243 lines
8.5 KiB
HTML
243 lines
8.5 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>History</TITLE>
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</HEAD>
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<BODY>
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<H1>Revision history</H1>
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<CITE>
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"Those days, the Third Age of Middle-earth,<BR>
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are now long past, and the shape of all lands<BR>
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has been changed."
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</CITE>
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<HR>
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This emulator started as a player routine for C64 music on the Amiga.
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Versions V1.x were written in 68K assembly language, versions V2.x in a mix
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of 68K assembly and C. V3.x/V4.x are portable versions written in C++.<P>
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<H3>V1.x/V2.x</H3>
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<UL>
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<LI>Amiga 68K versions
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</UL>
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<H3>V3.0</H3>
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<UL>
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<LI>First release of BeOS/Unix version, features processor-level 1541
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emulation and built-in SID emulation
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</UL>
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<H3>V3.0a</H3>
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<UL>
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<LI>Implemented SID test bits
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<LI>Combined SID waveforms respect pulse width
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<LI>Corrected idle state graphics display
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<LI>Processor-level 1541 emulation respects .d64 error info
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<LI>CPU emulation optimized (6510 and 6502 split)
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<LI>VIC emulation optimized (raster counter in local variable in EmulateLine())
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<LI>BeOS: Now exiting the audio subscriber with ExitStream(TRUE)
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<LI>Unix: Fixed missing thread_func() declaration
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<LI>Unix: getcwd(AppDirPath) was missing in main_x.i
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<LI>Unix: Speed limiter works
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</UL>
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<H3>V3.0b</H3>
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<UL>
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<LI>Implemented REU emulation
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<LI>Formatting disks with ID possible under processor-level 1541 emulation
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<LI>Corrected and optimized SID waveform/envelope calculation (signed arithmetic)
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<LI>Corrected idle state display again (ECM text)
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<LI>1541 D64 mode ignores drive numbers when opening the directory
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<LI>Processor-level 1541 emulation deactivates when idle
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<LI>BeOS: Sound output quality is now 16 bits
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<LI>Unix: Quits more cleanly, reactivates key repeat
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<LI>Unix: Fixed alignment problem with text_chunky_buf in VIC.h
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</UL>
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<H3>V3.0c</H3>
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<UL>
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<LI>1541 DIR mode can load directory with "$0"
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<LI>Rearranged the CPU code (more macros, less inline functions)
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<LI>SID envelope generators rewritten, envelopes are now recalculated for every sample
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<LI>SID calc_buffer function now takes pointer to WORD buffer
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<LI>Unix: Sound for Linux
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<LI>Unix: Prefs window implemented (needs Tcl/Tk)
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<LI>Unix: Corrected x64 disk image detection on little-endian systems
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<LI>Unix: SVGAlib support works again, accesses frame buffer directly if possible
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<LI>Unix: Added support for SHM under X11
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</UL>
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<H3>V3.0d</H3>
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<UL>
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<LI>SID filter emulation implemented
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<LI>SID master volume setting works again
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<LI>Flags are recalculated in MOS6526::SetState()
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<LI>Changed CBOOL->bool in some places
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<LI>Fixed bug with char_in in MOS6510::new_config()
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<LI>BeOS: Emulation thread priority lowered
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<LI>Unix: Some changes for DEC Alpha
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<LI>Unix: Joystick support for Linux
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</UL>
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<H3>V3.0e</H3>
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<UL>
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<LI>Removed the CBOOL data type
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<LI>Unix: Sound for HP-UX
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<LI>Unix: Keyboard layout matches the picture in the docs more closely
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<LI>Unix: Diagonal directions of keypad joystick emulation work
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<LI>Unix: +/- on numerical keypad modifies SkipFrames
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<LI>Unix: F9 invokes SAM
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<LI>Unix: Drive LEDs and speedometer implemented
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<LI>Unix: Some changes to the GUI
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<LI>Unix: Random number generator is initialized
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<LI>Unix: Name of prefs file can be given as an argument
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<LI>Unix: Calls XFlush() and XSync() in C64Display::Update()
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</UL>
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<H3>V3.0f</H3>
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<UL>
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<LI>Improved DIR/D64 drive reset, resetting the C64 resets the drives
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<LI>Implemented 'G' command for DIR/D64 drives
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<LI>Corrected translation of 0xc1..0xda characters in conv_from_64()
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<LI>BeOS: Implemented smart "Insert next disk" menu item
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<LI>Unix: Improved the speedometer/LED bar
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<LI>Unix: Self-calibrating joystick routines
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<LI>Unix: No need to enter path of 'wish' in TkGui.tcl
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</UL>
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<H3>V3.0g</H3>
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<UL>
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<LI>New T64/LYNX mode for 1541 emulation
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<LI>1541fs.cpp/match() used to treat the pattern "foo" as "foo*"
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<LI>1541 DIR mode uses tmpfile() for opening temporary directory files
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<LI>1541 D64 mode allows wildcards for selective directory reading
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<LI>Increased compatibility of processor-level 1541 emulation in various places (C64<->1541 communication, VIA registers, memory map, disk change flag)
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<LI>Inlined MOS6526::EmulateLine() and some small public functions of MOS6502_1541
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<LI>New prefs option to enable/disable SID filter emulation
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<LI>Joystick calibration is reset when joystick options change
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<LI>BeOS: Self-calibrating joystick routines
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</UL>
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<H3>V3.0h</H3>
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<UL>
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<LI>Implemented SID notch filter, better resonance frequency calculation
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<LI>Fixed bug with SID filter option
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<LI>CIA timer B one-shot mode stops timer when counting undeflows of timer A
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<LI>Implemented lightpen trigger
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<LI>BeOS: Fixed for BeOS DR8, improved the GUI a bit
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<LI>Unix: Some fixes to the TkGui (T64, SIDFilters, removed speed display)
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<LI>Unix: Main window no longer resizable
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<LI>Unix: SVGALib support works again
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</UL>
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<H3>V3.1</H3>
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<UL>
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<LI>BeOS: Joysticks work again
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</UL>
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<H3>V3.1a</H3>
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<UL>
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<LI>Frodo SC ported
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<LI>Processor-level 1541 emulation supports reading GCR data, removed the faked job loop
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<LI>Corrected ISB, RRA, SBX and SHA instructions
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<LI>The last line of Y expanded sprites wasn't drawn
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<LI>Light pen registers work
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<LI>Small fixes to 1541d64/1541t64
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<LI>CIA 2 PRA write: IEC lines respect DDRA
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<LI>Better triangle waveform (12 bits)
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<LI>SID emulation can play sampled sounds
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<LI>New "Ignore SID Volume" prefs item for better sample playing
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<LI>'*' on numerical keypad toggles speed limiter
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<LI>BeOS: '/' on numerical keypad toggles processor-level 1541 emulation
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<LI>BeOS: Safer quitting
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<LI>BeOS: Option to use GameKit (screen)
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<LI>BeOS: Replaced srand(system_time()) with srand(real_time_clock())
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<LI>Unix: Sun makefile
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</UL>
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<H3>V3.1b</H3>
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<UL>
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<LI>Corrected SID sustain behaviour
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<LI>Reading from write-only SID registers returns the last byte written to the SID
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<LI>No more distortions when playing samples
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<LI>Removed the "Ignore SID Volume" prefs item again
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<LI>Combined SID waveforms now sampled from a 6581R4
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<LI>Improved 1541 VIA timer operation
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<LI>Fixed bug in 1541 head movement
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<LI>Raster IRQs can be triggered by writing to $d011/$d012
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<LI>Some changes for the MacOS port
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<LI>Included autoconf stuff from Bernd
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<LI>Frodo SC: Fixed some CIA timer bugs
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</UL>
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<H3>V3.1c</H3>
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<UL>
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<LI>Ported to AmigaOS
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<LI>Fixed bug in IEC::Reset()
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<LI>Fixed bug when writing to SID registers >24
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<LI>The SID noise waveform should now sound the same on all platforms
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<LI>Removed all calls to tolower() in SAM.cpp because of possible side-effects if tolower() is a macro
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<LI>Drive LEDs are only updated once per frame
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<LI>.d64/.t64 files are opened with read permissions only
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<LI>Fixed bug with read_char buffering in 1541fs.cpp/1541t64.cpp
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<LI>Frodo SC: Fixed memory trashing bug in MOS6569::draw_background()
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<LI>Unix: Drive LEDs blink on error
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<LI>Unix: Added more patches from Bernd
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</UL>
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<H3>V4.0</H3>
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<UL>
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<LI>The C64 ROM files are now included
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<LI>Unix: Added SVGAlib keyboard patches from Bernd
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</UL>
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<H3>V4.0a</H3>
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<UL>
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<LI>Corrected BRK, ANE, ARR, SBX and DCP instructions
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<LI>Frodo SC: Improved the CIA timers
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<LI>Frodo SC: MOS6526::EmulateCycle() split into MOS6526::EmulateCycle() and MOS6526::CheckIRQs()
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<LI>Frodo SC: Corrected interrupt behaviour of branch instructions
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<LI>BeOS: Sound calculation is now done in stereo
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</UL>
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<H3>V4.1</H3>
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<UL>
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<LI>Integrated Win32 and RiscOS ports
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<LI>Snapshot support
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<LI>Added page-crossing and "borrowed" cycles in line-based CPU emulation (Frodo PC)
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<LI>Added precise CIA cycles for line-based emulation (Frodo PC)
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<LI>Optional fixed-point arithmetic and precomputed filters in SID.cpp
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<LI>Optional dynamic alignment checks in VIC.cpp
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<LI>Changed typedefs and constants (BYTE, WORD etc.)
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<LI>Unix: Better configure script
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<LI>Unix: Sound support for Solaris 2.x
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<LI>Unix: Joystick can be toggled between port 1/2 with the NumLock key
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<LI>Unix: US keyboard layouts supported
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<LI>BeOS: Fixed for BeOS AA:DR9
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<LI>BeOS: Can now switch between window/screen mode while the emulation is running, speeded up full screen mode
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<LI>BeOS: Prefs saved in /system/settings/Frodo_settings by default
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</UL>
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<H3>V4.1a</H3>
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<UL>
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<LI>Fixed bug in IEC::NewPrefs()
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<LI>Optimized VIC emulation for speed
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<LI>BeOS: Prefs saved in /boot/home/config/settings/Frodo_settings
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<LI>BeOS: Directory panel works again
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<LI>BeOS: Correct C64/1541 clock frequency ratio (Frodo SC)
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<LI>BeOS: Correct audio mixing/clipping
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</UL>
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<H3>V4.1b</H3>
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<UL>
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<LI>Unix: Updated Tcl/Tk preferences editor [Gerard Decatrel]
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<LI>Unix: Added SDL display driver which is the default if SDL >= 1.2 is detected by the configure script
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<LI>Unix: Increased number of sound buffers from 4 to 16 (emu10k driver doesn't work with the smaller value)
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<LI>Unix: Fixed some small compilation problems
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</UL>
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</BODY>
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</HTML>
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