-- CALIBRATION: settle the address-unit conventions once and for all.
--
-- Four different conventions have been in play and I keep tripping on them:
--   1. the firmware's own operands (bit addresses, e.g. @0x64000D0)
--   2. the driver's address-map units (BOARD_BASE 0x06400000 + offset)
--   3. the catch-all log's addresses (it printed 0x400000..0x40D7FF)
--   4. the debugger's wpset/bpset units
--
-- The access log PROVES the firmware hits the window at driver address
-- 0x0620000D.  So: watch that, and also the firmware's operand for it, and see
-- which one fires and what wpaddr reports.  Whatever fires calibrates the rest.

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

-- A: the driver-map address (proven hit by VT1200_BOARD_LOG)
dbg:command('wpset 0620000d,10,rw,{ printf "CAL-A wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
-- B: the firmware operand (bit address as printed in disassembly)
dbg:command('wpset 6200010,10,rw,{ printf "CAL-B wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
-- C: the same value shifted the other way
dbg:command('wpset 00620000,10,rw,{ printf "CAL-C wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
print("calibration watchpoints armed: A=0x0620000d B=0x6200010 C=0x00620000")

local maxframes = tonumber(os.getenv("CAL_FRAMES") or "200")
local n = 0
emu.register_frame_done(function()
	n = n + 1
	if n >= maxframes then
		print("done (" .. n .. " frames)")
		machine:exit()
	end
end, "vt1200-cal")

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