-
1984-2014here I will account for my journey through games released thirty years ago, just like last year for 1983 games, and you can do the same.
... www.worldofspectrum.org/showscreen.cgi?screen=screens/in-game/f/ ... certain objects - a springboard to jump to the next platform, a ... collection (each piece has to be collected in a particular ... /> If you get the chance to copy/paste your review on Spectrum ... -
Outputting debug trace to RS232 (assembly)Hi Guys, I'm working on a game at the moment (written in assembly) but I am really needing to write out a debug trace of what is going on with the p…
... Plus does preset IY to $5c3a. It also ... presets the Interrupt State to IM1 (DI).
< ... the snapshot doesn't return to BASIC (it crashes).
screen.
[code]< ... /> I'm going to try to copy and paste in a default ... -
Why are multicolour engines only able to be made now?Now I'm no programmer, but, how come multicolour engines are only being created/designed now? I know there were Rainbow Graphics used in games in the…
... from the bottom to the top of the screen.
The ... colour routine has to synch itself to each line to ... (e.g. you might want to copy one entire set of attributes ... top 2/3 of the screen, so only using ( 64 + 128 ... -
A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... loader takes care of bank switching for 128k programs so ... specifying the address to load to and the length ... hl,table ; hl points to our loading list
... the index is now pointing to the next block
dw 32614 ; load to address
dw 15678 ; ... -
quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... simple demo which divides the screen into three coloured segments, ... to high memory, then copies the segments back to the screen ... randomly, using LET to copy between the ... /> [*]Line 4 just colours the screen.
[*]Lines 5 & ... -
quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... 1) to 60000 (back buffer). 160 bytes.
3- Make screen data ... a$. Just for-next to read 160 bytes ... 2 to 3)... It takes 8 seconds for a full screen.
to adapt for me to "copy" the original 160 ... -
From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... v$() to the top of the screen with the ... LET in line 17. This takes 25856T according to ... bit patterns are needed to copy to the display file. ... the CHR$ being converted to bit patterns? Maybe ... should draw a diagram to demonstrate what's happening ... -
From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... comprensive and easy way to made the screen text variable... ;-)
to mine...
The ... code with "turbo copy ram"... I hate to pause screen for a good ... address for [B]change video screen value[/B] or LET v ... -
Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
... polomint's code to make it easier to understand (probably ... that will print a screen of 2x2 tiles. It ... file - don't try to copy it somewhere in the middle ... ; start at top left of screen
check_tile:
to print
... -
TXT2EMU enhancementI was looking at the encodings supported by BAS2TAP for entering graphics, print controls, etc. as plain text. Basically, there's only one needed, be…
I made a few changes to the 128 syntax error handling - ... just to use (ERR_SP) for redirecting into ... give the option to correct them. The code to copy bad lines into ... the screen.
A little more work is needed to handle ... -
Learning Machine Code the +2a wayHello again all, I thought I'd ask in this forum as the other categories seem less relevant. I keep re-reading the thread below with the advice given…
... accessing the 128k memory through bank switching, the ramdrive, they are different ... is that those specialised subjects, to get them done well you ... 100% of the z80 time to just send data correctly, ... It said: "nothing about writing to the MIDI and the Serial ... -
Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
... ' your startcoordinates to the left upper corner of the screen and not ... /DRAW I used is to copy the LINE command to ROM and alter ... game used the DRAW routine to calculate the direction the ball ... (pixel) was shown on the screen. -
ZX Alien Breed - WIPI'm sure a lot of you have seen the discussion in the New Game Ideas area about a Speccy version of the classic Amiga game Alien Breed. I've been dro…
impressive progress,
are you using the stack to copy bytes from the backbuffer to the screen?
do you blank the back buffer every frame then draw sprites on to it? -
New IF2 Cartridge: Manic MinerI want to release some IF2 cartridges for ZX-Uno. This is the first one. [url]http://zonadepruebas.com/download/file.php?id=2668[/url] I am not gra…
... [/I] be possible to get it to run entirely from ROM ... it uses for repainting the screen (9K) ? Andy Noble's ... and restores small regions of screen content before and after drawing ... great big LDIR to copy the secondary graphics buffer to the screen.
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... screen order? Good move.
Might be quicker to ... a much quicker way to copy data. You use the ... (in reverse order) to get the data out ... EX AF',AF' to swap to the alternate register set ... than your main screen, allowing you to draw sprites and ...Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
[QUOTE=joefish;765476]So, your screen buffer is in linear order ... instead of Spectrum screen order? Good move.
to copy data. You use the Stack ...bytes bits balonyNever mind
... hand corner of
the screen to the bottom right-hand corner ... know the idea - you copy graphics to some area of memory ( ... you use some fast code to copy it to screen.
As ... different organization than real screen, you just have to take it into ...ScrollsHello. Ive been working in scroll routines and I want to show you them. First, one vertical 2 pixels scroll routine with 13 sprites [youtube]D-T3…
... if the screen isn't passing by fast enough to make a ... /> (b) Completely re-draw the screen area from the map each ... you can re-draw the screen for any point on ... b). I redraw all the screen but I dont use pre ... it (and I dont want to copy it (from Cobra for example ...LOADing 128k's worth of data???Just getting to grips with the concept of the 128's 'bank switching' set up, but how can you load the stuff into memory from tape (or TAP file)? Do…
... getting to grips with the concept of the 128's 'bank switching' set ... place them in a memory bank with a routine?[/QUOTE]
bank is paged in so you ... can switch in each bank in turn and call LOAD_BYTES ...Unusual custom turbo loaders - with sourcesI have always been fascinated by turbo loaders; my games all feature a TZX version with one of such schemes implemented, and I have been experimentin…
... loader that used the full screen and not just the border ... short BASIC program then switching straight to full screen mode with no leader ... ) - can't get the game to work though :(eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... /> "The switching signal needs to be able to source upto ... pin 16 @ 3V for switching to take place."
[/ ... have the option to switch to RGB on the ... manufacturers support the specification to different levels of accuracy ... IEC933-1). A copy of EN54009-1 can ...New Game: Ninjajar!Yes, it's here! We had some late hour problems with +2A models and had to switch to a machine code loader (as the game takes up the whole 128K, even …
... most people nowadays are used to WASD layouts.
to reduce it somewhat. There' ... /> -ULA is rendering the screen.
I' ... and setting it back to f0 (the correct value ... page other RAM pages to copy stuff, this works. But ...Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?
... 28h calculator call utilizing stack to pass parameters? What's ... something and that was used to initialize the decryption routine. ... interface's "Magic Button" to dump entire memory while the ... the Beta Disk -- the ROM bank switching using address 15616 -- from a ...128K shadow screen?Hi How does the shadow screen feature work , and how can it be used?
[QUOTE=joefish;771159]Somewhat confusingly, but logically, you can also page Bank 5 (the normal screen) in at the top of memory[/QUOTE]
When Bank 5 is paged in at $c000, do writes to $c000 have contention or not?Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... have no idea how to take something made with ... .
To export a picture to basic:
3. type: LOAD "" SCREEN$
That's ... a. If you want to copy image into another tape, use ... /> b. if you want to use multicolour (MLT) images, ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... /> To copy a UDG from a character square on the screen, you need to ... work out the address of the top byte on screen, then copy ... it to the first byte of ... 256 to the screen address and 1 to the UDG address and copy another ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... 256 bytes for each bank of UDGs we want. ... can copy the code out for POKEing another bank of ... when you want to use the first bank, you do:
And to use the other bank, you POKE the high ... bytes unsused between each bank - but to pack everything in ...Tile engine and slight colour flickerOver the past few nights I've been working on a simple tile game engine for a rock fold game I'm making. While all is going surprising well I've not…
... or re-write the copy routine to draw line-by-line with ... /> ld sp,screen_table ; Moves pointer to screen table (visable address of each ... />
; Displays 8 pixel lines to the screen
ld (temp1 ...displaying all memory activity in a screenDunno why I keep thinking about this, but here goes Is it easy enough to add a screen to an emulator that shows every memory address' activity.... …
... of 0xff into the buffer to:
[LIST]
to the achievable emulation speed ... Why are you bothering to intercept reads at all, ... draw 8 pixels on the screen with it?
copy it to the screen.
...displaying all memory activity in a screenDunno why I keep thinking about this, but here goes Is it easy enough to add a screen to an emulator that shows every memory address' activity.... …
... Why are you bothering to intercept reads at all ... draw 8 pixels on the screen with it?
< ... a monochrome bitmap and copy it to the screen.
to the screen once a frame ... with no persistence it's not going to ...
