... you really need to copy from buffer to screen, you have about one ... and a half frame to do ... frame).

* Use shadow screen in 128K mode, so you ... only copy from buffer to screen what really needs to be copied.

... the main character to repaint his patch of the screen - I'm ... ] may be trickier to do without the full-screen refresh loops, but ... than 8 moving entities per screen (including player) and every ... slower than just copying image to screen, but using it for player ...

... />
The original program compiled to around 47k which is too ... a buffer before printing it to screen. Now it all fits in ...

... hl),a ; write background color to screen
add hl,bc ; ... (hl),a ; write result back to screen
; inc de ; ... hl),a ; write background color to screen
add hl,bc ; ... (hl),a ; write result back to screen
; inc de ; ...

...
it´s needed to turn the DOS on before ... way for doing this is to call #3C06 = 15366 ... br /> onto the stack to automatically execute DOS off ... Example for doing a CAT to Screen:

CALL ... ,2 ;select stream 2 (screen)
LD C,7 ...

... .tap[/url]. To get to the bug you need to pick 1 for ... which displays the ascii equivalent to screen. This is the part that ... needs the interrupt to run to get the correct ascii ... converts key press to ascii and loads it to a mem location ...

... the player is allowed to flow across the screen if the jumping ... section of Platoon. Its supposed to be a serious game about ... an inhuman leap across the screen, and probably kicks the soldier ... way you could leap from screen to screen was intuitive.

... /> After setting sp to point at the start of ... ; load pixel data from screen
and l ; and ... (de),a ; and back to screen we go
inc ... de ; increment screen ptr

...

... the only real solution is to generate proportional text. But ... Instead the position on screen has to be defined using the ... , indeed uses Graphical Coordinates to place the characters onscreen. ... The alternative to this would be to plot the pattern to screen via an ...

... way of plotting an image to screen, the image is made up ... "] that approach[/url] to get my Characters to screen, though it's obviously ... fairly straightforward stuff for it to perform? My array in that ... pretty much up to the Nested Loops to Decide when to go down ...

... that approach[/url] to get my Characters to screen, though it's ... much up to the Nested Loops to Decide when to go down ... repeated division and remainder calculations to extract individual bytes. For ... You're definitely going have to use machine code/assembly ...

Thanks all. Just basically wondering how you would page a graphics routine to screen from a page bank, any examples much appreciated :) Happy new year :)

... selecting a bank and transferring to screen 7 from buffer/pagebank.

... bank and transferring from screen 5 buffer to screen 7 from main display ...

... bank and transferring from screen 5 buffer to screen 7 from main display ... . I want to store/select the ... certain banks, draw to buffer scrin then flip to normal screen.

... and unpack all the data to screen memory, then copy the sprites ...

... A instead as it seems to be free, for less bytes ... ] INC E ; ADD 256 TO SCREEN ADDRESS TO GET TO NEXT LINE[/code]
For reliably stepping down the screen one line at a time ...

... COUNTER
PUSH DE ; Save screen address

LD BC ... ; DO A LINE OF THE SCREEN, 32 CHARS
POP DE ... /> INC D ; ADD 256 TO SCREEN ADDRESS TO GET TO NEXT LINE
[/code]

... here, only just good enough to solder such a job, but ... you experts could give me to get this going would be ... have 5v and some output to screen after cleaning up regulator. There ... is a white border, black screen with vertical white lines running ...

... the geniuses that brought to you the already reviewed ... i] platform whizzing from screen to screen with each of your ... consisting of a single screen level in random order ... ad nauseam trying to reach a new screen, and you ... don't know exactly what to ...

... of 6144 bytes each to avoid interfering with the ... you don't need to copy it to bank 0. You ... so you would need to copy it again from original ... from any bank to screen, then decompress it from screen to bank 0. ... You would be able to store ...

... so you would need to copy it again from ... data, it may possible to compress 16Kb into 6Kb ... from any bank to screen, then decompress it from screen to bank 0. ... You would be able to store ... are then loaded from time to time into bank 0, ...

... the screen if there's a write to screen memory (from 16384 to 23295 ... you emulate. There's more to it - tapes, contention, multicolour ... later. The best place to start is to get the (C) 1982 ... Sinclair Research Ltd message to display on startup, then add ...

I'm back on [b]Jumping Jack[/b]. I think I'm at my peak at it now, after 30 years. I got to screen 8 for the first time yesterday. Getting the hang of quickly going off one side and then going back again as soon as one of the gaps has passed.

... sprite char on screen, it needs access to the graphics data ... pixel placement on screen the engine has to rotate the sprite ... current sprite char to form the graphic written to screen.

... Here is the code to draw ...

... />
; write 12 bytes to screen (left side)
ld sp ... push af

; calculate screen address at right side

; write 12 bytes to screen (right side)
ld sp ...

... />
; write 12 bytes to screen (left side)
ld sp ... push af

; calculate screen address at right side

; write 12 bytes to screen (right side)
ld sp ...

... is the way to do it. Assuming the active screen area is ... attributes).

Care to explain, the magic number and ... character area.
- Copies buffer to screen memory using set of LDIs ... at ~1/3 of the screen (top to bottom) when scrolling, and ...

... () stands for "pixel x y to screen address" the first param will ... />
zx_saddr2aaddr() stands for "screen address to attribute address".

zx_px2bitmask ... a bitmask corresponding to the pixel within a screen byte.