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8-bit computer is, or have questions about how these machines are used,
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how the file formats work or anything else that is not strictly
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related to VICE, you should read the appropriate FAQs <EM>first</EM>, as
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that kind of information is not available here. See section <A HREF="vice_18.html#SEC233">18 Contact information</A>. for
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that kind of information is not available here. See section <A HREF="vice_18.html#SEC363">18 Contact information</A>. for
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information about how to retrieve the FAQs.
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including synchronisation, ring modulation and filters. There are three
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emulators of the SID chip available: first is the "standard" VICE
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emulator, available since VICE 0.12; the second is Dag Lem's reSID
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engine and the third one is reSID-fp. The reSID engines are a lot more
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accurate than the standard engine, but they are also a lot slower, and
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engine and the third one is reSID-fp. The reSID engines are a lot more
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accurate than the standard engine, but they are also a lot slower, and
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only suitable for faster machines.
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The C128 emulator, called <SAMP>`x128'</SAMP>, features a complete emulation of
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the internal MMU (<EM>Memory Management Unit</EM>), 80 column VDC screen, fast
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IEC bus emulation, 2 MHz mode, Z80 emulation plus all the features of the
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IEC bus emulation, 2 MHz mode, Z80 emulation plus all the features of the
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The VIC20 emulates all the internal hardware, including the VIA chips.
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The VIC-I video chip is fully emulated except NTSC interlace mode, so most
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The VIC-I video chip is fully emulated except NTSC interlace mode, so most
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graphical effects will work correctly.
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Sound support is implemented, but is still at an experimental stage. If
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you think it could be improved and know how to do so, feel
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free to contact us (see section <A HREF="vice_18.html#SEC233">18 Contact information</A>).
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free to contact us (see section <A HREF="vice_18.html#SEC363">18 Contact information</A>).
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The VIC20 emulator now allows the use of the VIC1112 IEEE488
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The VIC20 emulator now allows the use of the VIC1112 IEEE488
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interface. You have to enable the hardware (by menu, resource, or
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commandline option) and then load the IEEE488 ROM (see for
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commandline option) and then load the IEEE488 ROM (see for
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example <CODE>http://www.funet.fi/pub/cbm/schematics/cartridges/vic20/ieee-488/325329-04.bin</CODE>, but you have to double the size to 4k for now).
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The IEEE-488 code is then started by <CODE>SYS45065</CODE>.
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The SuperPET also is a PET 8032 with an expansion board. It can map 4k
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at a time out of 64k into the <CODE>$9***</CODE> area. Also it has an ACIA
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6551 for RS232 communication. The 6809 that is built into the SuperPET
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is not emulated, though.
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6551 for RS232 communication. The 6809 CPU that is built into the
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SuperPET is now emulated, since release 2.4, including the 6702 dongle
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The Super-OS/9 MMU expansion, developed by TPUG (Toronto PET Users
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Group) is also emulated.
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To select which model to run, specify it on the
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command line with the <CODE>-model MODEL</CODE> option, where
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<CODE>MODEL</CODE> can be one of a list of PET model numbers, all
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described in see section <A HREF="vice_7.html#SEC154">7.6.1 Changing PET model settings</A>
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described in see section <A HREF="vice_7.html#SEC173">7.6.1 Changing PET model settings</A>
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1-4. All available banks are used for BASIC, where program code is separated
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from all variables, resp. from normal variables, strings and arrays that
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are distributed over other banks. The C510 instead has RAM in banks 0 and 1,
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and uses bank 1 for program and all variables. Bank 0, though, can be
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and uses bank 1 for program and all variables. Bank 0, though, can be
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accessed by the VIC-II to display graphics.
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All the emulators support up to 4 external disk drives as
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devices 8, 9, 10 and 11. Each of these devices can emulate virtual
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Commodore 1541, 1541-II, 1571, 1581, 2031, 2040, 3040, 4040, 1001, 8050 and
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Commodore 1541, 1541-II, 1571, 1581, 2031, 2040, 3040, 4040, 1001, 8050 and
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8250 drives in one of four ways:
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The IEEE488 disk drives 3040, 4040, 8050 and 8250 are Dual Drive
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Floppy Disks. This means that these drives handle two disks. To
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Accomplish the emulation, only one disk can be emulated, namely unit
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#8. The attached image, track display and LED display of unit #9 are
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used for the second drive of the dual disk drives. On unix the unit
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number display (8 or 9) in the emulation window changes to the drive
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number display (0 or 1).
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The IEEE488 disk drives 2040, 3040, 4040, 8050 and 8250 are Dual Drive
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Floppy Disks. This means that these drives handle two disks. To
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accomplish the emulation, only two disks can be emulated, namely units
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#8 and #10. The attached image, track display and LED display of unit
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#9 and #11 are used for the second drive of the dual disk drives. On
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unix the unit number display (8 or 9, 10 or 11) in the emulation
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window changes to the drive number display (0 or 1).
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The Commodore 3040, 4040, 1001, 8050 and 8250 disk drives are
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The Commodore 2040, 3040, 4040, 1001, 8050 and 8250 disk drives are
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so-called "old-style" disk drives. Their architecture includes not
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one, but two processors of the 6502 type, namely a 6502 for the file
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handling and communication with the PET (IP), and a 6504 (which is a
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<CODE>T64</CODE> tape image files (read-only);
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<CODE>P00</CODE> program files;
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<CODE>D1M</CODE> FD2000/FD4000 DD disk image format
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<CODE>D2M</CODE> FD2000/FD4000 HD disk image format
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<CODE>D4M</CODE> FD4000 ED disk image format
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<CODE>T64</CODE> tape image files (read-only)
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<CODE>P00</CODE> program files
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<CODE>CRT</CODE> C64 cartridge image files
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An utility (<CODE>c1541</CODE>, see section <A HREF="vice_12.html#SEC213">12 c1541</A>) is provided to allow transfers
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An utility (<CODE>c1541</CODE>, see section <A HREF="vice_12.html#SEC254">12 c1541</A>) is provided to allow transfers
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and conversions between these formats.
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<A NAME="IDX3"></A>
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648
Some problems have been reported with the proprietary version of the
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Open Sound System for Linux. With a Crystal sound card, sound output
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was significantly delayed and, apparently, the allocated buffer size was
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was significantly delayed and, apparently, the allocated buffer size was
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completely wrong. This is not a VICE bug, but rather an OSS bug.
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<A NAME="IDX4"></A>
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<A NAME="IDX5"></A>
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If you cannot start VICE because you get errors about shared memory, try
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to run it with the <SAMP>`+mitshm'</SAMP> command-line option (see section <A HREF="vice_6.html#SEC48">6.4.2 Video command-line options</A>). This will completely disable usage of the MITSHM extensions,
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to run it with the <SAMP>`+mitshm'</SAMP> command-line option (see section <A HREF="vice_6.html#SEC51">6.5.3 Video command-line options</A>). This will completely disable usage of the MITSHM extensions,
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that are normally used to speed up the emulation window updates. Of
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course, this will also result in a big loss in speed.
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<H3><A NAME="SEC19" HREF="vice_toc.html#TOC19">2.11.3 Printer problems</A></H3>
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VICE supports the emulation of a printer either on the userport or as
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VICE supports the emulation of a printer either on the userport or as
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IEC device 4. Unfortunately the Commodore IEC routines do not
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send all commands to the IEC bus. For example an <CODE>OPEN 1,4</CODE>
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is not seen on the IEC bus. Also a <CODE>CLOSE 1</CODE> after that
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is not seen. VICE can see from printing that there was an <CODE>OPEN</CODE>,
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but it cannot see when the close was. Also a "finish print job"
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but it cannot see when the close was. Also a "finish print job"
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cannot be seen on the userport device.
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To flush the printer buffer (write to <CODE>print.dump</CODE> or to the
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To flush the printer buffer (write to <CODE>print.dump</CODE> or to the
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printer) now a menu entry can be used. Disabling and re-enabling the printer
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should work as well.
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<H3><A NAME="SEC20" HREF="vice_toc.html#TOC20">2.11.4 PET keyboard problems</A></H3>
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If you find that the German keyboard mapping (plus German charset)
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does not print uppercase umlauts, then you are right.
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If you find that the German keyboard mapping (plus German charset)
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does not print uppercase umlauts, then you are right.
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The umlauts replace the [,\ and ] characters in the charset. The keys
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that make these characters do not have a different entry in the
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that make these characters do not have a different entry in the
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PET editor ROM tables when shifted.
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Thus it is not possible to get the uppercase umlauts in the editor.
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Nevertheless other programs are reported to change the keyboard
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