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author ClawGrip <clawgrip@hotmail.com>2019-06-15 14:00:06 +0200
committer GitHub <noreply@github.com>2019-06-15 14:00:06 +0200
commitf21219d83d533ca2c87e452050ae26f39d944d98 (patch)
tree9a909186e3dd32fe0e20a30ad8b272d185023d0f
parenta3b451b8410f671a52c94096114ac42bf530ea12 (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.cpp5
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.
**********************************************************************/