... , is backward setting alternating the SP to end of source area and ... PUSH and POP with all registers (including shadow registers too). This uses the ... amount of cycles (And by the way, 2 Bytes are readed ... , but much slower than PUSH/POP is to use a amount of LDI ...

... ** - the entire graphics buffer is stored in this sequence
push hl ... double amount of memory for the screen buffer and special ... was example of very fast push/pop copy routine. he uses it ... i guess.

the second thing to remember is fact that ...

... article, the fastest way to write to screen is to move the SP to the start of ... in memory I think), and POP the values off it.
... br /> LD DE,yy
PUSH DE
...[/code]
... you have to precreate the tables and fill the DE with ...

... writing is possible by pointing the stack to the screen RAM and pushing ... will push the return address on there and corrupt the screen in the process ... l
push de[/code]

In POP-reading case (when ...

... music ; IX points to the start of the music.
next: ... /> subr: PUSH BC ; Start of subroutine. Save the note length.
to the end of the loop.
labl4: ... (work2),A
labl5: POP BC ; Restore BC
...

...

STARLOOP1
PUSH BC
STARLOOP2
CALL ...
CALL PLOTSTAR
POP BC
DJNZ STARLOOP1
LD L,A ; add the x-coordinate to the low byte of hl ... into a

POP HL ; retrieve pointer screen byte ...

...
pop bc
jr LineScrolledUp

ScrollUpLastLineInScreen
push bc ... ; hl now points to the element in the lookup table containing the address
;hl now points to required screen byte
PUSH HL

... br />
STARLOOP1
PUSH BC
STARLOOP2
CALL ... CALL PLOTSTAR ; plot the stars initially
POP BC
DJNZ ... LD L,A ; add the x-coordinate to the low byte of hl ... into a

POP HL ; retrieve pointer screen byte ...

... br />
STARLOOP1
PUSH BC
STARLOOP2
CALL ... CALL PLOTSTAR ; PLOT the star again

POP BC ; restore ... LD L,A ; add the x-coordinate to the low byte of hl ... into a

POP HL ; retrieve pointer screen byte ...

... to exit back to BASIC.

The stars go the opposite way to the ... br />
PUSH BC ; save the counter again
< ... POP BC ; restore counter

CALL MOVEMENT

PUSH ... PLOTSTAR ; PLOT the star again

POP BC ; ...

... the PC though.
The great thing about PASMO is its ability to ... TASM cross assembler to do my work ... doesn't feature the PASMO TAP generation ... the main memory that you are testing). That means, CALL, RET, PUSH, POP ... and IY registers to store return codes ...

... the main memory that you are testing). That means, CALL, RET, PUSH, POP ... a 32-byte area adjacent to the program itself.

... you have developed to avoid use of the stack - my ... program already uses the IX register to address the "pattern table".

...

PUSH AF ; save the character
PUSH DE ; save the co-ordinates ...

; Write the attribute ... Now points to correct screen byte

POP AF ;Restore the character ...

... It's quite common to restore the stack this way ( ... how to use the stack. Remember that PUSH/POP instructions are the fastest ... the stack is to modify the return values. One common case is to push the ... addresses of routines you want to execute ...

... bit reg) point to the first executable byte (ignoring the CALL) of this ... to the screen no matter where it was loaded to (of course, with the ... SP
DEC SP
POP DE
LD HL,PROG ... /> LD BC,END-BEGIN
PUSH DE
LDIR
RET ...

... going to have reset set A to 0 at the start ... move XOR A to the first line of the loop.[/quote]
the entire memory
ld hl ... get found address
push hl
pop bc ; retrieve address< ...

[QUOTE=Baggers;341475]then LDIR'd to the screen :)[/QUOTE]

LDIR? *splutter* On Joffa's thread? GRRRR :x We 'push' and we 'pop'.

... PUSH[/B] and [B]POP[/B]. There's another register on the Z80, the ... 2 to the stack pointer.

So, you can PUSH HL then POP ... you POP too many values, or POP something in the wrong order to ... DE to HL to draw a bit of the sprite, then POP DE to get the ...

... DEC HL
PUSH HL

to the first character of the next string)

POP ... the next char. 0 indicates End of String.
GetNextChar:
PUSH ... br /> ; Sets the cursor back to the first character in

... POP DE
POP BC
POP HL
EXX
POP DE
POP ... PUSH BC
PUSH DE
PUSH AF
[/code]

The above ... (6144 bytes)
The code to copy super fast (8064 ... br />
So the trade off is to use the earlier code and ...

... set the Stack Pointer to the start of the sceen address table and use POP to ... read off the ... . Just remember not to PUSH or POP anything, and to set the stack pointer back ...

... set the Stack Pointer to the start of the sceen address table and use POP to ... read off the ... . Just remember not to PUSH or POP anything, and to set the stack pointer back ...

... invalid?

I said the POP/PUSH method will only work on ... an ordinary +2) because, according to the FAQ that you directed me ... to when I asked about something ... they have different timings compared to the 128K and ordinary +2. And ...

... "LD SP,nn" and all the POP / PUSH instructions for every line of ... aside around 5K for the interrupt routine to do everything in ... but you have "naive" approach to the whole thing (not offense i ... /> then use loooooong push/pop/ld sp code to write in seven lines ...

... )+(128*char_row) ; set the stack pointer to the data
pop af ; scoop up ... /> pop hl
ld sp,22552+(32*char_row) ; set the stack pointer to the ... screen
push hl ; write 8 ...

... it drifts further and further to the right, until it falls into ... /> pop de
pop hl

ld sp,attrline
push hl ...
push de ...
push bc
push af

... /> ei

pop hl ;Filename
push hl
ld bc ...

call DOS_OPEN
pop hl ;Filename address
jr ... back to the 48 BASIC ROM.
;
finish:
push af
ei
pop af
;
; TODO: ...

... and the MF 128 to page in on the leading edge of the instruction ... continue to function regardless), or perhaps it was never changed so the ... worth, on the Multiface 3 (version 3.C) the PUSH / POP have been NOPped ...