Add write-through cached RAM for Mac experiments

[pistorm] / mac68k.cfg

diff --git a/mac68k.cfg b/mac68k.cfg
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+# CPU type is by default 68EC020, try 68000 or 68010 if EC020 doesn't work with the ROM.
+# (CPU support on classic Macs seem to be severely limited by the system ROM used, and later ROMs are needed for any 32-bit CPU.)
+cpu 68EC020
+
+# Map any size ROM to a the (max) 512KB KB system ROM default address with OVL enabled.
+# (From what I could tell, the ROM was mirrored across this entire 512KB space regardless of physical capacity.)
+map type=rom address=0x400000 size=512K file=system.rom ovl=0 id=sysrom
+
+# Map X KB/MB of RAM starting at $0. The type of this RAM map is "wtcram", which is short for Write Through Cache RAM.
+# It appears that the Mac Classic sound/video chips can't write to RAM, only read from it, so this should be sufficient
+# unless there's something I've missed. Only uncomment one of these lines at any time, depending on how much physical RAM is installed.
+#map type=wtcram address=0x0 size=128K id=sysram
+#map type=wtcram address=0x0 size=256K id=sysram
+#map type=wtcram address=0x0 size=512K id=sysram
+#map type=wtcram address=0x0 size=1M id=sysram
+#map type=wtcram address=0x0 size=2M id=sysram
+#map type=wtcram address=0x0 size=2560K id=sysram
+#map type=wtcram address=0x0 size=4M id=sysram
+
+# Number of instructions to run every main loop.
+loopcycles 300
+# Set the platform to Mac68k to enable all the registers and stuff.
+platform mac68k
+
+#setvar iscsi
+# ... Just kidding!
+#setvar iscsi0 system.hdf
+#setvar iscsi1 simcity2000.hdf
+
+# No keyboard/mouse forwarding is available for Mac68k, and uncommenting any of these lines won't do anything.
+# Forward keyboard events to host system, defaults to off unless toggle key is pressed, toggled off using F12.
+# Syntax: keyboard [grab key] [grab|nograb] [autoconnect|noautoconnect]
+#   "grab" steals the keyboard from the Pi so Amiga/etc. input is not sent to the Pi
+#   (also helps prevent sending any ctrl-alt-del to the Amiga from resetting the Pi)
+#
+#   "autoconnect" connects the keyboard to the Amiga/etc. on startup
+#keyboard k nograb noautoconnect
+# Select a specific filename for the keyboard event source.
+# This is typically /dev/input/event1 or event0, but it may be event3 with for instance a wireless keyboard.
+# Use ls /dev/input/event* to check which event files are available and try until you find the one that works.
+#kbfile /dev/input/event1
+# Forward mouse events to host system, defaults to off unless toggle key is pressed on the Pi.
+# Syntax is mouse [device] [toggle key] [autoconnect|noautoconnect]
+# (see "keyboard" above for autoconnect description)
+#mouse /dev/input/mice m noautoconnect