home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Simtel MSDOS 1992 September
/
Simtel20_Sept92.cdr
/
msdos
/
pc_jr
/
jrnotes.arc
/
JRNOTES.DOC
< prev
next >
Wrap
Text File
|
1988-01-21
|
12KB
|
381 lines
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
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 ***