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author | ClawGrip <clawgrip@hotmail.com> | 2019-06-15 14:00:06 +0200 |
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committer | GitHub <noreply@github.com> | 2019-06-15 14:00:06 +0200 |
commit | f21219d83d533ca2c87e452050ae26f39d944d98 (patch) | |
tree | 9a909186e3dd32fe0e20a30ad8b272d185023d0f | |
parent | a3b451b8410f671a52c94096114ac42bf530ea12 (diff) |
o2.cpp: Add notes about the O2 Keyboard MCU (Zilog "RT101+228A") [Sean Riddle]
Some info discovered after decapping the Zilog MCU from the default Sgi Keyboard for the O2
-rw-r--r-- | src/mame/drivers/o2.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mame/drivers/o2.cpp b/src/mame/drivers/o2.cpp index dacb0a43e33..37c457f50a0 100644 --- a/src/mame/drivers/o2.cpp +++ b/src/mame/drivers/o2.cpp @@ -12,6 +12,11 @@ 1f000000 - 1f3fffff MACE 1fc00000 - 1fc7ffff Boot ROM 40000000 - 7fffffff RAM + +NOTE: The default Sgi O2 Keyboard (Model No. RT6856T, Part No. 121472-101-B, + Sgi No. 062-0002-001) has a Zilog "RT101+228A" MCU, which is really a + Zilog Z8615 (a Z8-based PC keyboard controller) with 4K ROM (undumped). + It might have a custom ROM, since it had special marking. **********************************************************************/ |