2500XL  
(250-4074)               Boards                       Faxback Doc. # 1153

INSTALLATION OF EGA IN A 2500XL (250-4074) USING THE 25-3048 OR 3048A BOARD
                                                                        
You will first have to hook up a VGA monitor to the computer so that you
can run SETUPXL. In the SETUPXL program you must tell the computer to   
RE-MAP the Shadow Memory, and show 384K for extended. Then press (F2) to
update to these changes, and let the computer re-boot. Then power the   
computer down, and remove the cover. Change jumper E15-E16 to E14-E15,  
this disables the onboard VGA. Configure the 25-3048 board according    
to the monitor in use and install it.

│     FYI    Notes for the     2500XL      Computer                        │
├──────────────────────────────────────────────────────────────────────────┤
│The 2500XL is a AT compatible 80286 CPU, with Tandy 1000 TL type features,│
│like the Sound Capabilities, and DOS 3.3 & DeskMate built into ROM.       │
│                                                                          │
│Comes with:                                                               │
│-----------------                                                         │
│1 Meg memory expandable to 16 meg  (only 15 meg addressable at this time) │
│DOS 3.3 & DeskMate built into ROM                                         │
│SmartDrive Technology built in   (DOESN'T SUPPORT HARD CARDS!)            │
│Sound Capabilities ( these are NOT the same PORT ADDRESSES as the 1000s)  │
│Standard AT type CMOS... plus a 2K  EEPROM                                │
│PS/2 type Keyboard connector                                              │
│PS/2 type Mouse Connector                                                 │
│3 Horizontal AT type card slots & accepts FULL length IBM 13" boards.     │
│                                                                          │
│OPTIONS                                                                   │
│-----------------                                                         │
│8 MHz 80287 Math Co-Processor   (only runs at 8 MHz)                      │
│Additional Memory kits                                             ┌──────┤
│Supports the use of SCSI drives                                    │ MORE │
└───────────────────────────────────────────────────────────────────┴──────┘
┌──────────────────────────────────────────────────────────────────────────┐
│     FYI    Notes for the  2500XL                                         │
├──────────────────────────────────────────────────────────────────────────┤
│OTHER NOTES                                                               │
│--------------                                                            │
│If booted off of ROM it boots in approximately  2.4 Seconds.              │
│It will Accept 3 Floppy Drives  (2 - 3.5"  &  1 - 5.25")                  │
│Will Run OS/2                                                             │
│You can Adjust ALL setup options! (there are NO hidden screens.. "/A" )   │
│Has Microphone / Earphone Jacks                                           │
│The default CPU speed can be set to 5 MHz or 10 MHz with a jumper.        │
│Don't install boards with chips on the "backside" into the bottom slot.   │
│    IRMA & DCA boards have the components & chips mounted on the back...  │
│The speaker volume is adjustable in the SETUP program.                    │
│Use motherboard memory expansion kits, not cards.                         │
│The Keylock on the CPU is "MINIMUM SECURITY" (This WILL be "perfected")   │
│The Speaker & Reset Connector pins are NOT labeled... put them back right!│
│There are jumpers for ROM select, BUS speed & VGA enable/Disable.         │
│The NUMLOCK key is enables on power-up                                    │
│Shadow RAM can be mapped as Extended memory through the SETUP.            │
│HEADLIN chip set configures the EMS memory as LIM 4.0 standard.    ┌──────┤
│                                                                   │ MORE │
└───────────────────────────────────────────────────────────────────┴──────┘
┌──────────────────────────────────────────────────────────────────────────┐
│     FYI    Notes for the  2500XL                                         │
├──────────────────────────────────────────────────────────────────────────┤
│OTHER NOTES  (continued)                                                  │
│-------------------------                                                 │
│                                                                          │
│Be aware it is recommended that the SmartDrive, # 25-4123 be used in the  │
│   2500 XL due to the difference in height limitations                    │
│                                                                          │
│Jumpers on the mother board should be labeled.  Here is a list of what    │
│   the factory installed jumpers indicate...                              │
│                                                                          │
│        ROM select for standard BIOS versus DeskMate BIOS                 │
│        Bus speed divided by 2 or 10 MHZ / 2 = 5 MHZ  (not labeled)       │
│        Disable VGA circuitry                                             │
│        Use of Interrupt 9  (Video)                                       │
│        Clear the CMOS (reset)                                            │
│                                                                          │
│                                                                          │
│                                                                          │
│                                                                   ┌──────┤
│                                                                   │ END  │
└───────────────────────────────────────────────────────────────────┴──────┘

(/tmc-09/08/95)