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Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... bottom of RAM where the screen memory normally sits. The bottom of ... the bottom 16K of memory, where the screen is pulled from, means ... that memory read/writes can ... of the screen being read out affects half of the memory banks ... -
Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... page the alternate screen in at the bottom of memory; only at ... of memory. Add that to a big cache of sprites and screen ... the 8K just above the screen memory since it'll mostly be ... just 8K in the other screen bank. Maybe the game ... , saving a lot of memory. -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... ]Yes, this does briefly alter screen memory but it restores it so ... 16384 as the address because screen memory is the least likely area ... -
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... by putting the loader in screen memory. I soon figured out that ... because this memory is contended, it was fairly ... -
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... by putting the loader in screen memory. I soon figured out that ... because this memory is contended, it was fairly ... routine to work in contention memory. Exactly in a +2A when ... -
Platoon creditsI did have a hand in designing 'Platoon'. Yes, the majority of the design was Simon Butler's but it was me and him bashing ideas together when he was…
... 20) of c64 loading screen artists. Next you'll be saying robin ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... row scheme as the main screen? And do the attributes start ... version of the Spectrum's screen memory ordering system? -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... row scheme as the main screen?[/quote]
Yes!
< ... in Timex hicolour mode, the memory from 5800h to 5AFF (standard ... attribute memory) is not used. There's ... version of the Spectrum's screen memory ordering system?[/QUOTE]
... -
Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... at the end of each line in the frame buffer that ... to the beginning of the line. That would allow it to ... need to insert the next-line jumps for each line at the right ... , add some sprites, insert the next-line commands in the right place ... -
Using FOR/NEXT like 'while'I don't know if this has already been discussed (I did search, but the search engine didn't like the word 'while'), but here's a way of using a FOR/N…
... :
GO SUB FN w(line,while) -or- GO SUB FN ... u(line,until)
with the subroutine ... SUB stack, or else the "next line/statement" system variables. -
Announcing Renegade mod - my gift for Renegade fansYou know that I'm playing a bit with existing games code, adding colour here and there, changing this or that :) This time I'd like to announce my m…
... for the code writing to screen memory.
Then of course ... -
Printing textThis is probably quite a basic question, or there might be something obvious I'm missing. I'm looking for an economical way of printing formatted te…
You might be better off writing your own text printing routine where using a control character moves the text down to the next line without resetting the column number to zero. -
Font hack that was used in a lot of early gamesThere was a little hack for changing the fonts on a spectrum and I remember it being used in a couple of old games on the 48k, it was a sort of ye od…
... when attempting to find the next line. It will work just fine ... your program contains a single line, which is enough for a ... 23758,255
SAVE "test" LINE 1[/CODE] -
BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... attempt to delete line 1 ("1" [RETURN]), the line is not fully ... /> ..which appears to be a line with last character of the ... again to delete line 1, the start of the next line (line 5 for ... me) becomes corrupted (eg: line 5 becomes ... -
running this game in zxspin assemblerHello all I've written this game out in the zxpin assembler. [url]http://chuntey.wordpress.com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-m…
... pointer is* (the 'notebook' of memory address that are CALLed and ... from the screen** right up to the top of memory. Though when ... inserted into the specrum's memory for it), the address you ... stored and running from the screen memory!
[/SIZE] -
FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... from fonteditor to main screen
Some next links:
[url ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... enough, every time you access screen memory, you have 8 possible values ...
tacts of delay per screen memory access.[/QUOTE]
This ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... for random accessess to screen memory during the screen drawing using PUSH we ... further. The memory is only contended during the screen drawing, which ... means that the contented screen accesses can happen only ... 35.2% of random screen accesses per frame, this ... -
Decent ESXDOS manualI couldn't find a decent manual for ESXDOS, so I created one myself: [URL="http://www.benophetinternet.nl/hobby/vanmezelf/ESXDOS%20manual.pdf"]http:…
... time:
Remove the next line as there is another one ... (only BASIC commands do), remove next line from the "System Commands" section ... -
Decent ESXDOS manualI couldn't find a decent manual for ESXDOS, so I created one myself: [URL="http://www.benophetinternet.nl/hobby/vanmezelf/ESXDOS%20manual.pdf"]http:…
... time:
Remove the next line as there is another one ... (only BASIC commands do), remove next line from the "System Commands" section ... -
The first speccy game you ever clapped eyes onMine was Jet Set Willy round an old mates house back in the early 80's, I was mesmerized!
Pssst! I think. On a black and white telly. I loved the way the loading screen appeared one line at a time....! -
How to write self-relocating code using Pasmo?With z80asm, I can write code like this: [CODE] org 0 ; a total lie, but makes the reloc sums work .dest: equ …
... /> you can even use the screen memory and just make the ink ... see the code/chars on screen.. not sure if it's ... -
Mushroom ManNice to see that Mushroom Man has been such a popular new release coming in at [URL="http://www.worldofspectrum.org/bestgames.html"]the top of the ch…
... -code to go to the next line, but after solving that I ... -
Squishing code up nice and small then unsquashing it in assemblyI refer of course to data compression. I've done a search and there are lots of good compressors, but I can't seem to find one that works in assembl…
... fast cpu and lot of memory for doing such things like ... searching strings in memory, searching optimal path, statistical analysis ... 30KB and usually they occupy screen memory to leave as much space ... data have to be in memory at same time.
Squishing code up nice and small then unsquashing it in assemblyI refer of course to data compression. I've done a search and there are lots of good compressors, but I can't seem to find one that works in assembl…
... fast cpu and lot of memory for doing such things like ... searching strings in memory, searching optimal path, statistical analysis ... 30KB and usually they occupy screen memory to leave as much space ... data have to be in memory at same time.
The making of R-Type on the speccy book, free downloadBob Pape, the guy who wrote R-Type on the speccy has made his book, "IT'S BEHIND YOU: the making of a computer game", available for free download: [u…
... the corresponding characters on the screen. It was also used as ... exists only in the live screen memory - there is no back-copy ... -character, to a full back-screen. To render the game, sprites ... , from the back screen to the main game screen, but only where ...Interface 1bisHas anyone on here got a "Interface 1bis": [URL="https://sites.google.com/site/interface1bis/"]https://sites.google.com/site/interface1bis/[/URL] I …
... ; and LF
JR LIN_LP; Next line
;
MOVE_R OUT (ROM ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... remember, it relies on the screen data leaking onto the data ... />
It relies on the screen data leaking onto the data ... the CPU writes to the screen memory.
Greets Ingo.
Poke 23755 & 23756Entering the following few lines of BASIC: [IMG][URL=http://s1286.photobucket.com/user/rebelstarwac/media/Poke1_zpsc2845838.png.html][IMG]http://i12…
... line has a link to the next one, so when you change line ... 1 to line 10, the next line number is still ...
