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| BSVC Changes | ||
| ============ | ||
|
|
||
| 2.2 to 2.1 (Apr 30, 2015) | ||
| ------------------------- | ||
| BSVC 2.2 is the first major release since 1998, and is an update for modern | ||
| systems. This is a "first pass" release to get BSVC running on modern host | ||
| machines. Specific changes include: | ||
|
|
||
| * Relicensing under the GPL v2.1. | ||
| * Converting the assembler to ANSI C11, adding function prototypes, and | ||
| reformatting the source code. | ||
| * Converting the rest of the system to ANSI C++ and starting to use C++ 11 | ||
| features (auto, lambdas, etc). | ||
| * Replacing some custom linked-list code with STL containers. | ||
| * Replacing most uses of C-style strings with std::string objects. | ||
| * Reformatting the C++ code with 'clang-format' and removing lots of extraneous | ||
| comments. Copyright information is now centralized in a file in the | ||
| distribution top-level. | ||
| * Replaced the recursive Makefile build system with a single non-recursive | ||
| Makefile. The build system now does real dependency analysis. | ||
| * Many code-cleanups throughout the system: it now builds C++ code with -Wall | ||
| and -Werror. | ||
| * Removing Makefiles for obsolete platforms (Ultrix, HP-UX, etc). | ||
| * The sim68000 and sim68360 code was reogranized under a single directory tree | ||
| and now share devices and the S-record loader. | ||
|
|
||
| Additionally, several serious bugs in the simulator were fixed: | ||
|
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||
| * Updating for 64 bit host systems: Negative offsets in address register | ||
| indirect with displacement mode would cause bus errors on systems with | ||
| 64-bit 'unsigned long', since the sign-extension code assumed 32-bit longs | ||
| on the host and the result did not overflow properly (thus yielding an | ||
| 'address' outside of the 32-bit address space). | ||
| Fixed by using a properly sized type for simulator addresses. | ||
| * Events were being lost in the event handling code due to the 'myIterations' | ||
| variable quickly growing so large that the number of microseconds to use when | ||
| searching for the next event to handle became negative. | ||
| Fixed by rewriting the event handler in terms of nano-seconds and clamping | ||
| the minimum time delta per Check() invocation to 1ns. | ||
|
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||
| The system is now working well enough that it can run the distributed samples, | ||
| as well as boot a port of the Xinu (http://www.xinu.cs.purdue.edu) operating | ||
| system. | ||
|
|
||
| ### Administrivia | ||
|
|
||
| BSVC hosting has shifted to github and, as stated, the system has been | ||
| relicensed under the GPL v2.1. | ||
|
|
||
| Additionally, the mailing list has moved and been split into separate 'users' | ||
| and 'announce' lists: | ||
|
|
||
| * bsvc-announce@googlegroups.com: | ||
| [Announcements (low traffic)](https://groups.google.com/forum/#!forum/bsvc-announce) | ||
| * bsvc-users@googlegroups.com: | ||
| [Questions and general discussion](https://https://groups.google.com/forum/#!forum/bsvc-users) | ||
|
|
||
| 2.0 to 2.1 (11/08/98) | ||
| --------------------- | ||
| * Some minor changes were made to the user interface to support Tcl/Tk 8.0 | ||
| * Some minor changes were made to the C++ code to support compiling with GCC | ||
| 2.8.1 | ||
| * Jorand Didier's Motorola 68360 (sim68360) simulator has been added | ||
| to the distribution. It doesn't contain all of the 68360 devices | ||
| but it does provide a CPU32 based simulator. | ||
| * Xavier Plasencia's timer device has been added to the 68000 | ||
| simulator (modeled after the 68230 PI/T timer) | ||
| * Fixed a bug with the MOVEA instruction in the Motorola simulators | ||
| - Thanks to Jorand Didier for pointing this problem out to me | ||
| * Added support for the ABCD and MOVEP instructions to the | ||
| Motorola simulators | ||
| - Thanks to Trappel Martin and Xavier Plasencia for this code | ||
| * Fixed bug in 68000 assembler when using $FFFF as an immediate operand | ||
| - Thanks to Craig A. Haynal for pointing this problem out to me | ||
|
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||
|
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||
| 2.0 Beta 1 to 2.0 (08/08/96) | ||
| ---------------------------- | ||
| * Modified the BSVC C++ framework to use "standard" C++ libraries | ||
| (STL). Most of this work was done by Seunghee Lee so the | ||
| framework could be ported to Windows 95. | ||
| * Some minor changes were made to the user interface to support | ||
| running it under Tcl/Tk for Windows 95. This work was done | ||
| by Seunghee Lee. | ||
| * Modified Sim68000 to work with the new version of the C++ framework | ||
| * Removed the Hector 1600 and MIL-STD-1750A simulators until they | ||
| can be ported to the new framework | ||
| * Fixed a problem with the predecrement and postincrement addressing | ||
| modes when the stack pointer and a byte size operation was specified | ||
| - Thanks to Jorand Didier for pointing this problem out to me | ||
|
|
||
| 1.0.4 to 2.0 Beta 1 (02/10/96) | ||
| ------------------------------- | ||
| * User interface has undergone a major revision | ||
| * Oliver M. Kellogg's MIL-STD-1750A simulator has been added | ||
| to the distribution | ||
| * Breakpoints set using Tutor under Sim68000 work correctly | ||
| * Support for GCC 2.7.2 and Tk 4.0 added | ||
|
|
||
| 1.0.3 to 1.0.4 (07/31/95) | ||
| ------------------------- | ||
| * Stack pointer bug in the ADDA, SUBA, CMPA, and LEA instructions fixed | ||
| - Thanks to James Yuill at NCSU for reporting this bug | ||
|
|
||
| 1.0.2 to 1.0.3 (07/25/95) | ||
| ------------------------- | ||
| * Bug in Sim68000's DIVS, BCHG, BCLR, BSET, and BTST instructions fixed | ||
| - Thanks to Robert Woodside at NCSU for reporting the DIVS bug | ||
| - Thanks to John R Potter at Penn State for reporting Bit instrution bug | ||
| * M68681 interrupt level bug fixed | ||
| * Sim68000 interrupt servicing modified so breakpoints at a service | ||
| routine are handled correctly | ||
| - Thanks to Jonathan Bredin at the University of Pennsylvania for | ||
| making me check the interrupts out | ||
| * Font resources changed for the GUI | ||
| * Insert registers in trace window bug fixed | ||
| - Thanks to Stephanie Watson at NCSU for reporting the bug | ||
|
|
||
| 1.0.1 to 1.0.2 (02/18/95) | ||
| ------------------------- | ||
| * Added support for the SUBX instruction to Sim68000 | ||
| * Bug in Sim68000's CMPM and RTR instructions fixed | ||
| - Thanks to John R Potter at Penn State for reporting the bug | ||
| * Mailing list for BSVC has been setup | ||
|
|
||
| 1.0 to 1.0.1 (02/11/95) | ||
| ----------------------- | ||
| * Memory viewer's dump utility fixed | ||
| * Bug in Sim68000's CMP and CMPA instructions fixed | ||
| - Thanks to John R Potter at Penn State for reporting the bug> | ||
| * Solaris support added | ||
|
|
||
| 1.0b3 to 1.0 | ||
| ------------ | ||
| * The memory viewer has been made larger and faster | ||
| * WWW Home Page selection has been added to the help menu | ||
| This starts a WWW browser pointed at the BSVC Home Page | ||
| * Added code to handle the STOP instruction | ||
| * Fixed a problem with the RTS instruction | ||
| * Unimplemented intructions cause an illegal instruction exception | ||
| * Fixed the 68000 assembler's INCLUDE directive so that it can | ||
| be in any case | ||
| * Compiles with GCC 2.6.2 | ||
|
|
||
| 1.0b2 to 1.0b3 | ||
| -------------- | ||
| * Added an INCLUDE directive to the 68000 assembler | ||
| * Fixed a bug in the Program Listing window that caused it to | ||
| only work for programs listed in ascending order | ||
| * Corrected a small problem with the file selector that caused it | ||
| to "grab" the mouse while reading a directory (This causes problems | ||
| with networked file systems that take a long time to read) | ||
| * Fixed bugs in two of the Framework classes that caused them not | ||
| to compile under GCC 2.6.0 | ||
|
|
||
| 1.0b1 to 1.0b2 | ||
| -------------- | ||
| * Added a BREAK instruction to the 68000 simulator and assembler | ||
| that acts like a breakpoint. When the simulator executes this | ||
| instruction while "running" it will stop running like it | ||
| hit a breakpoint. | ||
| * Added a new file selector to the user interface | ||
| * Fixed several small bugs in the HECTOR 1600 simulator |
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