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README
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1995-12-19
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55 lines
Short: C64 emulator, V2.0
Uploader: bauec002@goofy.zdv.uni-mainz.de (Christian Bauer)
Author: bauec002@goofy.zdv.uni-mainz.de (Christian Bauer)
Type: misc/emu
Replaces: misc/emu/FrodoV1_5.lha
Version: 2.0
Requires: AmigaOS 2.1, 68020
Frodo is a multitasking freeware C64 emulator for the Amiga.
OS2.1 and a 68020 (or better) are required, as well as copys of
the original C64 ROMs, which are not included.
This emulator focuses on the exact reproduction of special graphical
effects possible on the 64, and has therefore relatively high system
requirements. Using a 68060-50 and a CyberVision card gives about
140-160% of the original C64 speed in standard text mode in the
emulation's most precise mode and about 700% in its fastest mode.
Using a line-based VIC model, Frodo is capable of running most games
and demos correctly, even those with FLI, FLD, DYCP, open top/bottom
borders, multiplexed sprites etc. A single-cycle version of the
emulator, "Frodo SC", is included that runs even those programs that
fail on the line-based emulation.
A graphics card (any one whose modes are selectable with a screenmode
requester will do) is strongly recommended for faster display as the
emulator's routines have been designed for a chunky display memory.
Some small demo programs and the full source code in C and assembly
language are included in the archive.
Changes from V1.5:
- Completely new graphics handling, removed all graphics card specific
code
- More precise emulation of the DEN bit in register $d011
- Small optimizations to the VIC and 6510 routines
- On startup the RAM is initialized (almost) like on the real C64
- 100% correct ADC/SBC in decimal mode
- Better emulation of addresses 0 and 1
- Better NMI triggering
- Fixed CIA interrupt handling
- Pressing F9 could cause pending interrupts to be lost
- 1541 Open routine checks for file name buffer overflow
- Closing 1541 channel 15 closes all open files
- Read-only .d64 and x64 disk image file support
- Four types of SID emulation: None, the SID card, 6581sid.library
and playsid.library
- Menus for the prefs window and the emulation window
- Loadable/saveable preferences, prefs files are Frodo's "projects"
- Integrated assembler/monitor (SAM)
- Speedometer and speed limiter
- Corrected the SID card schematics and included a DeliTracker player
module for the card
- Includes Frodo SC