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Document source:
Original backup tapes owned by Dutchman2000, obtained by Atarimania.
Documentary research and PDF layout by Laurent Delsarte.
Note that these backup tapes contain A LOT of information spread out in many folders, meaning it will take time to process the important bits.
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Document identification:
Original file name: EMAIL extracted from CEO.01JUN84
Title of document: Atari interoffice memos & emails about the 1200XL
Author(s): Joe Miller (Joseph B. Miller III) + 1 unidentified
Original file date: 1983-06-29 + 1 undated
Type of document: Memo
Target audience: Internal
Status: Final
Reference (Atari): (unknown)
Reference (Laurent Delsarte):
 For any discussion, this PDF has been given the reference
 BKUP-1983-06-29-MEMO-0014A-0
 which should be quoted in any communication.
Tags: #Atari #8bit #6502 #1200XL
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SUBJECT: 1200 COMPOSITE VIDEO OUTPUT CORRECTION

Due to Mr. XXXXX miscalculation of the composite video and luminance resistors,
the resistors values have to be changed to correct the composite and luminance
video outputs from the present 700mV to 1V p-p. For calculation, see attached
sheet.

The calculation shows that the composite video and luminance resistors should
be 100 ohms (R23 & R24) and 300 ohms(R25 & R28) to ground. The Q11 emitter
resistor (R22) has changed to 5.1K to obtain the same DC level of sync tip and
peak white within the specification of the modulator. The sync resistor (R188)
has increased to 1.5K to obatin approximately 1/3 of the sync to picture ratio.
The reason for not having exactly 1/3 of the sync to picture ratio is to keep
buzz in the audio to a minimum. With the new correct 1V p-p composite video and
luminance, the software monitor was checked and performed satisfactorily. This
should equally apply to any make of monitor.

The modification should be a running change in production.
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  INTER OFFICE MEMO


  To:  Dave Stubben
  From: Joe Miller
  Subject: 1200XL Issues      29 June 83


 This memo addresses some of the issues raised by John Ebbs
 concerning consumer and trade reactions to the 1200XL, speci-
 fically those which are software related.

  [SYSTEM RESET]

 Problem:    Pressing [SYSTEM RESET] intermittantly causes a
      cold start, resulting in loss of a BASIC program
      in memory.

 Current Status:  We determined this was caused by excessive RESET
      key-bounce on some 1200 keysets, and we extended
      the de-bounce delay by.1 second in O.S. Rev 11.
      This solved the problem, but we will continue to
      hear about this one until Rev 11 actually makes
      it into the field.


  [BREAK] Anomalies

 Problem:    Pressing [BREAK] while BASIC is performing a
      LIST is intermittantly ignored.

 Current Status:  Fixed in SURELY Rev A, therefor the fix will not
      appear until the 600/800/1400/1450 line reaches
      the market. We have  never  received reports of
      the [BREAK] key causing a cold start, as indi-
      cated in John Ebbs memo.


  Printer Errors

 Problem:    If a BASIC program makes a CIO call to disk
      drive #2 (or higher) immediately prior to a
      CIO printer request, the print request will
      fail. (This  only  occurs from a BASIC program.)

 Current Status:  Fixed in SURELY O.S. Rev B.


  APX Compatibility

 Problem:    Many cassette-based APX titles were found to
      be incompatible with the 1200.

 Current Status:  This was due to 'illegal' use of Operating
      System entry points by the APX loader program.
      Changes were made in O.S. Rev 11 to resolve
      the problem.


     Dave Stubben
 June 29, 1983



  3rd Party Compatibility

 Problem:    Many aren't.

 Current Status:  As you know, this is caused by blatant disregard
      of published guidelines for Operating System use
      by outside developers. Some of the APX titles
      were also caught by this one. We can help med-
      iate the problem, somewhat, by releasing a RAM-
      based 800 Operating System on disk, switching
      off the 1200 O.S. ROM.


  Technical Documentation

 Problem:    We have yet to produce any external technical
      literature describing how one uses the extended
      features of the 1200. And we're rushing head-
      long into the same situation with the entire
      XL line.


 Current Status:  A number of efforts are currently underway, but
      the recent RIF has devastated our in-house
      writing resource. I've suggested that we pro-
      duce a series of 'Application Notes' covering
      specific technical areas, in lieu of a single,
      all-encompassing document. We're working with
      Jim Inscore and Jeff Belding to get this going.
      Focussed efforts in this area by the Systems
      Software Group will, of course, affect our
      other work schedules.


 I've attached Scott's detail of differences between REV 10
 and REV 11 Operating Systems on the 1200. Indeed, some of the
 software issues raised by John Ebbs' memo have been addressed by
 REV 11. The sooner we can get it into the field the better.


 cc: D. Abel
  L. Plummer
  S. Scheiman
  D. Sovey