mirror of
https://git.k-space.ee/arti/vt1200.git
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43 lines
1.7 KiB
Lua
43 lines
1.7 KiB
Lua
-- CALIBRATION: settle the address-unit conventions once and for all.
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--
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-- Four different conventions have been in play and I keep tripping on them:
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-- 1. the firmware's own operands (bit addresses, e.g. @0x64000D0)
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-- 2. the driver's address-map units (BOARD_BASE 0x06400000 + offset)
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-- 3. the catch-all log's addresses (it printed 0x400000..0x40D7FF)
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-- 4. the debugger's wpset/bpset units
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--
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-- The access log PROVES the firmware hits the window at driver address
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-- 0x0620000D. So: watch that, and also the firmware's operand for it, and see
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-- which one fires and what wpaddr reports. Whatever fires calibrates the rest.
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local machine = manager.machine
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local cpu = machine.devices[':maincpu']
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local dbg = machine.debugger
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if not dbg then
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print("ERROR: debugger not enabled; pass -debug")
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machine:exit()
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return
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end
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-- A: the driver-map address (proven hit by VT1200_BOARD_LOG)
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dbg:command('wpset 0620000d,10,rw,{ printf "CAL-A wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
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-- B: the firmware operand (bit address as printed in disassembly)
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dbg:command('wpset 6200010,10,rw,{ printf "CAL-B wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
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-- C: the same value shifted the other way
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dbg:command('wpset 00620000,10,rw,{ printf "CAL-C wpaddr=%08X data=%04X acc=%02X pc=%08X\\n", wpaddr, wpdata, wpaccess, pc ; g }')
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print("calibration watchpoints armed: A=0x0620000d B=0x6200010 C=0x00620000")
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local maxframes = tonumber(os.getenv("CAL_FRAMES") or "200")
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local n = 0
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emu.register_frame_done(function()
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n = n + 1
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if n >= maxframes then
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print("done (" .. n .. " frames)")
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machine:exit()
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end
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end, "vt1200-cal")
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dbg.visible_cpu = cpu
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dbg.execution_state = 'run'
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