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Revision: 1.2
Committed: 2010-04-25T11:52:11Z (12 years, 7 months ago) by cebix
Content type: text/html
Branch: MAIN
Changes since 1.1: +121 -110 lines
Log Message:
documentation update

File Contents

# Content
1 <HTML>
2 <HEAD>
3 <TITLE>Settings</TITLE>
4 </HEAD>
5 <BODY>
7 <H1>Settings</H1>
9 <HR>
11 Under Unix, the settings window appears directly after starting Frodo, or by
12 pressing F10. Under BeOS, the settings window can be brought up by selecting
13 the "Settings..." menu item in the running emulation.<P>
15 <H2>Drives</H2>
17 In the box <B>"Drive Paths"</B>, there are four fields, each corresponding
18 to one of four emulated 1541 drives with the drive numbers 8, 9, 10 and 11
19 (normally you only need drive 8). For every drive, there is a <EM>path entry
20 field</EM> and a <EM>button</EM>.<P>
22 Frodo offers three different modes for drive emulation (see <A
23 HREF="files.html">here</A> for details):<P>
25 <UL>
26 <LI><EM>Directory Mode</EM>, where the contents of a directory of the host
27 file system are made available to the emulated C64 as a "pseudo disk".
28 <LI><EM>Disk Image Mode</EM> uses a binary dump of a 1541 floppy disk in the
29 .d64 or x64 disk image format for providing true, sector-by-sector floppy
30 emulation. This is the preferred mode with the highest compatibility.
31 <LI><EM>Tape/Archive Mode</EM> makes the contents of a .t64 tape image file,
32 a LYNX archive file, or a single .p00 program file available to the emulated
33 C64 as a "pseudo disk".
34 </UL>
36 The <B>path entry field</B> holds either the path name of a directory,
37 the path name of a .d64/x64 image file, or the path name of the .t64/LYNX
38 archive file. Under BeOS, you may also drop Tracker icons to the entry field.
39 The drive emulation mode is selected automatically depending on the type of
40 the selected file or directory.<P>
42 The button labeled <B>"Browse..."</B> opens a file selection dialog for a
43 more comfortable selection of directories and .d64/x64/.t64/LYNX files.<P>
45 If <B>"Enable Full 1541 Emulation"</B> is turned on, the four emulated 1541s
46 are disabled and replaced by a single 1541 emulation (drive 8) that only
47 operates on .d64/x64 files, but emulates the entire 1541 hardware and is
48 compatible with most fast loaders and some forms of copy protection.
49 However, it has considerably slower disk access and can also slow down the
50 emulation. If you have a .d64 with a program that doesn't load with the
51 normal emulation (see above), you may have better luck with the full 1541
52 processor emulation instead.<P>
54 With <B>"Map '/' &lt;-&gt; '\' in file names"</B> you control whether the
55 '/' in C64 filenames will be translated to '\' and vice versa for Directory
56 Mode drives. The '/' character is used to access subdirectories under
57 Unix/BeOS, but as the C64 doesn't have subdirectories, it's a valid part of
58 a C64 file name. This is a problem if a program wants to create a file with
59 '/' in it as the host system would interpret the part before the '/' as a
60 directory name and, finding no such directory, would return an error and
61 the operation would fail. If you activate this checkbox all '/'s will
62 transparently be translated into '\', so in directory listings the '/' will
63 still appear. If you turn off this option, you can of course use the '/' to
64 access files in subdirectories from the C64.<P>
66 <H2>Video/Sound</H2>
68 With <B>"Display Type"</B> you can choose whether the emulation runs in a
69 window or in full-screen mode.<P>
71 <B>"Doublescan Lines"</B> is only available under BeOS for the "Screen"
72 display type. It removes the black lines between scanlines, but makes
73 the emulation a bit slower.<P>
75 With <B>"Display Sprites"</B>, you can switch the display of sprites on and
76 off.<P>
78 <B>"Detect Sprite Collisions"</B> determines whether collisions between
79 sprites and between sprites and graphics should be detected. Turning off
80 collisions will make you invincible in some games (sadly, your enemies are
81 likely to become invincible, too <TT>:-/</TT>).<P>
83 The <B>"Sound Emulation"</B> selection controls the type of sound output.
84 <EM>"None"</EM> means no sound (faster), <EM>"Software"</EM> turns on the
85 software 6581 SID emulation. Under Linux, there is another option,
86 <EM>"Catweasel"</EM> for using a hardware SID chip on a Catweasel board (you
87 also need Catweasel kernel drivers for this).<P>
89 The <B>"Enable SID Filters"</B> field enables the software emulation of the
90 SID sound filters. Some C64 music may sound better with the filters
91 disabled.<P>
93 <H2>Input</H2>
95 <B>"Joystick Port 1/2"</B> specifies which joysticks you want to use for
96 each of the two C64 joystick ports (there is also a
97 <A HREF="keyboard.html">joystick emulation</A> on the numerical keypad).
98 You should only turn on the ports to which you have actual joysticks
99 connected, or the C64 keyboard will behave erratically. Frodo has an automatic
100 joystick calibration. If you plug in a new joystick or change the joystick
101 settings, you should first move the joystick once in each direction.<P>
103 With <B>"Swap joysticks"</B> you can swap the assignment of the joystick
104 ports of the host machine to the C64 ports without having to plug out and
105 in your joysticks. E.g. if a C64 game is using a joystick on C64 port 1 you
106 can simply activate "Swap joysticks" and use a joystick in port 2 on your
107 machine to play the game.<P>
109 <H2>Options</H2>
111 With <B>"Draw every n-th frame"</B> you can select if Frodo should skip
112 frames when displaying the C64 graphics. The normal setting is "1", that is,
113 every frame (every simulated raster beam sweep) is recalculated. If you
114 change this to "2", for example, then only every second frame is calculated,
115 immensely speeding up the display on slow machines, though some raster
116 effects may look a bit jerky. This setting can also be changed while the
117 emulation is running with the '+' and '-' keys on the numerical keypad.<P>
119 When the field <B>"Limit speed"</B> is active, the emulation is slowed down
120 when its relative speed exceeds 100%. If you set the value in "Every (n)th
121 frame" so that the speed is just over 100% and activate the speed limiter,
122 the emulation always runs at the original C64 speed, with the highest
123 possible precision. This setting can be toggled with the '*' key on the
124 numerical keypad.<P>
126 With the setting <B>"Fast Reset"</B> you can disable the memory test that
127 is normally performed by the C64 on a reset, and which takes about three
128 seconds. Under emulation, the memory test is not necessary and resetting the
129 C64 (F12) gets much faster when it is disabled.<P>
131 <B>"REU size"</B> sets the size of the REU (RAM Expansion Unit) emulated by
132 Frodo or turns the REU emulation off ("None"). Very few programs actually
133 use the REU (operating systems like ACE and GEOS, and some utilities), so
134 you can usually leave this at the <EM>"None"</EM> setting.<P>
136 <H2>Advanced</H2>
138 The settings in this group are not available in Frodo SC.<P>
140 <B>"Cycles per line (CPU)"</B> and <B>"Cycles per Bad Line (CPU)"</B> set
141 the number of clock cycles available to the CPU per normal raster line and
142 per Bad Line. If a program is showing flickering lines or graphical flaws
143 you should try to slightly alter both values. For "Bruce Lee" you must
144 enter "62" for the "Cycles per line (CPU)".<P>
146 With <B>"Cycles per line (CIA)"</B> you can control the speed of the CIA
147 timers. Entering a higher value increases the frequency of cursor blinking
148 and key repeat. Some programs don't run correcly with the default value
149 (e.g. "Ballblazer" which needs a value of 65).<P>
151 <B>"Cycles per line (1541)"</B> sets the number of cycles available to the
152 1541 processor emulation per raster line. There is normally no need to
153 change this value. This setting has no effect if 1541 processor emulation
154 is turned off.<P>
156 The settings for the four "cycles" coming closest to an original PAL C64
157 are (63, 23, 63, 64).<P>
159 The setting <B>"Clear CIA ICR on write"</B> is necessary to make some
160 programs (such as the games "Gyruss" and "Motos") run that would otherwise
161 hang in an endless interrupt loop because they use an unusual technique to
162 acknowledge CIA interrupts (sometimes even without the programmer knowing
163 it). It should normally be turned off.<P>
165 <H2>Unix/BeOS/AmigaOS</H2>
167 Clicking <B>"Start"/"OK"</B> will start the actual emulation (or return
168 to it) and <B>"Quit"/"Cancel"</b> will discard your changes to the settings
169 and quit Frodo (or discard the changes and return to the emulation).<P>
171 <H2>BeOS/AmigaOS</H2>
173 With the menu items <B>"Open..."</B>, <B>"Save"</B>, <B>"Save As..."</B>
174 and <B>"Revert"</B> you can load and save the settings from and to
175 arbitrary files.<P>
177 </BODY>
178 </HTML>