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- Simplified the effective address functions.
- Made SuBEditor a bit faster.
- JSR, and RTS now support using the RS prefix, which
is used to specify the return address size, with an
RS prefix of 0 being a return address size of 64
bits, rather than 8 bits.
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instruction formatting simpler.
- Refactored the instruction table of the emulator's
assembler, it now has two parts, the addressing mode
bits, and the base value.
The base value is what's used to generate the actual
opcode, with the addressing mode bits telling the
assembler what addressing modes this instruction
supports.
The reason for doing this was to use less space. For
comparison, the previous version used 870 bytes for
the instruction table, while the new version uses
only 222 bytes. The new version is nearly 4 times
smaller than the pervious version.
- The B register based ALU instructions now use their
own addressing mode, and are specified by using 'b'
as the operand for those instructions.
For example, to add the Accumulator with the B
register, you now use "ADC B" instead of "AAB".
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The reason for doing this was because JSL, and RTL are
redundent, as they both do the same thing as JSR, and
RTS.
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emulator smaller, and faster.
I am also starting to make SuBEditor's source code
more readable.
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We're now Free Software!!!
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