Search found 98 matches
- Tue Apr 19, 2022 3:09 pm
- Forum: Sinclair Miscellaneous
- Topic: Are we the baddies?
- Replies: 0
- Views: 142
Are we the baddies?
Or maybe even more disturbing, were our parents those, in case they bought the machine? Ok, this is not a Sinclair thing strictly and the evidence it cites is an Apple commercial, which I don't really get the gist of, but please bear with me. The data this article presents, surely demands an explana...
- Sun Jun 28, 2020 1:10 pm
- Forum: Other Retro Stuff
- Topic: Here we go again .. and again ... and again ...
- Replies: 12
- Views: 2141
Here we go again .. and again ... and again ...
Does anyone keep count off the number of retro waves we've been through?
http://www.asahi.com/ajw/articles/13460000
http://www.asahi.com/ajw/articles/13460000
- Sat Jun 20, 2020 5:35 am
- Forum: Hardware
- Topic: edge connector measures
- Replies: 20
- Views: 2438
Re: edge connector measures
Wikipedia on ISA simply refers to "standard edge connector sockets". So it may be a quasi-standard which is older than dirt.
- Mon Jun 15, 2020 1:00 pm
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1216
- Views: 197436
Re: Spectrum memes
This game's as difficult as running on stilettos through the jungle. You've been warned, Bro.
- Mon Jun 15, 2020 12:52 pm
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
That looks absolutely delicious Alessandro, ... As does every food picture he posts. To dangerous for me though. My stomach might become artsy and spoiled and refuse to function properly when going back to chips right out of a bag. ... but there's not enough insulin in the world for me to have a sl...
- Fri Jun 05, 2020 5:30 pm
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1216
- Views: 197436
Re: Spectrum memes
It's a weapon of course.
- Wed May 13, 2020 12:35 pm
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1216
- Views: 197436
Re: Spectrum memes
I still don't know if this counts as a mem, but it is definitely about overpriced, vintage silicon
- Sat May 02, 2020 7:05 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
not hardware sprites but rather object descriptors (likely including the sprite data) OOP-Think in assembler than. IY is used to access system variables (and due to a bug, it needs to point at them all the time if the interrupt mode 1 is allowed) This I admit is some reasonable use, so that you can...
- Sat May 02, 2020 6:35 pm
- Forum: Sinclair Miscellaneous
- Topic: Conway
- Replies: 16
- Views: 2629
Re: Conway
Those types of bugs ... There all seems to work first, but then there arises some ephemeral strange behaviour under certain conditions. I hope this is correct now. ORG $8000 ; UP: DEC H ; Up one pixel (assuming within chr square). LD A,H ; A:= high part of address. OR $F8 ; Use only bits 2, 1 and 0....
- Sat May 02, 2020 3:33 am
- Forum: Sinclair Miscellaneous
- Topic: Conway
- Replies: 16
- Views: 2629
Re: Conway
Macro-Life by Toni Baker The link to archive.org there only has the main text of the article without the source code. So I took the freedom to adapt it to be compilable by zasm ORG $8000 ; UP: DEC H ; Up one pixel (assuming within chr square). LD A,H ; A:= high part of address. OR $F8 ; Use only bi...
- Fri May 01, 2020 4:03 pm
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
How about you can't get access to a high efficiency mask because they're not in stock, and when they do come into stock they are £150 each, and you don't have that amount of money left in the bank. This is not the situation I see online, but I don't want to weasle out here. So depending on the kind...
- Fri May 01, 2020 3:52 pm
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
Of course one other aspect, is the people being too afraid to go out to work. In the U.K. various workplaces have suspended some or all operations even though they were not required to do so. It’s likely that the government will want these operations to resume along with the easing of the current r...
- Fri May 01, 2020 3:37 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
I find coders arguing quite an amusing thing to watch, that's because I've always sort of imagined (being a complete ignoramus in this field) that there shouldn't be any room for manuever. Well sure, we only need a couple of Next or other hardware emulation, where we can run different CPU-designs a...
- Fri May 01, 2020 2:10 pm
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
I succumb to the implicit reminder viewtopic.php?p=35706#p35706 that we are not supposed to discuss politics too much.
- Fri May 01, 2020 1:02 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
... the relevant Z80 machine code instructions work fine without crashing the screen, as long as you don’t do something silly. I think, I had this in mind ZX80/ZX81 I/O Ports Output to Port FFh (or ANY other port) Writing any data to any port terminates the Vertical Retrace period, and restarts the...
- Fri May 01, 2020 10:33 am
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
The trouble with masks is that you really should have to define which category is being debated over. There's also the psychological message, saying to people you recognise there's an issue and you're making an effort to help keep people safe. That's right, but if you wear a mask, what is the point...
- Fri May 01, 2020 9:00 am
- Forum: Sinclair Miscellaneous
- Topic: Spectrum memes
- Replies: 1216
- Views: 197436
- Fri May 01, 2020 8:08 am
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
- Thu Apr 30, 2020 8:43 pm
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
Lockdown is becoming less strict here but the general impression is still this one... If it wouldn't sound cynically, I'd say, thanks for having been our test area. Data from Italy suggests that not getting infected is a real lifesaver. https://wellcomeopenresearch.org/articles/5-75 i.e. the hypoth...
- Thu Apr 30, 2020 8:21 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
System designers can use memory mapped I/O on a Z80 system if they wish. I would be hard pressed how a CPU using memory could deny this. Some ZX81 expansions used I/O that was memory mapped. There was plenty of room though. Who needs a shadow ROM? Wait a minute. OUT on a ZX81? Wasn't the screen cra...
- Thu Apr 30, 2020 11:57 am
- Forum: Sinclair Miscellaneous
- Topic: Specchums and the coronavirus.
- Replies: 395
- Views: 73507
Re: Specchums and the coronavirus.
Would anyone else care to admit they're doing fine under lockdown? I'd say I'm doing ok, but if it helps I'm ready to admit, that I'm aware I'm privileged. Others have it real hard. E.g. there are elderly or otherwise disabled peolpe living here, who depend on community and other social services, w...
- Wed Apr 29, 2020 2:16 pm
- Forum: Programming
- Topic: Screen Memory - Moving screen address up one line
- Replies: 14
- Views: 3280
Re: Screen Memory - Moving screen address up one line
After some study the arrangement makes sense. If you are writing software with text output, having a display organised into character rows of 8 pixel lines is useful. But is this really the reason? Has anyone ever asked any designer of the machine? I mean, it seems to be a question which urges itse...
- Tue Apr 28, 2020 9:19 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
Except that the PC by convention moves forwards too! Could as well go the other way too. Apart from the fact, that the PC is usually not a register used to manipulate what is there. There darn well should already be something sensible there. The design isn’t inherently dangerous. My code detects wh...
- Sun Apr 26, 2020 6:58 pm
- Forum: Hardware
- Topic: Is it evil to downgrade a Spectrum...?
- Replies: 16
- Views: 2394
- Sun Apr 26, 2020 6:24 pm
- Forum: Hardware
- Topic: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
- Replies: 42
- Views: 5028
Re: So the Z80 is an improved 8080/8085, but what about LD A,(MN)?
except it's not just for one page :P I'm willing to compromise. Of course the Z80 designer can not be held responsible for Sir Clive's decision, to offer no hardware sprites. In connection with memory mapped hardware which needs more than one address, the (IX+n) stuff actually seems convenient. On ...