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author Cowering <cowering@users.noreply.github.com>2016-03-21 12:43:29 -0500
committer Cowering <cowering@users.noreply.github.com>2016-03-21 12:44:02 -0500
commit8179e313e588329aa1230ae04f3352e5111506ef (patch)
treec934b870d164fffa464be783c88dbf6f58b2a9be /src/devices/bus
parent13e8e27678d668f4deef10038114b0c27d3ce35f (diff)
another tiny doc update for A7800 (NW)
Diffstat (limited to 'src/devices/bus')
-rw-r--r--src/devices/bus/a7800/a78_slot.cpp9
1 files changed, 5 insertions, 4 deletions
diff --git a/src/devices/bus/a7800/a78_slot.cpp b/src/devices/bus/a7800/a78_slot.cpp
index 65b32272820..825c0a6f5fd 100644
--- a/src/devices/bus/a7800/a78_slot.cpp
+++ b/src/devices/bus/a7800/a78_slot.cpp
@@ -707,6 +707,7 @@ WRITE8_MEMBER(a78_cart_slot_device::write_40xx)
[*] Cart type:
+ (byte 54)
bit 0-7 - Hardware "flags"
bit 0 [0x01] - POKEY at $4000
bit 1 [0x02] - SuperCart bank switched
@@ -715,11 +716,11 @@ WRITE8_MEMBER(a78_cart_slot_device::write_40xx)
bit 4 [0x10] - bank 6 at $4000
bit 5 [0x20] - banked RAM at $4000
bit 6 [0x40] - POKEY at $0450
+ bit 7 [0x80] - currently unused
- bit 8-15 - Special values
- 0 = Normal cart // normal compared to what? perhaps this should be 'unused'
- 1 = Absolute (F18 Hornet)
- 2 = Activision (Double Dragon & Rampage)
+ (byte 53)
+ bit0 set = Absolute mapper (F18 Hornet)
+ bit1 set = Activision mapper (Double Dragon & Rampage)
-------------------------------------------------*/