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Hidden routine in loading screenAs discussed in another thread, the loading screen for [B]Back To Skool[/B] seems to have a hidden routine (in blue INK and PAPER). It would be inter…
... main block starts loading
-screen memory is contended (means slower and ... the way how code in screen is slowed is pretty ... putting a turbo-loader in screen memory is something what is usually ... is overwritten by data in screen after finishing tape load[/ ... -
Renumbering routinesI sometimes modify programs that either I or others have written and sensibly renumber them - usually 10/10, to make future alterations easier and ma…
... program. As it only uses screen memory then there is always room ... -
Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …
... blue lines running accross the screen.
[/QUOTE]
... like MODE 7 or the screen mode your PC starts booting ... nothing is being read from screen memory - those lines you mention.
I never really used these screen modes, they always seemed a ... -
Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …
... nothing is being read from screen memory - those lines you mention.[/QUOTE ... -
Framerate of Spectrum gamesI was reading a bit about framerates in modern games and it got me wondering about the Speccy. First off I'd hoped to find what framerate my old gam…
... Zx Spectrum hardware always refreshes screen display 50 fps. It can ... the screen display is built in some part of memory (called ... buffer or dummy screen) while the actual screen memory is unchanged. It ... ready it is copied to screen memory.
- games ... -
The 256 colour spectrumIt's amazing what you can do these days. [img]http://sites.google.com/site/pauldunn/multi64.png[/img] D.
... in the Spectrum's memory onto your TV. He ... of the screen, looks in the first screen memory location and ... 't draw the entire screen at once, but takes ... the middle of drawing the screen[/i]. If you switch ... lower half of the screen with different colours from ... -
The 256 colour spectrumIt's amazing what you can do these days. [img]http://sites.google.com/site/pauldunn/multi64.png[/img] D.
... in the Spectrum's memory onto your TV. He ... of the screen, looks in the first screen memory location and ... 't draw the entire screen at once, but takes ... the middle of drawing the screen[/I]. If you switch ... lower half of the screen with different colours from ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... doesn't take up more screen memory. Both of these methods will ... 6.75K to 12K of screen data. Not impossible as they ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... to allow for a 12K screen then you're not even ... yourself type LOAD "" on the screen. Even if the Speccy started ... a mode that needed extra screen memory from BASIC unless the ROM ... in the middle of the screen memory map so the system variables ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... BASIC up past the second screen area. It stores its own ... yourself type LOAD "" on the screen.[/quote]
Providing you set ... a mode that needed extra screen memory from BASIC unless the ROM ... in the middle of the screen memory map for the system variables ... -
Speccy games programmingI've got a question. Where games written in pure machine code or was it a level higher with Assembly language being the choice? I always thought it…
... game with monitor placed in screen memory and man and machine were ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... you put something specific in screen memory. anyway, you can read port ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... you put something specific in screen memory.[/quote]
That would ... the last line of the screen", yes! -
Project OTLA / k7zx (high speed loading)Hello, I am proud fan of zx spectrum (I do not have speccy, but clones (Didaktik Gama, Didaktik M)), I am using portable CD player to load games. Al…
I haven't looked at the OTLA code, but I suspect it wouldn't run correctly from screen memory, since it's highly timing-critical and 16384-32767 is contended memory. -
Little Sprite DemoI've managed to make a little headway with my fooling around with sprites, so I thought I'd stick a snapshot demo thing somewhere for anyone who is i…
... has to be understanding the screen memory although i have not even ... -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... opportunity - of course the extra memory and sound chip were great ... old hat, and maybe the memory contention could have been avoided ... the ability to flip the screen memory from 16384 to 49152) and ... -
What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... or small, what part of memory does it belong to. I ... all key values (start of screen memory, attributes) and compare my numbers ... -
ZX81 more powerful than the Speccy?I have been reading ?The ZX Spectrum Book 1982 - 199x? by Andrew Rollings (thanks again, Andrew - it?s a great read!). There are some comments in the…
... considering that the ZX81's screen memory takes up 768 bytes of ... -
ZX81 more powerful than the Speccy?I have been reading ?The ZX Spectrum Book 1982 - 199x? by Andrew Rollings (thanks again, Andrew - it?s a great read!). There are some comments in the…
... considering that the ZX81's screen memory takes up 768 bytes of ... very well written around the memory limitations. My PC has 1GB ... of memory, and still thrashes the hard ... drive for virtual memory whenever I do even the ... -
zx81 + commodore 1541 drive?[url]http://8bit.yarek.pl/interface/zx81.zx1541/index.html[/url] did anyone build it ?!?! just curious :)
... , using carefully-timed writes to screen memory to change the displayed character ... -
zx81 + commodore 1541 drive?[url]http://8bit.yarek.pl/interface/zx81.zx1541/index.html[/url] did anyone build it ?!?! just curious :)
... , using carefully-timed writes to screen memory to change the displayed character ... -
ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... display alternate frames from different memory banks, I guess? Both being ... anywhere other than the standard screen memory. I mean, there's a ... (e.g. a screen pointer, or a single screen swap bit), but ... could redraw part of the screen for hi-res effects the ... -
ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... things to devote two separate screen memory areas to it though. On ... -
Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …
... ... Just had to ask... If memory wasn't an issue, would ... that for one byte on screen you need about 40 T ... issues like flickering and slower screen memory so you could draw two ... -
Spectrum 2-3 times more powerfull than MSX?![url]http://www.youtube.com/watch?v=2-kI0urN9tI#t=8m18s[/url]
... ), so you can use the screen memory as a character-map or ... the character memory as a full-screen bitmap. I'd ... -
Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…
... Amstrad was having a large screen memory (16 KB) coupled with no ... at least had a small screen memory (and even then a lot ... -
Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…
... Amstrad was having a large screen memory (16 KB) coupled with no ... at least had a small screen memory (and even then a lot ... -
Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…
... from having such a huge screen memory. Games that didn't require ... but this requires tons of memory so it was rarely used ... too required a lot of memory so it was rarely used ... had a vertical sort of screen layout.
Many demos ... -
Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…
... , but was let down by screen memory and bad versions of Spectrum ... -
Spectrum v Amstrad CPC rangeAmstrad seemed to be a rather late starter in the 8 bit micro computer race. I never really saw one outside a shop, only a few people at school had o…
... , but was let down by screen memory and bad versions of Spectrum ...
