Vintage Keyboards + IBM 5160 Teardown

[JP!]

Today was a big mail day I spotted this one on eBay just a few days ago as a BIN and couldn't pass it up even though I already have some IBM PC's and and some XT keyboards.

1.JPG (391.64 KiB) Viewed 2312 times

This lot came with an XT keyboard plus a second keyboard which I didn't ask about. I figured I would get some crappy BTC keyboard.

1b.jpg (194.13 KiB) Viewed 2312 times

2.JPG (841.33 KiB) Viewed 2312 times

3.JPG (148.12 KiB) Viewed 2312 times

Omron B3G-S Amber switches. Nice and clicky and they feel nice!

4.JPG (354.22 KiB) Viewed 2312 times

Interestingly this came shipped from Texas.

5.JPG (531.22 KiB) Viewed 2312 times

6.JPG (595.13 KiB) Viewed 2312 times

7.JPG (424.52 KiB) Viewed 2312 times

Aftermarket dust cover

9.JPG (395.84 KiB) Viewed 2312 times

This template means business

10.JPG (1.27 MiB) Viewed 2312 times

11.JPG (533.3 KiB) Viewed 2312 times

Brand new

8.JPG (351.92 KiB) Viewed 2312 times

The teardown

Spoiler:

13.JPG (334.1 KiB) Viewed 2312 times

Aftermarket dust cover for the drives

14.JPG (315.93 KiB) Viewed 2312 times

System is fully stocked with add-on cards.

14a.jpg (182.24 KiB) Viewed 2312 times

15.JPG (583.99 KiB) Viewed 2312 times

16.JPG (679 KiB) Viewed 2312 times

Interestingly this pc has an AMD processor which runs at a whooping 5 mhz Apparently in 1982 the Intel 8088 CPU was selected for IBM PC computers on the condition that there will be a reliable second-source CPU manufacturer. This helped AMD to negotiate new license agreement with Intel, which gave AMD rights to x86 technology and allowed them to second-source 8086 and 8088 microprocessors. Also pictured is an Intel 8087-3 math co-processor.

17.JPG (557.05 KiB) Viewed 2312 times

18.JPG (771.78 KiB) Viewed 2312 times

Megalithic 41 MB hard drive

18a.JPG (441.18 KiB) Viewed 2312 times

I think the most interesting find of the lot is this fancy add-on card. At first I thought it was some kind of memory expansion card but it took me a while to figure out what this was. It is a DSI-020 coprocessor board that uses the 12.5-megahertz versions of the 68020 CPU and the 6888I FPU (floating-point unit). Basically a plug-in board that provides 32 bit computing power and math processing for 16 bit machines.
Full write up on this: http://www.retronik.fr/motorola/68K/680 ... oprocessor_[BYTE_1986_%2028p].pdf

19.JPG (1.44 MiB) Viewed 2312 times

20.JPG (1.03 MiB) Viewed 2312 times

22.JPG (1.09 MiB) Viewed 2312 times

23.JPG (503.47 KiB) Viewed 2312 times

Also comes with this AST memory expansion board.

24.JPG (873.9 KiB) Viewed 2312 times

[Daniel Beardsmore]

"COLOR GRAPHICS", from back when that was actually significant claim!

Also, Tai-Hao keycaps on a Costar keyboard … curious.

[Ir0n]

Your XT is way more decked out than mine.. I'm jealous.

I've thought about getting some of the newer ISA cards people are making for them just so I can use a some what modern monitor.

I can't find a IBM 5151 Display for mine. Lol

[JP!]

Your XT is way more decked out than mine.. I'm jealous.

I've thought about getting some of the newer ISA cards people are making for them just so I can use a some what modern monitor.

I can't find a IBM 5151 Display for mine. Lol

I hear ya there. A vga card and one of those compact flash cards would be nice.

[depletedvespene]

"… or if the drive experiences shocks in excess of 40 G's".

Forty.

How much of a shock are modern-day hard drives designed to withstand?

[Daniel Beardsmore]

My instinctive thought was 230 (from some spec I read once) — over 200, as I recall.

A very quick Internet search gives me, for 2004, 50–65 G operating, and 300+ G non-operating. I assume I had read the non-operating figure.