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Deja Vu #09
13 ноября 1999 |
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Coding - fast print 2x2 sprite familiarity, up to familiarity.
(C) Death MoroZ
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Hello everyone who is pro chunky-bump'y, and I
fast printing of 2x2 sprite familiarity,
which is designed for fixed position of the sprite, for
example, it can be printed maps.
Thus, the following procedure, you must call before starting
the main program.
Procedure CREAT several changes the format of sprites,
namely: leaving unchanged the first 2 familiarity, with the
second following occurs:
before the call: after:
16 17 30 31
18 19 28 29
20 21 26 27
.. .. .. ..
What is it? And here is why: For example, in HL we have
given the address of the screen, which is printed, to print the
first 2 familiarity is no problem, but with less loss pass to
the second pair? For example, You can save up to change the
address: LD A, H, and then restore: LD H, A, you can use the
stack, setting it on a table of addresses, but there is a
better way. To go the following familiarity simply do
INC H, and then continue to show lower
up, for this purpose and is intended
The following procedure.
CREAT LD HL, address sprites 16
LD DE, address sprites 30
DCR LD B, the number of sprites
M1_ PUSH BC, HL, DE
LD B, 4
M2_ LD A, (HL)
EX AF, AF '
LD A, (DE)
LD (HL), A
EX AF, AF '
LD (DE), A
INC HL
INC DE
LD A, (HL)
EX AF, AF '
LD A, (DE)
LD (HL), A
EX AF, AF '
LD (DE), A
INC HL
DEC DE
DEC DE
DEC DE
DJNZ M2_
POP DE
EX DE, HL
LD BC, 32
ADD HL, BC
EX DE, HL
POP HL
ADD HL, BC
POP BC
DJNZ M1_
RET
Example of procedure output:
LD (SP_ +1), SP
LD IX, OUTS
LD DE, ADDRESS MAP
EXX
LD BC, # 6000; ADDRESS BUFFER
EXX; SCREEN
LD IX, OUTS
LD B, NUMBER sprite Y
LOOP LD HL, $ +3
! ASSM NUMBER sprite X
JP (IX)
! CONT
; YOUR PROCESS OF TRANSITION TO SLED.GORIZON; PORARY LINES AND
TRANSITION TO SNA SLED.PARE; COMEST SCREEN
DJNZ LOOP
SP_ LD SP, 0
RET
OUTS LD A, (DE)
EXX
ADD A, A
LD L, A
LD H, SPR_TBL '&H; High Byte
; Pre-arranged address table
, (To create a Static ANIMATION Dost, EXACT CHANGE ONLY HIS
SNACHENIE)
LD SP, HL
POP HL
LD SP, HL; took the address Sprite
LD H, B
LD L, C; in HL-ADDRESS TO PRINT
;
! ASSM 3
POP DE
LD (HL), E
INC L
LD (HL), D
INC H
POP DE
LD (HL), D
DEC L
LD (HL), E
INC H
! CONT
POP DE
LD (HL), E
INC L
LD (HL), D
INC H
POP DE
LD (HL), D
DEC L
LD (HL), E; print the top
One half
LD A, # 20
ADD A, L
LD L, A; PERSHLI TO BOTTOM
! ASSM 3; PRINT NIH ...
POP DE
LD (HL), E
INC L
LD (HL), D
DEC H
POP DE
LD (HL), D
DEC L
LD (HL), E
DEC H
! CONT
POP DE
LD (HL), E
INC L
LD (HL), D
DEC H
POP DE
LD (HL), D
DEC L
LD (HL), E
INC C; REQUIRED
INC C; ADJUSTMENTS ...
EXX
INC E
INC HL
INC HL
JP (HL); OUTPUT
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