IBM 5150's - original 16k-64K machines!

[Sharkonwheels]

I believe I have 3 of them now, access to 4-5 more.

I've only opened 1 up so far, no floppy (I guess it was removed at some time) super clean inside, 8/10 outside.

16kb-64kb motherboard, mono (I beleive) video card, floppy drive controller, some sort of analog input card with a prototyping area on the card, Everex RAM card which looks like it brings it up to 640K (has 2 x 256kb banks, 1 x 64kb bank. I assume 64kb + 64kb +356kb+256kb = 640kb)

Of course, it has the keyboard and cassette ports.

Unfortunately, I do not have any keyboards, or mono/CGA monitors to test with, but judging by the condition, I can;t see a reason why they wouldn't work!


I'll post updates as I open the other 2.

We'll call this one system 1, the one with no floppies, and a bunch of cards!



Tony

[Sharkonwheels]

OK.

Machine #2, Serial Number 0519077

64kb - 256kb mainboard.
360kb FH floppy drive
Floppy controller
CGA display controller
AST SixPackPlus with 384MB RAM (6 x 64kb banks), clock, ser,par


Tony

[Sharkonwheels]

OK.

Machine 3

Serial Number 13864635150

5150, 64kb - 256kb mainboard, 256kb onboard
IBM Mono display controller
IBM memory card with 256KB onboard = total ram = 512KB
IBM Floppy controller
(2) IBM FH 5.25" Floppy drives

Dusty inside, but fine. I'd rate it an 8 or 9 out of 10, cosmetically.
Put in the CGA card from machine 2, and saw a blinking cursor, then went to basic after floppy seek (I gotta find some 5.25" DOS floppies!)


Tony

[modem7]

If the 5150 with the 16K/64K motherboard (and maybe more to come) has the first edition of the BIOS, I'm sure you'll see a few interested parties.
Can you please let us know what date the BIOS is?
I see that you've got BASIC firing up on these machines, and so typing in the following 5 lines of BASIC code will display the date:

10 def seg=&hf000
20 for x=&hfff5 to &hfffc
30 print chr$(peek(x))
40 next
run

If the date displayed is "04/24/81", it's the first BIOS.

[Sharkonwheels]

Alas, no XT keyboards, and no switchable either.

Mebbe I can yank the BIOS and read it on my EPROM burner....


is the KB on a Compaq Portable removable??


Tony

[modem7]

Mebbe I can yank the BIOS and read it on my EPROM burner....
My EPROM burner won't read the AM9264 PROM, without me building an adaptor. It might be the same with yours.

[Sharkonwheels]

i dunno - I'd have to look.

I'm using a Logical Devices XPRO-48 from work.
Thsi is what they use to update the slot machines on the ships.


Tony