... way you have a character buffer assigned for each window which ... main screen has to be redrawn and the screen buffer says it belongs to screen 3 ... 7,7 from screen 3's own buffer. Leaving two screen char lines ... biggest size a window's buffer will have is 32x22 ...

... I press Enter and proceed to next screen (game selection menu) both ... br /> L2=buffer[1];
H2=buffer[2];
E2=buffer[3];
C=buffer[13];
B=buffer[14];
IY=(buffer[16] 2 ...
R=buffer[20];
F=buffer[21];
A=buffer[22];

... Something is writing to screen memory to create those little yellow ... us are going to be able to do it for ... a couple of screenshots to go on...[/QUOTE]
screen as temporary buffer when the affected ... what PeterP redraws the screen at the end of ...

... of 0/24 into the buffer to generate a noise.
... near the top of the screen, the border would flash ... at the top of the screen.

I ... wave effect on the title screen. Even then I still ...
There are some huge screen address tables in there that ...

... be bunged in the printer buffer to load the two headerless blocks ... transferred to other media. The first one is just a SCREEN$, the ... .

To transfer the CODE block to another medium, it ... POKE is to stop the LOAD addressing the lower screen.
[ ...

... setup code needed to poke it somewhere:[code ... to mirror from from hl buffer to another buffer (or self-buffer). ... For example, if you wants to ... mirror a complete line on screen ...

... you want to mirror from from hl buffer to another buffer (or self-buffer). For ... example, if you wants to mirror ... a complete line on screen ...

... what circumstances updating the screen line by line bottom ... over from the back buffer it makes no difference ... lower in the screen than the bottom to top draw.
to back buffer algorithms. This applies to algorithms that are drawing sprites directly to screen ...

... )
; last byte of the screen
ld hl, $ + 9 ... (endcall), hl
jp blit ; call blit
ENDM

jp blit
ENDM
ENDM

blit: ; subroutine to blit 16 from location in IX ...

... you can synch it to do all the critical ... at the edges of the screen. But that's only ... s much harder to optimise the code to avoid contention, and you ... end up having to unroll ... a lot of memory) to realise even the smallest ...

... quite big difference when copying to screen. thats where you get real ... LDI can potentially suffer from contention, since all the following ones ... multiple of 8 (lenght of contention cycle). So the main benefit ... copy will be outside of contention time zones.

... SPACE on the define keys screen. I give each of ... start of my font to be 256 bytes lower ... 256+start_address which gets me to where SPACE (as a ... data off the loading screen into what was the ... considering using a black screen as a buffer to decompress data, then ...

... a back-buffer for the middle third of the screen which contained ... correctly, It uses PUSHes to draw the blocks for the ... and unrolled LDIs to transfer the back buffer to the screen behind the raster ... the fresh display. The back buffer is bit-shifted and new ...

... attributes. It's up to the programmer to set what those sprites ... ] writes one byte from a buffer to OUT 254 after every line ... noise or tones into a buffer to play sounds, or a list ... bytes that can be written to the screen on each line.

... a buffer vertically and horizontally using unrolled loops, then dumping it to screen ... though, and there would need to be 8 pre-shifted copies ... of each tile, not to mention the sprites. It's ...

... buffer vertically and horizontally using unrolled loops, then dumping it to screen ... and there would need to be 8 pre-shifted ... of each tile, not to mention the sprites. It ... 's unlikely to work in 48K.[/QUOTE ... bloke in Exile has to do, but whatever the ...

... of start of screen buffer; 192 used to test the 25% ... />
; Map DE to pixel in screen buffer (HL)

LD ... shifted down, add 16384 to point to screen buffer
LD A, ... /> ; Bit positions within screen byte to set
.BYTE 00000001b ...

... a buffer vertically and horizontally using unrolled loops, then dumping it to screen ... though, and there would need to be 8 pre-shifted copies ... of each tile, not to mention the sprites. It's ... unlikely to work in 48K.[/QUOTE]

... AT 0,0 to 16,16 area of screen, 256 bytes I ... ;move a 16 byte row to the buffer
ldi
ldi ... ;move 16 bytes from the buffer to the screen
ldi
ldi ... ,hl ;put hl back to buffer, de back to screem
pop bc ...

... instead of trying to match the Spectrum's screen memory layout.
buffer to the screen, again, based on the ... another buffer, draw the sprites on it, then copy to the screen. ... of copying the scenery to the screen just behind the TV ...

... could always use a backbuffer screen so we wouldn't be ... is the time taken to dump the buffer to the screen. You're probably ... You really don't have to care where the TV scan ... d probably need 3 frames to process and delete/redraw ... if his demo is anything to go by.

... is the time taken to dump the buffer to the screen.[/QUOTE]

screen memory is done with a ... , I'm always striving myself to make my programs work on ...

... pointer to scroll a buffer then another routine to dump the buffer onto the screen ... how you can move the buffer to the screen and then put sprites ... ) transfer a buffer to the screen then mask sprites onto the screen, the question ...

... loops per line of screen I want to skip. You can make ... the buffer to the top of the screen, and goes until the buffer runs ... out. Then a second loop jumps back to the ... top of the buffer and carries on copying until the screen ...

... top of your buffer to the top of the screen - easy.
< ... in your buffer to the top of the screen, the screen appears to have scrolled ... runs out of buffer and still has screen to fill, it just ...
The buffer is always longer than the screen, so on the ...

... copy, loop round it to copy up your screen, then over-write ... HL,SP to move to the next line. The next screen line address ... you're using an intermediate buffer to add sprites.

I ... a similar trick with that screen row address table - either double ...

... too uncomfortable to use the ROM routine to edit multiple ... bottom of screen is a convenient place to input short ... more convenient to use the main screen when editing ... but allows the input buffer to be pre-loaded with ... use it from BASIC to edit blocks of ...

... screen support, not 2/3 only

- exporting each buffer to a ...

... screen support, not 2/3 only

- exporting each buffer to a ...

... ". Its main purpose is to mimic screen contents to output them in RGB ... mode to improve picture quality. This ... -size double buffer to output the picture to a VGA monitor.
- To accomplish ...