The IBM 5155 - Portable Computer weirdness from the 1980's!

Рет қаралды 4,188

Күн бұрын

Just what is an IBM 5155, and why does it have so many
graphic/screen options? Also, why did I use it to play Nintendo
on? Join me as I rebuild, restore and find out all about it!
TIMESTAMPS:
0:00 - Introduction
1:24 - Some History stuff
9:10 - What hardware is in this thing?
12:49 - Testing the hardware
18:21 - Playing Nintendo on the in-built monitor
19:46 - Cleaning/restoration of the case
27:19 - Reassembly and testing
30:01 - Playing around with composite CGA and multiple monitors
35:30 - Outro
VIDEO LINKS:
8-bit guy CGA video :
• CGA Graphics - Not as ...
RetroSpector78 Dual monitors on 5150:
• IBM 5150 PC with dual ...
Songs used in this video (All music by Technoaxe: teknoaxe.com):
Epic Chiptune Thunderdome
Chiptune Roller Derby
Behold a Square horse
Groovy Elevator
Down in the Bog
Basic Electro
Hanging Loose at the Record store
Square Boy Shuffle

Пікірлер: 29

@Epictronics1 2 жыл бұрын

excellent video!

@44CT232 2 жыл бұрын

Glad that I was able to help get that PSU sorted for you. Really enjoyed the video, and that machine definitely turned out very nice after its restoration and cleanup :)

@ohsoretro5612 2 жыл бұрын

Thanks again man! I obviously wouldnt have been able to do this video without your help!

@Yukatoshi 2 жыл бұрын

"man veg" lol

@remasteredretropcgames3312 2 жыл бұрын

Advanced history lessons. Thanks bro.

@charonunderground8596 2 жыл бұрын

Grand Prix Circuit ! Fantastic game !

@TRSpectre 2 жыл бұрын

Nice one Oh So Retro!

@sunderark 2 жыл бұрын

That South African power plug and sockets scare me.

@mathieuguillemain 2 жыл бұрын

Very cool ;) I have a very similar setup with an IBM 5155 topped by a 5151 monitor in dual-display mode, except that I hooked the internal CRT to the Berg connector of an ATI EGA Wonder 800 instead of a CGA card. The image quality on the amber display is much better that way and pairs beautifully with the crisp MDA/Hercules!

@whiskeyjuliet 2 жыл бұрын

A fantastic video! Loving your style of presentation. 💾

@ohsoretro5612 2 жыл бұрын

Thanks so much, really appreciate the kind words!

@synclavier123 2 жыл бұрын

I bought a 5155 from an electronics recycler a few months ago. It's in a good condition, and with some time and patience I got it running again. I wish I had that Datamini Turbo board, though.

@synclavier123 Жыл бұрын

Update: It seems that I can get an NEC v20 chip to replace the 8088 and then an overclock mod to get the entire speed to run around 8MHz.

@JVHShack 2 жыл бұрын

Why isn't this channel recommended more? You deserve more subs! Also, I have questions to ask, but no email address...

@ohsoretro5612 2 жыл бұрын

Thanks so much! you can send mail to ohsoretro2020@gmail.com

@segbed 2 жыл бұрын

grand prix circuit a really cool small game, I remember I have payed it on 486 laptop.

@username_1985 8 ай бұрын

Woooooh! Random Chicken Footage 🥳🥳🥳🥳🥳

@segbed 2 жыл бұрын

btw did you see somewhere a goldstar laptop based on 486 cpu with removable infrared trackball ? It was really cool device when I was a child but now I can't find even picture in internet.

@PixelPipes 2 жыл бұрын

Reading that article on RLL controllers in your video, it seems that 32MB would be correct for your 20MB Seagate drive, as RLL controllers can use MFM drives and get more storage out of them. So that's why you weren't seeing any errors. It really is effectively bigger, and is probably completely alien and unrecognizable to a regular MFM controller at that point.

@ohsoretro5612 2 жыл бұрын

Thanks! Yeah this whole RLL/MFM stuff is pretty new to me, but it does seem to work fine though. I was just a bit concerned that the drive wasnt "designed" to be an 33mb RLL drive so that there may be issues..

@peachgrush 2 жыл бұрын

@@ohsoretro5612 Back in the day, you could actually swap your MFM disk controller with an RLL one and gain both performance and capacity from an existing MFM disk. An RLL controller is - as you said - over-formatting an MFM disk by using a more efficient data layout. In the end, MFM drives are just platters with direct connection between their heads and a controller, so the controller may choose any read/write scheme that doesn't exceed physical capabilities of platters. "Plain MFM" is just extremely inefficient with the format, especially on outer tracks.

@ohsoretro5612 2 жыл бұрын

@@peachgrush Thanks for the info! So was there any actual physical difference then between the RLL and MFM version of the same drive? LIke the ST-225 and ST-238R for example, or was it just branding bascially?

@hansoak3664 2 жыл бұрын

@@ohsoretro5612 Pairing an RLL controller and the ST-225 was very common. I did it on most of my 8088 systems back in the day. On the BBS scene we would get some people posting that "we were asking for trouble" with our drives but I never had even a hint of trouble from the practice over the years.

@ohsoretro5612 2 жыл бұрын

@@hansoak3664Thanks for the info! I was using this machine again the other day though and the boot sector kinda died..even though the data is all still there.. so I think I might have run into a RLL/ST-255 problem :(

@kofteburger 2 жыл бұрын

Liked the video for chicken footage.

@chaoticsystem2211 Жыл бұрын

vrooooom

@Dryadwoods Жыл бұрын

Hi, I've just spent the last 2 days seeing most of your videos. I noticed you stop posting..... I hope everything is well with you. Take care and hope to get an answer from you.

@ohsoretro5612 Жыл бұрын

Hiya, thanks for all the views and the kind words.. unfortunately I had a fairly major life change a few years back and havent really got back into making videos..