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- ES10079 Error in PCjr Technical Reference Manual Color Conn.
-
- 00/00/00
- PCjr Color Display (4863001)
- IBM PCjr System Unit/keyboard (4860067)
- Technical Reference (1502293)
-
- The connector shown on page 3-94 of the Technical Reference
- Manual is mislabeled. The colors are shown in the wrong
- order. The correct color order is BLUE, RED, INTENSITY,
- GREEN. These colors correspond with pins 5,3,6, and 4.
- *** END OF DOCUMENT ***
- AH10226 How to find out how much memory is on the system
-
- 11/11/85
- BASIC Interpreter by Microsoft (6025010)
-
- KEYWORDS: INFORMATION
- The amount of memory on the system unit may be found by
- using the following line:
-
- 10 DEF SEG=0
- 20 MEM=(256*PEEK(&H414))+PEEK(&H413)
- *** END OF DOCUMENT ***
- WY10032 Compact Printer Graphics Screen Dumps
-
- 12/12/85
- PCjr System Unit/Keyboard (4860004, 4860067)
- Compact Printer (5181001)
- PCjr Color Display (4863001)
-
- KEYWORDS: INFORMATION PROBLEM SOLUTION
-
- To allow the contents of the PCjr color display to be
- printed on an IBM Personal Computer Compact Printer you must
- use Dos 3.0 or above. Load Graphics.Com with the
- Compact parameter, then you can do graphics screen dumps
- using the compact printer.
- *** END OF DOCUMENT ***
-
- Note : This modification or recommendation has not been subjected to
- exhaustive testing and may not, in all circumstances, provide
- a complete solution.
- AH10233 Control-break - example of changing interrupt vector
-
- 11/11/85
- BASIC Interpreter by Microsoft (6025010)
- PCjr BASIC (Cartridge) (6024101)
-
- KEYWORDS: INFORMATION
- Following is a program that demonstrates changing an
- interrupt vector from BASIC. The vector being changed is
- the Control-break interrupt vector (interrupt number 1B, the
- Keyboard break interrupt) located at hex address 6C-6F, or
- decimal 108-111. The vector will be changed to the
- Dummy_Return vector, which effectively disables the
- Control-break key. Please see the Technical Reference
- manual for your system unit for more information about
- interrupt vectors.
-
- 10 CLS:DEFINT A-I
- 20 DIM A(4)
- 30 DEF SEG=0
- 40 FOR I=1 TO 4
- 50 A(I)=PEEK(107+I) 'Save old interrupt vector
- 60 NEXT I
- 70 LOCATE 10,18
- 80 PRINT "Press any key to inhibit control-break";
- 90 A$=INKEY$:IF A$="" THEN GOTO 90
- 100 POKE 108,83 'Set to dummy_return vector..
- 110 POKE 109,255
- 120 POKE 110,0
- 130 POKE 111,18
- 140 LOCATE 15,18
- 150 PRINT "Control-break now inhibited - try it";
- 160 LOCATE 16,27
- 170 PRINT "(Press spacebar to exit)";
- 180 A$=INKEY$:IF A$=" " THEN 190 ELSE 180
- 190 FOR I=1 TO 4
- 200 POKE 107+I,A(I) 'Reset old vector
- 210 NEXT I
- 220 LOCATE 20,20
- 230 PRINT "Control-break is back on - try it";
- 240 GOTO 240
- *** END OF DOCUMENT ***
- TGW0049 PCjr with internal modem and serial printer
-
- 07/17/85
- PCjr Internal Modem (8600008)
- Compact Printer (5181001)
-
- KEYWORDS: PROBLEM SOLUTION INSTALLATION INFORMATION
-
- If an Assistant Series program is used on a PCjr that has
- the IBM Internal Modem and the IBM Compact Printer installed
- then option 1 (Select Printer) in SETUP is used to select
- printer type "9 Other" and COM2: to indicate the serial
- printer port is the selected output device. Use option 2
- (Set up serial card) in SETUP to initialize the serial
- printer port with these parameters:
-
- Baud Rate = 1200
- Parity = none
- Data Bits = 8
- Stop Bits = 2
- XON/XOFF = n
- *** END OF DOCUMENT ***
- EMS0017 REDIRECTION OF LPT1. PCJR INTERNAL MODEM REDIRECTED
-
- 10/23/85
- IBM PCjr (4860067)
-
- A base model PCjr with no internal modem and no parallel
- printer adapter automatically sends output intended for
- LPT1: to the serial port (for the Compact printer). Hence,
- the use of the serial device is transparent to the user.
- This serial port is also COM1: with no options installed.
- If an internal modem is installed the serial port then
- becomes COM2:. Under these conditions the printer output is
- then sent to the COM2: serial port (the Compact printer).
- This is handled automatically by ROM BIOS.
-
- If a parallel printer adapter is attached, the output
- intended for the printer is automatically sent to the newly
- attached parallel printer. To use the Compact printer,
- output must be redirected to the serial port.
-
- MODE COM1:1200,N,8,2,P
- MODE LPT1:=COM1:
-
- The above two DOS commands work on a PCjr without an
- internal modem. COM2: is used when the modem is installed.
- *** END OF DOCUMENT ***
-
-
- To All Jr Owners:
- Here is a packet of information I received from IBM's
- main technical support database system. There are a few
- other notes regarding obscure programs on the Jr. like
- Homeword, I didn't bother to include them.
- There are a few files that are not specific to the jr.
- but they apply anyway.
- Good luck with your jr's
-
- Sincerely,
-
- Charles Eicher
- Computerland of Studio City
- 11313 Ventura Blvd
- Studio City, CA 91602
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- EMS0030 PCjr Keyboard scan codes different
-
- 11/01/83
- IBM PCjr System Unit/keyboard (4860067)
-
- Single character scan codes are identical.
-
- The extended scan codes released by the PCjr keyboard are
- slightly different than the PC's. If the Fn key is not
- released before pressing the f7-10 keys the following is tru
- **Shift F9 gives no scan code on the PCjr.
- **Ctrl F8, Ctrl F9, and Ctrl F10 give no scan code.
- **Alt F7 also results in no scan code being released.
-
- The shift print screen works just like the PC. The Control
- Print Screen is replaced by Fn/Echo.
- *** END OF DOCUMENT ***
- JC20024 PCjr Time of Day Clock Gains Time.
-
- 07/16/85
- IBM PCjr System Unit/keyboard (4860067)
-
- Keywords: Problem Information
-
- The PCjr time of day clock gains time each time a disk
- access is performed. This is a known BIOS problem and at
- this time a solution has not been reached.
- *** END OF DOCUMENT ***
- GB10005 PCjr Serial Port
-
- 07/17/85
- UNIT-SYSTEM JR (4860067)
-
- KEYWORDS: PROBLEM REUUIREMENTS SOLUTION
-
- The maximum speed for the ASYNC port on the PCjr is 4800
- baud.
-
- This may make it difficult to install some serial devices
- unless the devices have the capability to adapt to this
- speed.
- *** END OF DOCUMENT ***
- GB10007 PCjr Function Key Usage
-
- 07/17/85
- IBM PCjr System Unit/keyboard (4860067)
-
- KEYWORDS: INFORMATION PROBLEM SOLUTION
-
- PCjr function keys may appear not to function if the correct
- procedure is not followed. The proper use is to press and
- RELEASE the Fn key before pressing a numeric key. In the
- case of extended codes the shift or the alt key is held down
- while pressing and RELEASING the Fn key then while still
- holding the shift or alt key depressed, pressing the numeric
- key. The keyboard definition chart in the PCjr GTO states to
- press and hold certain keys but does not say to release
- others.
- *** END OF DOCUMENT ***
- JC20007 Use of ALT key to enter extended codes on the PCjr.
-
- 07/17/85
- UNIT-SYSTEM JR (4860067)
-
- KEYWORDS: INFORMATION PROBLEM
-
- This document is to clarify the use of the ALT key on the
- PCjr keyboard when entering the extended codes. When using
- the ALT key to enter the extended codes, the keyboard must
- be in Numeric Lock first. To put the keyboard into Numeric
- Lock, hold ALT and press FN, then N. (This is a toggle, to
- take the keyboard out of Numeric Lock, repeat the same
- procedure.) Once the keyboard is in Numeric Lock, all 256
- extended codes may be entered by holding down the ALT key
- and then typing in the numeric value of the extended code.
- See page 4-9 in the Guide to Operations Personal Computer -
- PCjr manual, PN:1592292.
- *** END OF DOCUMENT ***
- MV10124 Using a PCjr as a terminal on XENIX
-
- 07/20/85
- PC XENIX OPERATING SYSTEM (6024207)
- UNIT-SYSTEM JR (4860067)
- KEYWORDS: INFORMATION SOLUTION INSTALLATION REQUIREMENTS
-
- A PCjr can easily be attached to a system running XENIX as a
- "dumb" terminal. A PCjr is a good choice because in
- addition to its use as a terminal, it can also be used as a
- stand alone computer.
-
- For relatively low cost, a user can have both a terminal
- and a powerful computer.
- *** END OF DOCUMENT ***
- DLE0026 Non-Maskable Interrupt problem in DOS 2.1
-
- 08/02/85
- IBM PCjr System Unit/keyboard (4860067)
- DOS Disk Operating System Ver. 2.0 (6024061) & 2.1 (6024120)
-
-
- KEYWORDS: PROBLEM INFORMATION UPDATE
-
- There is a problem in DOS 2.1 that may manifest itself by
- hanging the system after a keystroke in any application and
- will be restricted mainly to the PCjr.
-
- A patch to correct the problem is available on the DOS
- 1.1/2.0/2.1 PATCH Diskette. This diskette is available on
- request from the Dealer Support Center.
- *** END OF DOCUMENT ***
- RS10026 Program Languge Compilers on the PCjr
-
- 08/07/85
- FORTRAN Compiler Version 1.0 (6024012)
- Pascal Compiler Version 1.0 (6024010)
- IBM PCjr System Unit/keyboard (4860067)
- FORTRAN Compiler Version 2.0 (6024127)
- Pascal Compiler Version 2.0 (6024128)
-
-
- KEYWORDS: INFORMATION INSTALLATION REQUIREMENTS
-
- Yes, the language compilers can run on the IBM PCjr. You
- must take several factors into consideration. Lets list
- these first.
-
- 1. Both of the version 2.0 compilers require 160KB of
- memory for DOS 2.0 and 190KB for later versions of DOS.
-
- 2. Both of the version 2.0 compilers require two diskette
- drives.
-
- The IBM Software Guide(dated September 1984) stipulates that
- the above compilers "Needs extended memory with the PCjr".
- If you look at the MINIMUM SYSTEM REQUIREMENTS section of
- the same brochure, the FORTRAN, and PASCAL entries states
- that the IBM PCjr requires 512KB to apportion between user
- memory and RAM disk".
-
- The 512K breaks down as follows: approximately 32KB for
- DOS, 16KB for Video Buffer, 160KB for the particular
- compiler, and 314KB for a RAM disk. In this manner the
- requirements are met, and the compiler will execute
- properly.
- *** END OF DOCUMENT ***
- EF10144 Screen intensity
-
- 09/05/85
- IBM PCjr BASIC (with Cartridge) Version 1.0 (6024101)
- IBM PCjr System Unit/keyboard (4860067)
-
- KEYWORDS: INFORMATION
-
- ThePCjr provides for full contrast/brightness on all types
- of monitors when it is running with DOS 2.1 but, when the
- machine goes into BASIC either directly or via a program,
- the screen intensity drops to approximately half. On the
- display, full gain on contrast and brightness controls does
- not allow you to regain a normal brightness. This is true
- in Cassette or cartridge BASIC. The intensity is purposely
- dimmed so that it does not overdrive an RGB or composite
- monitor. To get full brightness on the display enter the
- following BASIC statement:
-
- Screen 1,0
-
- This statement will set your screen to high intensity.
-
- *** END OF DOCUMENT ***
- JC20006 PCjr Cartridge Basic Screen Mode 5 or 6
-
- 10/11/85
- IBM PCjr BASIC (with Cartridge) Version 1.0 (6024101)
- IBM PCjr System Unit/keyboard (4860067)
- PCjr Power Expansion Attachment (8600006)
-
-
- KEYWORDS: PROBLEM SOLUTION INFORMATION
-
- Basic Statement, SCREEN, Modes 5 or 6 are supported in
- Cartridge Basic only and require a minimum of 128K of
- memory. If you have not issued the Basic Statement
- CLEAR,,,32768 prior to issuing SCREEN, Mode 5 or 6, an
- Illegal Function Call will result. See Basic Personal
- Computer - PCjr Manual (6024101), for the CLEAR statement
- and for the SCREEN statement.
- *** END OF DOCUMENT ***