IBM 5324 Model F Keyboard (System/23 Datamaster "floortop" keyboard)
Posted: 27 May 2023, 02:53
by fricked
This is not a bigfoot. This is the keyboard for the System/23 Datamasters that did not have integrated keyboards. Very similar physically to the bigfoot but the 5324 has a bigger forehead.
More pics
Spoiler:
Keyboard One:
Spoiler:
top is f xt
cleaned up real nice
4429669 8130
Z0 P A 866411
Intel '77
L1324455
8273565
IBM 9314
1 F25 2260
561 6646...
BP 870976TS
X 8301 S MALAYSIA
158 2604
0G 851380
8246EG SINGAPORE
Keyboard Two:
Spoiler:
feet
Spoiler:
the feet in second one have metal screw into insert like so
but the other one i twist real hard and doesnt go
good as new - -
Conversion
Spoiler:
The goal is to remove the Secondary PCB and convert the keyboard by interfacing with the Primary PCB (the one with all the keys and the Intel chip).
Here is what I have mapped out of the original pcbs so far (open image in new tab to zoom in):
I am guessing this is 8-bit parallel output; that bigger chip on Secondary PCB probably just inverts them or something. But so far I can't get it to output anything. In fact, the controller is usually not even scanning the keys. Presumably I need to do something with pins Orange and Babyblue. Maybe some kind of clock? It would be epic if the chips had any useful markings.
I tried powering mystery driver chip directly with 5v but it just holds pins Orange and Babyblue high.
The cable on yours comes out at a different spot on the back, though. Probably a design improvement for ease of access to the 60% storage compartment.
Re: IBM 5324 Model F Keyboard
Posted: 27 May 2023, 16:06
by sharktastica
Muirium wrote: 27 May 2023, 10:03
Ah, the Bigfoot. The classiest keyboard cover ever made.
The cable on yours comes out at a different spot on the back, though. Probably a design improvement for ease of access to the 60% storage compartment.
This is a different bigfoot. The one you pictured with the three-setting feet are IBM 5291/5292 keyboards, this one is the keyboard for the non all-in-one version of the Datamaster. OP's one has just a single long foot and slightly larger bezels. Similar vibe though.
Re: IBM 5324 Model F Keyboard
Posted: 27 May 2023, 16:44
by TNT
I didn't even know there were different versions of the bigfoot F. Which one is rarer?
Re: IBM 5324 Model F Keyboard
Posted: 11 Jun 2023, 21:48
by fricked
Update:
Beginning conversion attempt (updated original post; see 'Conversion' section). Seeking any ideas for how to continue.
Worst case ontario I can just stick an xwhatsit onto the conveniently placed test points on the rows and columns. If I take this route, do I need to remove the original chips to avoid frying them? With how rare these keyboards are I do not want to be destructive
EDIT:
Silly me I forgot the Internet is a thing. Seems this keyboard assembly minus the daughterboard is identical to that of the 5322 Datamaster.
