Nonpareil status
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10-16-2022, 08:07 PM
Post: #20
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RE: Nonpareil status
Thanks Tony! That's a big help!
Anyone following along should note that Tony chose to use the six bits of a character code in exactly the way the PICK PRINT 6 instruction (octal 1660) grabs them from the ACT C register, whereas I chose to reorder them, rotating the lowest order two bits to the higest order, so that the resulting low order 4 bits match those used in the four bit print instructions (PICK PRINT 0 through 3, octal 1420, 1520, 1620, 1720). In the four-bit print instructions, two bits of the opcode are added to each four-bit value from the C register, and Tony puts those two bits at the low end, whereas I put them at the high end. Neither is wrong; there are arguments to be made either way, I chose based on liking the 0 though 9 characters having consecutive codes 0x30 through 0x39. That was a purely aesthetic decision; as long as the simulator code deals with things consistently, the result is the same. |
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