cant load anything
- Replies: 41
- Views: 1138
Re: Cant load anything
Are you supposed to hear the noise of software loading from the spectrums internal speaker during loading ? Yes! The tape loader screeching noise is absolutely characteristic of the machine and you should be able to hear it as the tape loads. If you're not hearing that, you're missing out. So is th...
- Sun Feb 11, 2024 8:13 pm
- Forum: Hardware
- Topic: Cant load anything
- Replies: 41
- Views: 1138
Re: Cant load anything
There's a bit of information in this thread about volume and amplification and the options open to you. Probably other threads as well if you search the archives, it's quite a common subject. If you want to investigate your apparent upper memory issue I suggest you start a new thread with a suitable...
- Sun Feb 11, 2024 8:03 am
- Forum: Hardware
- Topic: Cant load anything
- Replies: 41
- Views: 1138
Re: Cant load anything
Your machine is a 48K, the DRAM slots in the lower right are all populated. It sounds like it was sold to you as a 16K because the upper RAM isn't working? You might still be able to load a 16K game, though. What device are you using to play the tape? Spectrums require significant volume from the ta...
- Thu Feb 08, 2024 9:09 am
- Forum: Hardware
- Topic: Contended memory with the Z80 in reset
- Replies: 14
- Views: 699
Re: Contended memory with the Z80 in reset
That's really interesting, I've never heard of a CPU NOP tester...
- Tue Feb 06, 2024 11:11 am
- Forum: Programming
- Topic: Another ATTRibute scroller, But At Pixel Speeds
- Replies: 11
- Views: 813
Re: Another ATTRibute scroller, But At Pixel Speeds
And, once past the 4-pixel position, ... And excuse my ignorance as well, please, what is the 4-pixel position? The original thread suddenly started talking about 4 pixels, which didn't make sense to me because attributes are aligned to 8 pixels. Hence I lost track of that discussion. But clearly 4...
- Thu Feb 01, 2024 9:53 am
- Forum: Hardware
- Topic: Timing differences between different versions of 48K ULAs?
- Replies: 5
- Views: 387
Re: Timing differences between different versions of 48K ULAs?
Some issue one and some early issue two boards have extra daughter boards to correct I/O contention issues. This was then incorporated in later issue ULAs. Some may have escaped modification... Is that what's going on here ? I noticed that auction yesterday, and was rather surprised to see an uncas...
- Tue Jan 30, 2024 12:16 pm
- Forum: Sinclair Miscellaneous
- Topic: ZX Spectrum code on The IT Crowd DVD ?
- Replies: 39
- Views: 1433
- Fri Jan 26, 2024 12:39 pm
- Forum: ZX Spectrum Next
- Topic: ROTW units shipping soon
- Replies: 10
- Views: 813
- Fri Jan 26, 2024 10:21 am
- Forum: Hardware
- Topic: Contended memory with the Z80 in reset
- Replies: 14
- Views: 699
Re: Contended memory with the Z80 in reset
Many thanks for all the help. I'm using an RP2040 attached to the edge connector to sample signals and understand what's going on with the CLK line. Nothing is taking over the machine, and the Spectrum isn't expected to be doing anything useful while I conduct these experiments. I was seeing odd val...
- Thu Jan 25, 2024 7:51 pm
- Forum: Hardware
- Topic: Contended memory with the Z80 in reset
- Replies: 14
- Views: 699
Re: Contended memory with the Z80 in reset
Thanks Mark. Unfortunately, in my attempt at brevity, I didn't quite ask the question I wanted to, which was this: If I assert the Z80's /RESET pin (via a device on the Spectrum's edge connector), and hold that /RESET pin asserted , am I guaranteed that memory contention will never happen and the UL...
- Thu Jan 25, 2024 5:12 pm
- Forum: Hardware
- Topic: Contended memory with the Z80 in reset
- Replies: 14
- Views: 699
Contended memory with the Z80 in reset
If I assert the Z80's /RESET pin (via a device on the Spectrum's edge connector) am I guaranteed that memory contention will never happen and the ULA will never slow the clock from 3.5MHz?
- Wed Jan 24, 2024 1:47 pm
- Forum: Hardware
- Topic: Diagnostics card help.
- Replies: 27
- Views: 1014
Re: Diagnostics card help.
If it's the chip that handles data bit D0, D1 or D2, that's enough for the ROM memory check to fail the 'upper' RAM, the machine should then try to operate as a 16K system. Would it be adequate to clip the data pin on the upper DRAM chip which supplies, say, D0? The system would then see that bit a...
- Mon Jan 22, 2024 4:24 pm
- Forum: Hardware
- Topic: RAM Desoldering Tips
- Replies: 8
- Views: 381
Re: RAM Desoldering Tips
You're doing everything right. My conclusion from my own attempts to get those ICs out is that sometimes, quite often in fact, it's just not possible. A desoldering gun is more convenient than a solder sucker, but it's not a magic weapon. The problem as I see it is that when the IC was inserted, its...
- Mon Jan 15, 2024 5:33 pm
- Forum: Hardware
- Topic: ZX Spectrum - Issue 4B - problem between chair and keyboard
- Replies: 10
- Views: 493
Re: ZX Spectrum - Issue 4B - problem between chair and keyboard
So, booting with the external ROM card sees the Spectrum come up normally? The video seems to demonstrate that? Is the machine stable for that minute or so, in that you can type stuff and make it BEEP, etc? If it seems OK, then that seems to point to a building heat issue. Can you find any device wh...
- Mon Jan 15, 2024 3:48 pm
- Forum: Hardware
- Topic: ZX Spectrum - Issue 4B - problem between chair and keyboard
- Replies: 10
- Views: 493
Re: ZX Spectrum - Issue 4B - problem between chair and keyboard
- then i put an lower memory ic backwards and things got worse so i ordered the lower ram board that replaces the ics Just to be clear, you put a 4116 in with the wrong orientation, then powered up? That would have connected +12V through that IC and to goodness knows where. You might have fried par...