This will pop up a requester from which you can specify whether the snapshot should also contain the disk and ROM status. A snapshot file can be used to restore the emulator state by selecting the load snapshot menu entry at any time. The memory configuration of the emulator is saved in the snapshot file as well. This configuration is restored when the snapshot is loaded.
A quick snapshot can now be made by pressing the M-F11 key and reloaded by pressing the M-F10 key. A snapshot file consists of several modules of mostly different types. Some of the modules are optional and are only saved if the specific feature is enabled at save-time. If the module is found when restoring the state the optional features are enabled, and disabled otherwise. Currently switching between the two video emulations is not possible at runtime, so only snapshots that fit the current UseVicII resource are accepted.
The modules for the real disk drive emulation are included in the emulator when the emulation is enabled during the writing of the snapshot. This section shows the basic module framework and the contents of the different types of modules.
The single chip modules contain the chip state, not the state of the emulator. We tried to make the format as implementation-independent as possible, to allow reuse of snapshots in later versions of this emulator, or even in other emulators. In this section we use certain abbreviations to define the types of the data saved in the snapshot. The tables for the single modules state the type, name and description of the data saved in the modules. The data is saved in the order it is in the tables, so no offset is given.
Each module has a header with the information given in the table below. This additional data is ignored by older restore routines. This module saves the core state. You will find a clock value there. All other modules save their own clock values relative to this value.
See section 14 Contact information for information about how to retrieve the FAQs. Unlike other emulators, VICE aims to be cycle accurate; it tries to emulate chip timings as precisely as possible and does so efficiently. The emulation has been fully cycle-accurate since version 0.
A rather complete emulation of the SID sound chip is also provided. All the basic features are implemented as well as most of the complex ones including synchronisation, ring modulation and filters. The reSID engine is a lot more accurate than the standard engine, but it is also a lot slower, and only suitable for faster machines.
The following things are missing, though:. The VIC-I video chip is only partially emulated, so some graphical effects will not work correctly. Sound support is implemented, but is still at an experimental stage.
If you think it could be improved and know how to do so, feel free to contact us see section 14 Contact information. The hardware is pretty much the same in each and that is why one single program is enough to emulate all of them.
Both the 40 column and 80 column CRTC video chips are emulated from the onward , but a few of the features are not implemented yet numbers of rasterlines per char and lines per screen. Fortunately, they are not very important for average applications. Of the additional 32k RAM you can use only some in blocks of 4k, but you have to set jumpers on the motherboard for it.
Also, the video controller can handle a larger address range. The that is built into the SuperPET is not emulated, though. The ROM is horribly broken with respect to IEEE they shipped it before they tested it with the floppy drive, so only tape worked.
As well as other low-level fixes the patch obtains the load address for a program file from the first two bytes of the file. Moreover, the secondary addresses used are now 0 and 1 for load and save, respectively, and not arbitrary unused secondary addresses.
Those models are known under different names in the USA and Europe. In addition to that now an experimental C emulation is included. Otherwise the different line of computers are very similar. These computers are prepared to take a coprocessor board with an or Z80 CPU. However these models are not emulated. The basic difference is the amount of RAM these machines have been supplied with.
This implies some banking scheme, as the can only address 64k. It has 2 registers at addresses 0 and 1. The exec bank register at address 0 determines the bank where all other read and write addresses take place.
The C instead has RAM in banks 0 and 1, and uses bank 1 for program and all variables. Many models have been expanded to more than the built-in memory. In fact some machines have been expanded to the full 1M. Those modifications can be emulated as well.
The different settings are described in see section 7. Likewise, pressing ' on the same U. Customized logo Min. Order: 10 Sets. Customized packaging Min. Order: 10 Sets More. Graphic customization Min. Order: 10 Sets Less.
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