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author | AJR <ajrhacker@users.noreply.github.com> | 2017-10-09 23:12:20 -0400 |
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committer | AJR <ajrhacker@users.noreply.github.com> | 2017-10-09 23:12:39 -0400 |
commit | 3c48b3a1e85b2d40260dadc5249c89b224d08413 (patch) | |
tree | ffc8c678b7af1817b566a146af1d8f876baed544 /src/devices/machine/i8155.cpp | |
parent | 03d7b524d1db469a2ae113e12aedbb36295cf88a (diff) |
i8155: Trivia (nw)
Diffstat (limited to 'src/devices/machine/i8155.cpp')
-rw-r--r-- | src/devices/machine/i8155.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/devices/machine/i8155.cpp b/src/devices/machine/i8155.cpp index fcb44bafe30..f543ec4573f 100644 --- a/src/devices/machine/i8155.cpp +++ b/src/devices/machine/i8155.cpp @@ -4,6 +4,13 @@ Intel 8155/8156 - 2048-Bit Static MOS RAM with I/O Ports and Timer emulation + The only difference between 8155 and 8156 is that pin 8 (CE) is + active low on the former device and active high on the latter. + + National's NSC810 RAM-I/O-Timer is pin-compatible with the Intel + 8156, but has different I/O registers (including a second timer) + with incompatible mapping. + **********************************************************************/ /* |