# IBM Model 4840

# Specs
Intel Celeron 2.0 GHz
Single core 32-bit

2GB RAM (2 x Crucial 1GB DDR)

Motherboard i845GV-SMC192
Video Intel Integrated 82845G

# Ports

## Main unit
Rear: 
4 x USB 2.0
3 x RJ-45 Serial
1 x Parallel
1 x VGA
1 x Ethernet 10/100
1 x 12-volt USB
1 x 24-volt USB
1 x Distributed customer display port
1 x PS/2
2 x Cash drawer connectors

Side:
2 x USB 2.0
1 x PS/2
1 x PC Card Type 2
1 x External Floppy
1 x Mic In
1 x Headphones Out


## Tablet
2 x USB 1.1
1 x Ethernet

# Documents
{{ projects:ibm4840-manual.pdf |}}


# Drivers

## Windows
https://public.dhe.ibm.com/software/retail/poseng/surepos500/
https://theretroweb.com/chipsets/319

apparently no win7 drivers, you can install old winxp drivers by using "Add legacy hardware" in device manager... (see https://blog.hqcodeshop.fi/archives/194-Long-live-Windows-XP-Building-a-Windows-7-desktop-from-scrap-heap.html)


## Linux
https://www.linuxquestions.org/questions/linux-hardware-18/ibm-surepos-4840-w-suse-10-2-touchscreen-won%27t-work-511411/
https://elosupport.elotouch.com/hc/en-us/p/Driver-Linux-Intel

https://www.freedesktop.org/wiki/Software/xinput_calibrator/


# Original configuration
Photos here
{{ :projects:pxl_20260527_152318603.jpg?direct&400 |}}
{{ :projects:pxl_20260527_152815232.jpg?direct&400 |}}
{{ :projects:pxl_20260527_152813126.jpg?direct&400 |}}

# Project
Swap out the internals with something bearable. Design adapters for display and tailgate I/O board
Side I/O could also work with an adapter
Back of case is no problem (besides PSU specific mounting method) since I do not have the original plastic back for it
3D print something after internals are settled

## Display
LVDS
{{ :projects:g121sn01-v3.pdf | Display datasheet}}


## Power supply
130W PI Electronics from 2006 (!). Failing fan. Proprietary cradle for locking in case.
Could swap out internals with something modern.


# Temporary system
windows 7 and linux dualboot

linux xorg on this thing is hell
xvesa works from tinycorelinux
too much working porting it over to alpine
gonna just use tinycore on this
works okay

can use as dumb terminal for a more powerful computer