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--- blog:x68_pro_fault [2020/08/17 11:36] – [Okay, lets replace ALL capacitors] john
+++ blog:x68_pro_fault [2021/02/24 14:03] (current) – [The Final Curtain] john
@@ Line 518: / Line 518: @@
    * [[blog:x68000_pro_ic_list|Sharp X68000 IC list]]
+===== Another Round of Testing =====
 === Audio Circuit Repair Test ===
-{{ :blog:x68000_op-amp_repaired.mp3 |}}
+Well the op-amp and amplifier IC replacement fixed the issue with no sound coming from the speaker unless you had your ear up against it:
-{{jPlayerPlaylist>68000_op-amp_repaired.mp3}}
+{{jPlayerPlaylist>blog:x68000_op-amp_repaired.mp3}}
+It's still not the greatest in the world, but it's fine for a tiny little 0.5w case speaker.
+----
+=== Keyboard ===
+Keyboard is still inactive.
+----
+=== Joystick Ports ===
+Tried an MSX compatible pad in both port 1 and port 2, it doesn't register in Motos. The game won't let you start.
+----
+=== Floppy Drives ===
+Floppy drive 0 still works fine. Floppy drive 1 still spits the disk back out as soon as you've inserted it.
+----
+=== Memory ===
+The onboard 1MB, the additional 1MB from the IOData module and the extra memory on the XSIMM10ss card all test fine in memtest68k.
+----
+=== Booting Human68k DOS ===
+A Human68k dos boot disk still brings up the //"It was not possible to start the system, please reboot"// message.
+----
+==== So What Now? ====
+I'm out of ideas with the system now. I think there is quite likely some damage to one or more of the IC's on the boards, but where to start with that, I've no idea. I don't have a scope and I don't have an electronics background.
+**[Update September 2020]** - So I bought a '__working__' X68000 Pro from Japan, planning to use most of the parts from it to make a fully working system... but upon arrival... well, [[blog:x68_pro_fault2|see for yourself]].
+The plan now is to remove as much of the obviously unaffected components from the new 'donor' system as possible - desoldering chips, if necessary - and transplant them in to my 'mostly working' system that I've spent all of this effort on.
+Stay tuned, I'll be posting more progress below.
+====== The Final Curtain ======
+**[Update 24/02/2021]**
+After spending months more trying to get the system working I only just managed to get it booting a Human68k floppy - despite desoldering the last remaining surface mount chips from the IO sub board. Keyboard still didn't work, joystick still didn't work - making it completely unusable.
+Tracing signals and low level logic debugging is not what I want to get in to, so it's time to draw a line under all of this and move on. Perhaps someone more adept than myself could get this running again. But that's it for me; I need to move on.
+It's pretty sad to say that //were it not for the incorrect PSU wiring diagram//, this would have been an easy job and I'd have had months of fun playing with the system by now.