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SteveH
November 8th, 2009, 02:49 PM
I recently picked up an old NEC APC (Advanced Personal Computer) in very poor condition; badly damaged casing, power cord cut off, no keyboard and no OS disks (apparently it can run CP/M-86 and MS-DOS). I've fitted a new power PSU cord and repaired some video wiring that was chewed through by mice.

Well... it now powers up... sort of.

The fan turns, LED D5 lights up on the CPU board and the CRT displays
in the upper left corner. However, there's no sound form the speaker and the drives don't spin when closed.

I wonder if
being displayed or LED D5 being lit is the system complaining about the lack of keyboard. Anyone know?


In the mean time, here's some pictures:

This is what it should look like:
http://oldcomputers.net/pics/nec-apc-right.jpg
(picture from http://oldcomputers.net)


This is what it does look like

Badly damaged casing:
http://www.eolith.co.uk/NECAPC/NEC_APC_Case2.JPG

http://www.eolith.co.uk/NECAPC/NEC_APC_Case3.JPG

http://www.eolith.co.uk/NECAPC/NEC_APC_Case5.JPG

The casing, cards and drives removed:
http://www.eolith.co.uk/NECAPC/NEC_APC_Cards_&_Drives_Removed.JPG

One of the NEC FD1165-A drives (in situ but not screwed down):
http://www.eolith.co.uk/NECAPC/NEC_APC_FD1165-A.JPG

Here's the 8086 processor card G9FPB2, serial number 136-452290-B-2. It has edge connectors for ODA and KBD. Most notable ICs on this board are the D8086D CPU, 8237 DMA, 8253 PIT, 8255 PPI, 8259 PIC, 2732 EPROMS and a 4 x 4 bank of 4164 RAM. There's also a 14.7456 MHz crystal.
http://www.eolith.co.uk/NECAPC/NEC_APC_G9FPB2.JPG

Here's graphics card G9PTS, serial number 136-451866-D-4. It has edge connectors for CRT and GDG (GDG connects to the next card which also has a graphics processor). The main ICs on this board are the D7220D-1 NEC high performance graphics controller and a 8 x 8 bank of 4864 RAM.
http://www.eolith.co.uk/NECAPC/NEC_APC_G9PTS.JPG


And finally, here's graphics/floppy disk drive card G9PFCU, serial number 136-452120-B-3. It has edge connectors for FDC, GDG and M/D (GDG connects to the other graphics card). The main ICs on this board are a D7220D-1 NEC high performance graphics controller and a D765AC floppy controller (note: a google search also shows D765AC as a NEC CRT controller - so it could be either as this board handles graphics and the floppy drives).
http://www.eolith.co.uk/NECAPC/NEC_APC_G9PFCU.JPG

tezza
November 8th, 2009, 02:56 PM
That old beast has certainly seen a bit of life.

I can't help you much with the problem but it would be cool to have one of these. It was voted "Australian Computer of the Year" in 1982 (see http://www.classic-computers.org.nz/bits-and-bytes/issue2.2.htm)

Tez

Chuck(G)
November 8th, 2009, 04:28 PM
NEC had two series of x86 machines during the 1980's--one for personal use (PC9801) and the other for business use (N5200). Yours is essentially an early N5200, which series grew to include commercial laptops. Internally, the two series are very similar.

The curious thing about the NEC systems was that the diskette format stayed the same, regardless of physical size--basically 8 sectors of 1024 bytes per track, two tracks per cylinder. The 5.25" and 3.5" versions were exactly the same, right down to the rotational speed, 360 RPM.

Both the N5200 and the PC9801 run MS-DOS, but it's not the same DOS as used in the rest of the world, as the NEC boxes are very different from IBM-type PCs internally (not just I/O ports, but BIOS interface is very different).

While the IBM PC was essentially an open architecture, the PC9801/N5200 was a closed one, so technical information is pretty much catch-as-catch-can, though some has been worked out.

Edit: There are a bunch of games that are PC98-specific and keep the emulator folks busy. Here's a fellow who ported the Neko project emulator to an iPod Touch (http://gadgets.boingboing.net/2007/10/23/pc9801-emulator-for.html)

nige the hippy
November 11th, 2009, 01:55 AM
hey there's 2 just come up on epay! I suspect as one is boxed and beautiful, the other seems to be a bit like yours though!
pickup only in Andover.

SteveH
November 11th, 2009, 10:33 AM
hey there's 2 just come up on epay!I've emailed the seller asking if he'd be willing to sell copies of the docs + disks. Worst case - he says no.

SteveH
November 11th, 2009, 10:37 AM
It was voted "Australian Computer of the Year" in 1982 (see http://www.classic-computers.org.nz/bits-and-bytes/issue2.2.htm) Interesting read. The computer mags back then were certainly more interesting/varied, what with all the different makes and models of computers available.

ocateu
December 1st, 2009, 01:59 PM
I recently picked up an old NEC APC (Advanced Personal Computer) in very poor condition; badly damaged casing, power cord cut off, no keyboard and no OS disks (apparently it can run CP/M-86 and MS-DOS). I've fitted a new power PSU cord and repaired some video wiring that was chewed through by mice.

Well... it now powers up... sort of.

The fan turns, LED D5 lights up on the CPU board and the CRT displays
in the upper left corner. However, there's no sound form the speaker and the drives don't spin when closed.

I wonder if
being displayed or LED D5 being lit is the system complaining about the lack of keyboard. Anyone know?


In the mean time, here's some pictures:

This is what it should look like:
http://oldcomputers.net/pics/nec-apc-right.jpg
(picture from http://oldcomputers.net)


This is what it does look like

Badly damaged casing:
http://www.eolith.co.uk/NECAPC/NEC_APC_Case2.JPG

http://www.eolith.co.uk/NECAPC/NEC_APC_Case3.JPG

http://www.eolith.co.uk/NECAPC/NEC_APC_Case5.JPG

The casing, cards and drives removed:
http://www.eolith.co.uk/NECAPC/NEC_APC_Cards_&_Drives_Removed.JPG

One of the NEC FD1165-A drives (in situ but not screwed down):
http://www.eolith.co.uk/NECAPC/NEC_APC_FD1165-A.JPG

Here's the 8086 processor card G9FPB2, serial number 136-452290-B-2. It has edge connectors for ODA and KBD. Most notable ICs on this board are the D8086D CPU, 8237 DMA, 8253 PIT, 8255 PPI, 8259 PIC, 2732 EPROMS and a 4 x 4 bank of 4164 RAM. There's also a 14.7456 MHz crystal.
http://www.eolith.co.uk/NECAPC/NEC_APC_G9FPB2.JPG

Here's graphics card G9PTS, serial number 136-451866-D-4. It has edge connectors for CRT and GDG (GDG connects to the next card which also has a graphics processor). The main ICs on this board are the D7220D-1 NEC high performance graphics controller and a 8 x 8 bank of 4864 RAM.
http://www.eolith.co.uk/NECAPC/NEC_APC_G9PTS.JPG


And finally, here's graphics/floppy disk drive card G9PFCU, serial number 136-452120-B-3. It has edge connectors for FDC, GDG and M/D (GDG connects to the other graphics card). The main ICs on this board are a D7220D-1 NEC high performance graphics controller and a D765AC floppy controller (note: a google search also shows D765AC as a NEC CRT controller - so it could be either as this board handles graphics and the floppy drives).
http://www.eolith.co.uk/NECAPC/NEC_APC_G9PFCU.JPG


Very Impressive heavy workout!



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NathanAllan
December 2nd, 2009, 01:17 AM
Seems that seller is asking a lot for his unit. Pity he said no to the disks and things. She certainly has seen better days, hate to see a machine end up like that one. :(

canyonman
January 23rd, 2016, 12:35 AM
I've got a color NEC APC, in near-perfect condition, stored in original boxes since 1985. All the original software and documentation, including full schematics. Just listed on eBay with a reserve price of only $25.

I just want to find a good home for this rare workstation!

Tor
January 23rd, 2016, 02:22 AM
Looks superb. And lots of docu. Hopefully the right person finds it. I would bid, but shipping seems to be over $1200 to here so it can never be.

-Tor

SomeGuy
January 23rd, 2016, 04:51 AM
No link to the ebay listing?

This looks like it: http://www.ebay.com/itm/NEC-APC-Advanced-Personal-Computer-graphics-workstation-Excellent-Condition-/182000313246?hash=item2a6010639e:g:34kAAOSwqYBWott L#ht_734wt_0

You might want a seperate thread in the items for sale forum.

At any rate, that looks in awesome condition, and that is a great collection of software!

Al Kossow
January 23rd, 2016, 07:47 AM
I've emailed the seller asking if he'd be willing to sell copies of the docs + disks. Worst case - he says no.

The docs and software are on bitsavers

new_castle_j
January 23rd, 2016, 08:14 AM
That's a wayyy coool machine, it ran TurboDOS too!!!

SteveH
January 23rd, 2016, 09:23 AM
The docs and software are on bitsavers

Nice one Al, Cheers. Now I've got all the docs, I've got no excuse not to get this beast up an running. I did purchase a NOS boxed APC-H25 keyboard from another member here a while back, but when the PSU started blowing magic smoke, it was put to the back of the to-do list.

SteveH
January 23rd, 2016, 09:34 AM
Well, I've just taken a quick look at the APC System Reference Guide and I'm certainly impressed :cool:. Not only has it got the schematics, but the main hardware circuits are described in detail together with memory and I/O ports plus expected values are all listed. It also includes data sheets for most of the larger chips.