... screen. However, I need the ASCII BASIC listing in a buffer ... printer buffer is a bitmap buffer, not a character buffer. It ... INC HL ; Point to next buffer location
LD (bufindex ... ),A ; Store new buffer pointer
AND A ; ...

... actually including a frame buffer for the screen like the VCS does ...

... actually including a frame buffer for the screen like the VCS does ...

... and being able to double buffer (and 48K programmers have lived ... C64 is moving a larger screen area (40 bytes across compared ... that for a second display buffer. The difference between the C64 ...

... there is less calculation, but buffer size to be cleared/moved ... of those cells on the screen yes. Bitmap data takes 8 ... a fifth of the C64 screen idle.

... filling and refreshing the entire screen space above the status ... silly transfer from memory buffer to screen must be done by ... C64 like scrolling with the screen or moving with sprites ... pre-rotate graphics, store multiple screen buffers and use whatever CPU ...

... ]
You still load the SCREEN$ header could be removed.
buffer which was where the code ...

... ]
You still load the SCREEN$ header could be removed.
buffer which was where the code ...

... 2) Software assumes the printer buffer is available for code. In ... ULA as it displays the screen. Some games (Arkanoid is ... It also has slightly different screen timings. Some games that ... Compare LOAD !"quick" SCREEN$ with LOAD "m:quick" SCREEN$. This will only ...

... ), using a larger audio buffer, running in Screen mode instead of Window ... try ZXAM-AGA in custom screen mode. 48K-only and wont ...

... />
Yes, the 2nd screen (Screen 1) is in Bank 7 ... course be overwritting the first screen and sysvars etc.
... that you can LOAD SCREEN$ + a 2nd attribute buffer and load both ... different colours througout your loading screen without the overhead of ...

... must consider writing to the screen, printer, RS423 and file devices ... "write char, read char, write buffer, read buffer, seek to position, etc ...

...

; Clear the screen
LDA #147
JSR ... TAY

; Is screen at new position empty?
GAMEOVER
; clear keyboard buffer
LDA #0
STA ... ; draw the commode on the screen
LDA #28
...

... theory is essentially a dirty-buffer, you can use that in ... cell which covers the entire screen, down to a list for ... each character on the screen - 768 entries each with up ...

... box (into a
small buffer the size of the box ... used a 256 byte
buffer) in order from the back ... area from the small buffer to the screen.
---------
The list ...

...

; Clear the screen
LDA #147
JSR ... />
; Adjust lsb of screen pointers
LDA #242
; Adjust lsb of screen pointers
LDA #21

; clear keyboard buffer
LDA #0
STA ...

... [quote]Does basic page the screen in/out when it needs ... the moment. Currently the screen is permanently paged in at ... normal location, uses the printer buffer to store additional system variables ... disc (which would overwrite the screen). The 128 editor ROM ...

... routines) to move it from buffer to videoram. You would need ... per x movement and one buffer for 8 pixels movement. Buffers ... />
LD A,32 (max. screen width)
SUB width

... be printed fully on the screen, common problem for catalogue system ... string, ldi the text from buffer to screen, scroll up one string ...

... be printed fully on the screen, common problem for catalogue system ... string, ldi the text from buffer to screen, scroll up one string ... recommend to print all into buffer and LDI only visible area ... fact start pointer into your buffer. I think for system prog ...

I wish to have a smooth visible scroll :) With HALT after each pixel string scroll. Like in demo scrolls. That's look nice. So printing in buffer and then moving it cannot be used. I need real screen scroll.

... buffer and then moving it cannot be used. I need real screen ... from buffer
2) scroll screen and get new pixels from buffer.
ld a,(buffer) ; this is left border, ==> ... out
rrca
ld (buffer),a ; get CY out

... add or sub "buffer width" to current buffer start and then move ... the buffer to vram. That ... corrections for the third of screen?

BTW, I can ...

... starts on in the frame buffer is done by means of ... in the frame buffer.

For the screen line I'm ...

... ! That's assuming my buffer unload routines are fast enough ... it may require a special buffer unloading routine, the general purpose ... straight to the frame buffer, a special buffer unloading routine for ... s just a sequence of SCREEN$ images one after another ...

... the 128's second screen as a back-buffer, so the pixel ... audio data as possible between screen writes, to fill up whatever ... there's less happening on screen). This might make the encoder ...

... because it uses a circular buffer which adds some calculation overhead ... how to unload the buffer, and a screen is probably going to ...

... . Sprites. Up to 32 per screen, but only 4 per scanline ... the screen. Instead they've got to be written to a buffer ... on fast writes to the screen memory for things like smooth ...

... on interrupt and rendering current buffer every frame. but line/circle ... four frames to update invisible screen and still have multicolor on ... half of screen. but thats theory.
AOWEN ... bit boring against ARDA's screen :)

... graphics to the screen you write them to a buffer and then ... copy the buffer to the screen when it ... and positions of objects on screen, or bite the bullet and ...