search

Commodore 1541-II Betriebsanweisung Seite 44

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 55
  • Inhaltsverzeichnis
  • LESEZEICHEN
    • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 43
ALTERNATE FORMATS:
PRINT#l5,"B-E:";channel
#;drive
#;track
#;sector#
PRINT#l5,"B-E:channel
#,drive
#,track
#,sector#"
EXAMPLES:
Assuming you've written a machine language program onto Track
1,
Sector 8
of
a
diskette, and would like to run it
in
buffer number I in disk memory (starting at $0400
hexadecimal, you could do so
as
follows:
110 OPEN 15,8,
15
Open command channel
120 OPEN
2,8,2,
"#I
" Open direct access channel to buffer 1
Load Track I, Sector 8 in
it
& execu
te
Tidy up after
130
PRINT#l5,
"
B-E"
;2;0;1;8
140CLOSE
2
150CLOSE
15
160END
USER COMMANDS
Most User commands are intended to be used as machine language JMP or Ba
sic
SYS commands to machine language programs that reside inside the disk memory.
However, some
of
them have other uses as well. The User! and User2 commands are used
to replace the Block-Read and Block-Write commands,
UI
re-starts the
1541
without
changing its variables,
UJ
cold-starts the
1541
almost
as
if it had been turned off and
on
again, and UI- speeds up the
1541
when used with the VIC 20 only. (Note: VIC 20 owne
rs
don't have to use UI-; the
1541
works with the VIC 20, with or without this command
.)
User
Command
UI or UA
U2
or
UB
U3
or UC
U4or
UD
US
or UE
U6
orUF
U7
orUG
US
or UH
U9 or
UI
U:
or
UJ
UI+
UI-
replaces Block-Read
replaces Block-Write
Function
JMP $0500 (same as SYS 5*256, but within the
1541
itself.)
JMP
$0503 (SYS 5*256 +
3)
JMP $0500 ( " 5*256 + 6)
JMP
$0509 ( " 5*256 + 9)
JMP $050C
("
5*256+
12)
JMP $050F ( " 5*256 +
15)
1541
NMI (non-maskable
interrupt-warm
start)
1541
reset (cold start, allow 2 seconds before next command.)
restore
1541
to usual speed
speed
1541
up by 25% when used with VIC 20 only.
I
By loading these memory locations with another m!ichine language JMP command,
such as JMP
$0520, you can create longer routines that operate
in
the disk's memo
ry
along with an easy-to-use
jump
table.
78
fORMA
T FOR USER COMMANDS:
PRINT#l5,
' 'Ucharacter"
where
"character"
defines one
of
the preset user commands listed above.
EXAMPLES:
PRINT#l5
,
"U
:"
PRINT#l5
,
"U3"
79
Preferred form
of
DOS RESET command
Execute program at start
of
buffer 2
Seitenansicht 43
1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 54 55

Kommentare zu diesen Handbüchern

Keine Kommentare
  • Auerswald Airaid Aquaport CUSHCRAFT Windsor
  • JBL DVD Spieler Garmin Kabellose Kombibohrer Sony Video-Splitter Fujitsu Multifunktionsgeräte American Audio Nein
  • LG 42PT350 Dwyer WDG Sony MEX-BT4700U Sony VPCM13M1E Zanussi ZEI3921IBA
  • Sony STR-DN1060 Bedienungsanleitung Electrolux EW23BC87SS Bedienerhandbuch Casio PX-130 Handbuch Antari Fazer Z-300 Bedienungsanleitung Electrolux ESL63010 Bedienungsanleitung