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Minor README changes
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@ -216,12 +216,9 @@ Example assembler code using the `custom0` mnemonic:
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#### maskirq
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The "IRQ Mask" register contains a birtmask of masked (disabled) interrupts.
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This opcodes writes a new value to the irq mask register and reads the old
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value.
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Enable/disable interrupt sources. This instruction is encoded under the
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`custom0` opcode:
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The "IRQ Mask" register contains a bitmask of masked (disabled) interrupts.
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This instruction writes a new value to the irq mask register and reads the old
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value. This instruction is encoded under the `custom0` opcode:
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0000011 00000 XXXXX 000 XXXXX 0001011
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f7 rs2 rs f3 rd opcode
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