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=== Clock Generator === | === Clock Generator === | ||
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=== Coprocessor Interface === | === Coprocessor Interface === | ||
Acorn introduced cache with the ARM3. This meant that most instructions are now coming from the on-chip cache instead of system memory. The way the coprocessor was originally designed in the {{\\|ARM2}} meant that the coprocessor could simply access its instructions from memory. This was no longer compatible with the new design. Acorn solved this problem by making the coprocessor lag behind exactly one cycle. Instructions that are identified as being coprocessor instructions are broadcasted off-chip on the following cycle. This was done using the processor's 32-bit data port along with timing and handshaking signals. | Acorn introduced cache with the ARM3. This meant that most instructions are now coming from the on-chip cache instead of system memory. The way the coprocessor was originally designed in the {{\\|ARM2}} meant that the coprocessor could simply access its instructions from memory. This was no longer compatible with the new design. Acorn solved this problem by making the coprocessor lag behind exactly one cycle. Instructions that are identified as being coprocessor instructions are broadcasted off-chip on the following cycle. This was done using the processor's 32-bit data port along with timing and handshaking signals. |
Facts about "ARM3 - Microarchitectures - Acorn"
codename | ARM3 + |
core count | 1 + |
designer | Acorn Computers + |
first launched | 1989 + |
full page name | acorn/microarchitectures/arm3 + |
instance of | microarchitecture + |
instruction set architecture | ARMv2a + |
manufacturer | VLSI Technology + and Sanyo + |
microarchitecture type | CPU + |
name | ARM3 + |
pipeline stages | 3 + |
process | 1,500 nm (1.5 μm, 0.0015 mm) + |