updated status and added PSU in IMC-2001

1 files changed, 32 insertions, 11 deletions

diff --git a/content/hardware/imc-2001.md b/content/hardware/imc-2001.md
index 28c3f5f..7444f6e 100644
--- a/content/hardware/imc-2001.md
+++ b/content/hardware/imc-2001.md
@@ -9,30 +9,41 @@ This is an old Taiwanese Apple \]\[ / CP/M clone.
 # Status
 
 Trying to fix several issues:
-- power switch made some hissing noises, it was not the switch, now
-  the original power is dead (and some transformers are humming). Ordered
-  a Apple 2 replacement PSU, waiting for it..
+
+- ROM 1 with BASIC is broken (and gets really hot). This explains
+  the booting issues.. (will be tricky to get a replacement). The
+  board layout doesn't fit to the original ROM sizes too..
+- the floppy driver read floppies (both) but both don't write to floppies
+  (when copying in CP/M or creating a file), they work when formatting
+  a drive. Could be a side-effect of the PSU not working properly.
 - the lever moving the contacts between 40-character and 80-character
   mode for the CRT output is corroded, doesn't always make contact
   and produces a flickering image
 - keyboard cable is broken, at least the data line
 - the paddle and the joystick connectors miss some legs for putting them into
   the sockets on the motherboard
+- possibly much more
+
+Fixed issues:
+
+- ~~power switch made some hissing noises, it was not the switch, now
+  the original power is dead (and some transformers are humming). Ordered
+  a Apple 2 replacement PSU, waiting for it..~~
+  The new replacement power supply works like a charm, also replaced
+  the switch, as it was also unreliable
 - ~~sometimes I get into the monitor~~
 - ~~lower-nibble bit 3 of the key
   being pressed is missing, unclear where it is lost, I suspect a
   bad register on the motherboard holding the current ASCII value of
   the key pressed or something similar~~. Replaced a bad 74LS257N,
   works now just fine.
-- ROM 1 with BASIC is broken (and gets really hot). This explains
-  the booting issues.. (will be tricky to get a replacement). The
-  board layout doesn't fit to the original ROM sizes too..
-- possibly much more
-- the floppy driver read floppies (both) but both don't write to floppies
-  (when copying in CP/M or creating a file), they work when formatting
-  a drive. Could be a side-effect of the PSU not working properly.
 
-Known things to work
+Not fixed issues:
+
+- ~~The 220V fan no longer works.~~
+  I just disconected it, I don't think, it really helps to cool the system.
+
+Known things to work:
 
 - The keyboard works electronically (8039 MCS-48 like CPU with a 2K EPROM)
 - the Rockwell R6502 CPU has a phase 0 clock and seems to go through
@@ -44,6 +55,7 @@ Known things to work
 - I can boot from a Apple \]\[ CP/M 56k floppy and I get a prompt, now
   as the keyboard works and the CP/M on the 80-character card I can also
   assume the Z80 is working just fine.
+- the 80-columns card (a Videx Videoterm or rather a clone of it) works just fine.
   
 # Images
 
@@ -76,6 +88,15 @@ both connector are female per default):
 
 {{< figure src="/images/hardware/imc-2001/keyboard_cable.jpg" alt="PCB and controller" >}}
 
+Old PSU:
+
+{{< figure src="/images/hardware/imc-2001/old_psu.jpg" alt="New PSU" >}}
+
+New PSU replacing the old crusty one (this is a standard replacement PSU for
+Apple \]\[ from [Reactive Micro](https://wiki.reactivemicro.com/Universal_PSU_Kit)):
+
+{{< figure src="/images/hardware/imc-2001/new_psu.jpg" alt="New PSU" >}}
+
 # Documentation
 
 This is the "Operation Manual for IMC-2001, version 2.01":