On 26/02/2026 01:33, Seymour J Metz wrote:
You wrote " the right nibble is not checked", which is incorrect; it is check to to whether to copy it or to ignore it.
The right nibble is never ignored. If it is a valid digit, it is handled in the usual way for a digit, by expanding it to a byte and storing it. If it is a value in the range 1010 to 1111, ED sets the S-trigger to zero if the sign is +.
There is an ambiguity as to how alternate signs are handled.
???
-- Shmuel (Seymour J.) Metz
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