Menu: Settings → Emu64 Settings → Emulation
The settings in the Emulation setup window have direct impact on the C64 or the emulated C64. To make these changes on a real C64 you would have to change ICs (for example EPROMs) or install additional hardware.
Floppy Emulation
If there is a check in the checkbox you will use an emulated Floppy 1541 Modell II. Turning off the floppy emulation rises the PC performance but then you can only direct load C64 programs. This might be interesting for slow computers.
DA
Use this pulldown menu to set the device address of the floppy. You can use values from 8 to 11.
Use the pulldown menu to choose the VIC (Video-Interface-Chip) Type.
| You can choose from the following models | |
|---|---|
| MOS-6569 | [PAL-B] |
| MOS-8565 | [PAL-B] |
| MOS-6567R56A | [NTSC-M] |
| MOS-6567R8 | [NTSC-M] |
Note
PAL und NTSC are formats to display the TV screen. PAL (Phase Alternation Line) is used in europe and NTSC (National Television System Committee) is used in the USA. Both formats use different screen refresh rates (Hz) which also influences the C64. If a C64 has a built in VIC-NTSC the machine will run a little bit faster than a model with a built in VIC-PAL. If a program was written on a PAL machine and is run on a NTSC machine it runs a bits faster. You can notice this when music is playing for example. You can say NTSC = 60 Hz and PAL = 50 Hz.
SID means Sound Interface Device and sure is the best known chip within the C64. The SID is responsible for the sound of the C64. The SID chip is not strictly digital, it also has analoge attributes to it.
An original C64 has MONO sound, but Emu64 offers the possibillity to activate a second SID for a STEREO mode. You can even mix different SID types. There have been built a lot of different variations for a real C64. Emu64 doesn't emulate a specific additional hardware.
Original SID
Use this pulldown menu to choose the SID type. You can choose between two SID Chips.
| MOS-6581 |
| MOS-8580 |
The MOS-6581 was used in the first C64s. For the C64-II and later C64 models the MOS-8580 chip was used. You can actually hear the difference within the analog filters, especially when the sound is digitalized. So some games sound better with a MOS-6581. This is no error within Emu64, this recreates the real SID attributes Commodore made.
Note
Emu64 plays the audio signal on both channels of your PC in original mode.
StereoSID
If you activate StereoSID (set a check in the checkbox) Emu64 emulates a stereo sound output with separated audio channels. The two greyed out pulldown menus are activated when entering StereoSID mode.
StereoSID Pulldownmenu
Choose the SID type with the pulldown menu just like for the normal SID mode. You can mix different SID types.
IO Range
This pulldown menu is used for the StereoSID Mode so that the second SID is addressed with a correct address. The most common address is $D420.
Note
When in StereoSID mode Emu64 plays the audio output separated on the speaker channels of the PC. The original sound is on the left channel and the additional stereo channel is on the right channel. Stereo sound only works with fitting C64 software and a correctly set IO Range.
Cycle Correct Emulation
If this checkbox is deactivated the SID output is not 100% correct anymore but the emulation is lighter on your PC.
Filter Emulation
The SID chip features analoge filters you activate and deactivate with this option. To have the original SID sound emulation set a check in this checkbox.
You can have other operating systems on you C64 besides the original operating system. To do this PROMs were changed with EPROMs and different kernel changes were performed. For some kernels even the floppy had to be modified.
A ROM set within Emu64 consists of 4 ROM imagefiles (Kernel, Char, BASIC and 1541). Emu64 offers 2 ROM sets as a default. The original C64 OS and the Exos ROM. Choose between the two with the pulldown menu.
Use the button to set up your own ROM set. To do so a new window is opened after you clicked the button.
Enter the name of the ROM Set in the first line. With the 
buttons you open a filebrowser to select the desired ROM imagefiles. With the 
button you create a new folder in the Emu64 installation folder where the selected ROM images are copied to. A lot of kernels use parts of the original C64 ROM set. If you don't set a ROM image for one of the options Emu64 uses the original file. You can cancel everything with the 
button and the window closes.
Note
The ROM imagefiles are the same filetype as the files used to burn EPROMs. This is no special format. The format for the ROM files is *.ROM.
Use the button to delete created ROM sets. Select the ROM set you want to delete with the pulldown menu before clicking the button. After deleting a ROM set, the ROM set for Emu64 is changed to the original C64 ROM set. You cannot delete the original C64 ROM set and the Exos ROM set.
Since Version 4.30beta2 Emu64 automatically saves the last C64 state. If this option is activated the last C64 state is automatically loaded when starting Emu64.
You can also use the option Tools → Quick Freezing → Load Backup to load the last C64 state.
Close the setup window with the red cross 
in the upper right corner of the window and all changes are safed.
Note
All changes can be made while Emu64 or a program is running.
Note for Save C64 State before closing
This option was removed for Automatically load last C64 State since Version 4.30beta2.
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help text for Emu64 up to version 4.32.
