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Odyssey Magazine #02
14 июля 1997 |
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Mail - Scrolling to row up and down.
(C) E2 Soft CodeWalker, 1997
E-Mail: e2soft@extranet.ru
Music by Shov
Hello, Dear!
Prodlagayu to your attention a number of protsedurok.
I hope that they will be very useful and applicable to
everyday tasks. The purpose of this publication does not
attempt a At first glance the correct procedure is that when
the need to address this problem coder would not have invent,
though simple, but the bike. The more so for SPECCY need simple
and fast program and the need to save for details.
All these procedures use
alternative registers for speed, so when you use from BASIC
HL alternative to save.
Scrolling on the line up
Uses a table with their work.
RAS EQU 7; just scrolled
; Are 7 lines,
Lest the umklapp
, Describes the emptiness
UPSC LD B, 23, 23 lines
LD HL, TABST
STT1 LD E, (HL); Line 1
INC HL
LD D, (HL)
INC HL
PUSH HL
PUSH DE
LD E, (HL); Line 2
INC HL
LD D, (HL)
PUSH DE
EXX
POP HL
POP DE
LD BC, 32 * RAS; in the line of 32 bytes
LP PUSH HL
PUSH DE
DEFS 32, # ED, # A0
EX AF, AF '
POP DE
INC D
POP HL
INC H
EX AF, AF '
JP PE, LP
EXX
POP HL
DJNZ STT1
RET
Analigichno, scroll down the rows
DWSC LD B, 23
LD HL, TABEN
STT2 LD D, (HL); 1-STRK
DEC HL
LD E, (HL)
DEC HL
PUSH HL
PUSH DE
LD D, (HL); 2-STRK
DEC HL
LD E, (HL)
PUSH DE
EXX
POP HL
POP DE
LD BC, 32 * RAS
LPP PUSH HL
PUSH DE
DEFS 32, # ED, # A0
EX AF, AF '
POP DE
INC D
POP HL
INC H
EX AF, AF '
JP PE, LPP
EXX
POP HL
DJNZ STT2
RET
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