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Release Notes

This chapter describes interesting features and problems for the 7.3 release.

News

The last full release of the MIT Scheme system was version 7.1.3 in 1991. Since that time, there was a partial release of version 7.2 for i386/i486 machines and some MIPS R3000 machines. This section summarizes the changes that have occurred since version 7.1.3. The changes are divided into two parts: those that were incorporated in the 7.2 partial release, and those that were subsequently incorporated.

Changes from Release 7.2 to 7.3

This is an abbreviated list of the changes that have been incorporated in the 7.3 release since the (partial) 7.2 release.

Changes from Release 7.1 to 7.2

This is an abbreviated list of the changes that were incorporated in the (partial) 7.2 release since the 7.1 release.

C Back-End Release Notes

This release introduces an important new feature: the compiler can generate output in C, which can then be compiled and linked using the usual C development tools. This feature is being used to support architectures, such as the SPARC and IBM RS6000, for which the compiler does not have native-code support.

MIT Scheme systems that have been built using this compiler feature are referred to as C back-end systems. This section provides a brief description of the features and known problems for such systems.

General Notes

This section describes the general design of C back-end systems.

Problems with the C Back-End

This section details problems and shortcomings of the system that are specific to the C back-end.

PC Release Notes

Known Problems in this Beta Release


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