Am I correct in assuming that the BC command stack (in ENHANCED mode) rolls over at multiples of 4*(Selected Command Stack Size)?
A. No. The size of the BC/RT command stack is programmable by means of bits 14 and 13 of Configuration Register #3. The four choices are: Bit 14 Bit 13 Stack Size 0 0 256 words (64 messages) 0 1 512 words (128 messages) 1 0 1024 words (256 messages) 1 1 2048 words (512 messages) Therefore (for example), if bits 14 and 13 are both “0”, the stack will roll over every 256 words, or 64 messages. The stack will roll over at an address equal to modulo the programmed stack size (e.g., 256, 512, …).
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