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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! -
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 …
... we want to write to screen memory after issueing a HALT
reading data from the screen memory.
----------------------------------------------------------------------
The top ... is
needed from the screen memory. As shown above a MASK ... -
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 ... -
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…
... the top third of the screen has that big scoreboard so ... on Spectrum screens (because the screen memory is organised as three chunks). -
IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... on a machine with contended screen memory (it requires too much data ... -
IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... on a machine with contended screen memory (it requires too much data ... -
Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... /> Of course you are using screen memory all the time, when displaying ... anything on the screen.
If you ... conditions, use the rest of memory as well. That would be ... even place your code in screen memory :) It is used very rarely ... -
Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... that the screen has a fixed address in memory - you can ... at the bottom of memory, then the screen memory, then the rest ... ULA fetches the screen data from this particular memory chip (or ... variables stored just after the screen memory, then the BASIC program, ... -
Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... , use the rest of memory as well. That would ... even place your code in screen memory :) It is used very ... used 1/3 of the screen as a collisiontable.
... In my Videopacemulator the screen is set at 2/3 ... items are placed on the screen. When two bits are ... -
DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…
... requires a small amount of memory to be corrupted on loading ... keep the amount of corrupted memory to an absolute minimum and ... less safe than the screen, but keeps the screen looking nice and ... "[/b] - the + indicates to use screen memory instead of the stack). -
DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…
... requires a small amount of memory to be corrupted on ... keep the amount of corrupted memory to an absolute minimum and ... less safe than the screen, but keeps the screen looking nice and ... b] - the + indicates to use screen memory instead of the stack).[/QUOTE ... -
Code that doesn't autorun.I've just been trawling through a load of old C15s and I came across some tapes which have no basic loaders, and don't autorun when loaded. They just…
... likely load by default into screen memory, so you'd see it ... -
DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…
... contention is when writing to screen memory, and there's not much ...
