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Fix CM description (#1076)

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Wolfgang Stubig 2025-05-15 14:25:48 +02:00 committed by GitHub
parent 807b3c8ea1
commit c217990d6d
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1 changed files with 6 additions and 2 deletions
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8
src/emucore/CartCM.hxx
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@ -47,8 +47,12 @@ class System;
D6 = Audio out to tape player and 4017 CLK
1 -> increase key column (0 to 9)
D5 = 4017 RST, and RAM direction. (high = write, low = read)
1 -> reset key column to 0 (if D4 = 0)
0 -> enable RAM writing (if D4 = 1)
if D4 = 1:
0 -> enable key column CLK via D6
1 -> reset key column to 0 (CLK via D6 disabled)
if D4 = 0:
0 -> enable RAM writing
1 -> enable RAM read
D4 = RAM enable: 1 = disable RAM, 0 = enable RAM
D3 = keyboard row 3 input (0 = key pressed)
D2 = keyboard row 1 input (0 = key pressed)