... that concept of an off-screen buffer being generated and swapped, so ... only a single sprite per screen frame. That would mean ... games will hardware scroll the screen and move sprites with the ... as simple. Game logic and screen updates are inextricably linked and ...

... /> [code]
PUSH AF
PUSH BC
PUSH DE
PUSH HL
EX ... /> PUSH AF
PUSH BC
PUSH DE
PUSH HL
PUSH IX
PUSH IY ...
PUSH SP ...

... tried this
[code]
PUSH BC
LD B,100
CALL 8927
POP BC
RET
[/code]
PUSH and POPs ? :)

... hl,$4000 ;start of screen file
ld bc,$18 ;0 into ... B; 8 pixel rows x 3 screen thirds ... ld (hl),a ;pattern into screen address
inc hl ;next ... screen address
djnz loop ;repeat ...

... HASH LD HL,MainScreen ; screen address
LD B, ... ; put back to the screen
INC HL ; ... ;start of screen file
ld bc,$18 ;0 ... into B; 8 pixel rows x 3 screen ...

... ,0
LOOP:
push af
push bc
call 8927
pop bc
inc b

... Store HL registers
push bc ; Store BC registers
ld a ... nz,ATTR_ROW_CHAR
pop bc ; Restore BC registers
pop hl ...

... Store HL registers
push bc ; Store BC registers
ld a ... nz,ATTR_ROW_CHAR
pop bc ; Restore BC registers
pop hl ...

... /> RET

PRINT_MESS:
PUSH HL
LD A,2 ...
CALL PRINT

PUSH BC
LD B,10 ; 0 ...
DJNZ DELAY
POP BC
RET

PRINT ...

... 32

add hl,bc ;Add to attribute address
BC

add hl,bc ;Add to ... You might want to PUSH BC and PUSH HL at the start ... g. POP IX) then PUSH the numbers you want to ... onto the stack, then PUSH IX to put the ...

... L_FA3F: PUSH BC ; FA3F C5
PUSH DE ; ... /> L_FAF5: PUSH BC ; FAF5 C5
PUSH DE ; DE ... counter
L_FB56: PUSH BC ; loop shifts attribute rows ...

... loop counter
L_FB56: PUSH BC ; loop shifts attribute rows 8 ...
L_FAF5: PUSH BC ; >1 BC=counters
PUSH DE ; > ... CA 05 FB
PUSH BC ; >3 FAFD C5 ...

... same time with an LD BC,(nnnn) instruction. Just remember the ... then Y, when you LD BC,(nnnn) then X ends up ... back in A. I could PUSH BC at the start and POP ... BC at the end so that ...

It might be easier in cases like that to render to a slightly larger off screen buffer and then do the flipping as a separate step. It may also help with scrolling text, since you potentially can skip over re-rendering all the text each time.

... to a slightly larger off screen buffer and then do the [b ...

... LD HL, 23705
PUSH BC
PUSH HL
CALL 7828 ... PUSH HL
PUSH AF
LD E, 8
PUSH BC
PUSH BC ...
RL D
JR NC, 30149
PUSH ... /> PUSH BC
LD L, (IY+94)
PUSH BC
PUSH HL ...

... br /> lc490: push hl
push de
push bc
push ix
... ; copy destination
ld bc,#0005 ; copy 5 bytes
pop bc
pop de
pop ... ?
call lc4db
push hl
ld hl,lc4d8 ...

... -column mode as a single screen rather than two halves. You ... get 255 pixels from one screen buffer and 145 from the other ...

... ;
DRAWBRESLINE LD (DBLSTART),BC
LD (DBLEND),DE
DBLDLP1 PUSH BC
LD BC,(DBLXVAR)
CALL ... y + yinc2
DBLDEND POP BC
DJNZ DBLDLP1
... br /> DBLPLOTSUB LD (COORDS),BC ; Based on ROM routine at ...

... copy up my 2/3 screen buffer, plus more time to erase ... the old buffer. So this is running pretty ...

... it to use a columnular screen buffer.
[b]Lethargeek[/b] - the ... screen clear followed by the copy ... for the bottom of the screen - now to do the other ...

... />
shuffle_sprite:
push bc
ld a, (ix+2 ... br /> ld b, h ; BC = sprite length
ld ... inc hl
dec bc
ld a, c ... add ix, de
pop bc
djnz shuffle_sprite
...

... cell

line_mirror_loop:
push bc

ld hl, ( ... de ; DE = sprite address
push hl

ld a ...
pop de
pop bc
djnz line_mirror_loop

... bc,($5C3D)
push bc ; save original ERR_SP
ld bc,return
push bc
exitgoto:
pop bc
ld ($5C3D),bc ; restore orginal ERR_SP

... bc,($5C3D)
push bc ; save original ERR_SP
ld bc,return
push bc
exitgoto:
pop bc
ld ($5C3D),bc ; restore orginal ERR_SP

... games render to an off-screen buffer, but the 48K version has ...

... to draw to an off-screen buffer and copy the whole thing ... to redraw the entire game screen between passes of the TV ...