-- Watch the video-memory test's accesses with their VALUES, to see what it
-- expects versus what it gets.  The test reports failing at bit address
-- 0x40000C and walks in 0x400000 steps.
--
--   WP2_FRAMES=400 <mame> vt1200 ... -autoboot_script harness/mame/wp2.lua

local machine = manager.machine
local cpu = machine.devices[':maincpu']
local dbg = machine.debugger

if not dbg then
	print("ERROR: debugger not enabled; pass -debug")
	machine:exit()
	return
end

-- Watch a window around both candidate locations for the video memory
-- (the reported failing address is 0x40000C; the driver-side catch-all saw
-- traffic at 0x400000-0x40D7FF).
dbg:command('wpset 400000,1000,rw,{ printf "WP-A %08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
dbg:command('wpset 4000000,1000,rw,{ printf "WP-B %08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
print("watchpoints armed: A=0x400000..0x400FFF  B=0x4000000..0x4000FFF")

local maxframes = tonumber(os.getenv("WP2_FRAMES") or "300")
local n = 0
emu.register_frame_done(function()
	n = n + 1
	if n >= maxframes then
		print("done (" .. n .. " frames)")
		machine:exit()
	end
end, "vt1200-wp2")

dbg.visible_cpu = cpu
dbg.execution_state = 'run'