updated IMC-2001 status

1 files changed, 19 insertions, 9 deletions

diff --git a/content/hardware/imc-2001.md b/content/hardware/imc-2001.md
index 3524717..1ea1ec5 100644
--- a/content/hardware/imc-2001.md
+++ b/content/hardware/imc-2001.md
@@ -13,15 +13,6 @@ Trying to fix several issues:
 - the CRT shows some flickering and diagonal effects. Testing on an old TV
   shows the same issue (so I suspect it's some grounding/shielding issue
   with the new PSU).
-- floppies written read/written with Fluxengine don't really work either
-  on the real hardware or the emulator. Suspecting a encoding/decoding issue.
-- the floppy drives read floppies (both) but they don't write to floppies
-  (when copying in CP/M or creating a file), they work when formatting
-  a drive on CP/M though. ~~Could be a side-effect of the PSU not working properly.~~
-  The PSU has been replaced, the voltages look ok, so I rule out the PSU.
-  Could be some missing code in the Apple ROM (but that would be weird to
-  call 6502 firmware code from the Z80 CPU). It could also be the write
-  current being to low for writting (but why does formatting a drive work then?!)
 - 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
@@ -32,10 +23,27 @@ Trying to fix several issues:
 - 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
+- the second floppy drive (the more used one) now sees floppies always as
+  "write protected". Diagnostic tests show alignment issues of the drive, this
+  could be true, or the clone always had a different alignment than a default
+  Apple 2 drive?
 - possibly much more
 
 Fixed issues:
 
+- ~~the floppy drives read floppies (both) but they don't write to floppies
+  (when copying in CP/M or creating a file), they work when formatting
+  a drive on CP/M though. ~~Could be a side-effect of the PSU not working properly.~~
+  The PSU has been replaced, the voltages look ok, so I rule out the PSU.
+  Could be some missing code in the Apple ROM (but that would be weird to
+  call 6502 firmware code from the Z80 CPU). It could also be the write
+  current being to low for writting (but why does formatting a drive work then?!)~~
+  So, yes. DOS 3.3 and CP/M both use some ROM routines from ROM1 to write to disk.
+  Works now.
+- ~~floppies written read/written with Fluxengine don't really work either
+  on the real hardware or the emulator. Suspecting a encoding/decoding issue.~~
+  Updating Fluxengine solved the issue, also choosing 96dpi 5 1/4" for the real
+  floppy drive. :-)
 - ~~the keyboard reset line cannot be taken to ground on the keyboard, works
   with shrtening ground and reset though just fine. Must be a bug on the
   ICs of the keyboard controller or a broken trace.~~ Fixed with a botch
@@ -83,6 +91,8 @@ Known things to work:
 - the 80-columns card (a Videx Videoterm or rather a clone of it) works just fine.
 - the highres graphic mode works just fine, I can run "Peter Anvin Chess" and play it.
 - Applesoft BASIC works fine
+- the new Super Serial Card II I got works fine, though it looses characters
+  (without parity and adding some delay in minicom). Definitely usable.
   
 # Images