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A functional difference between the 41C Full- and Half-Nut LCD driver?
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A functional difference between the 41C Full- and Half-Nut LCD driver?
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A functional difference between the 41C Full- and Half-Nut LCD driver?
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10-13-2022, 12:14 PM
(This post was last modified: 10-13-2022 12:20 PM by Ángel Martin.)
Post: #2
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RE: A functional difference between the 41C Full- and Half-Nut LCD driver?
Yes, Sylvain's tests confirm there's an actual difference in the way the LCD is managed between FN and HN machines.
See attached the actual code. The only difference is in instruction at 9x4750: the FN version uses JNC-43 instead of JNC-44, and therefore skips (i.e. does not execute) the READ 14(d) instruction at 0x4724 within the [NXTCHR] loop. As per the emulators question, the HN version works like a charm on V41 and DM-41X. "To live or die by your own sword one must first learn to wield it aptly." |
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A functional difference between the 41C Full- and Half-Nut LCD driver? - J-F Garnier - 10-13-2022, 12:04 PM
RE: A functional difference between the 41C Full- and Half-Nut LCD driver? - Ángel Martin - 10-13-2022 12:14 PM
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