I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM chips, a backplane with 8 (not 7) card connectors, arrows drawn between the connectors, rows labeled A- K from
bottom up, a 2N3904 transistor next to the Color Trim Cap, but no prototyping area. I think it may be a replica. Any thoughts?

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All Apple II/II+ motherboards had 8 slots.
Some did have prototyping areas but most didn’t.
Everything sounds like a II/II+.
To the left of the ROM chips there should be the motherboard revision. Should be something like 320-0044-D or 320-0001-07 or a dozen others.
A pic would aid greatly

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Thomas Kotowski wrote:

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with
1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM chips, a backplane with 8 (not 7) card connectors

8 slots is OK, as the II and II Plus had slots numbered 0 to 7. But wow, I wonder what the memory map is like with 16K of ROM.

The standard II and II Plus motherboard only had 6 ROM slots for 12K total
ROM.

--
]DF$
The New Apple II User's Guide:
https://macgui.com/newa2guide/

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On Wednesday, August 2, 2023 at 5:39:31 PM UTC-4, D Finnigan wrote:

Thomas Kotowski wrote:

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with
1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM chips, a backplane with 8 (not 7) card connectors

8 slots is OK, as the II and II Plus had slots numbered 0 to 7. But wow, I wonder what the memory map is like with 16K of ROM.

The standard II and II Plus motherboard only had 6 ROM slots for 12K total ROM.

--
]DF$
The New Apple II User's Guide:
https://macgui.com/newa2guide/

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On Wednesday, August 2, 2023 at 5:39:31 PM UTC-4, D Finnigan wrote:

Thomas Kotowski wrote:

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with
1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM chips, a backplane with 8 (not 7) card connectors

8 slots is OK, as the II and II Plus had slots numbered 0 to 7. But wow, I wonder what the memory map is like with 16K of ROM.

The standard II and II Plus motherboard only had 6 ROM slots for 12K total ROM.

--
]DF$
The New Apple II User's Guide:
https://macgui.com/newa2guide/

Correction: This card has 6 and not 8 ROM chips.

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On 8/2/23 6:11 PM, Thomas Kotowski wrote:

On Wednesday, August 2, 2023 at 5:39:31 PM UTC-4, D Finnigan wrote:

Thomas Kotowski wrote:

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with
1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM chips, a
backplane with 8 (not 7) card connectors

8 slots is OK, as the II and II Plus had slots numbered 0 to 7. But wow, I >> wonder what the memory map is like with 16K of ROM.

The standard II and II Plus motherboard only had 6 ROM slots for 12K total >> ROM.

--
]DF$
The New Apple II User's Guide:
https://macgui.com/newa2guide/

Correction: This card has 6 and not 8 ROM chips.

That was the only thing that was odd - 6 ROM sockets is normal for a
II/II+. Pics or it didn't happen.

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Groovy hepcat Thomas Kotowski was jivin' in comp.sys.apple2 on Thu, 3
Aug 2023 04:17 am. It's a cool scene! Dig it.

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM
chips, a backplane with 8 (not 7) card connectors, arrows drawn
between the connectors, rows labeled A- K from bottom up, a 2N3904
transistor next to the Color Trim Cap, but no prototyping area. I
think it may be a replica. Any thoughts?

Sounds like an original Apple II or II+ motherboard. I haven't seen
one of these "in the flesh", only in pictures, so I'm not sure whether
that's what you have there. But it certainly sounds like one of these.
The Apple II came out in '77, and I think the II+ came out in '78, so
this is likely a II+.

--


----- Dig the NEW and IMPROVED news sig!! -----


-------------- Shaggy was here! ---------------
Ain't I'm a dawg!!

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On Thursday, August 3, 2023 at 10:07:42 AM UTC-4, Peter 'Shaggy' Haywood wrote:

Groovy hepcat Thomas Kotowski was jivin' in comp.sys.apple2 on Thu, 3
Aug 2023 04:17 am. It's a cool scene! Dig it.

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM
chips, a backplane with 8 (not 7) card connectors, arrows drawn
between the connectors, rows labeled A- K from bottom up, a 2N3904 transistor next to the Color Trim Cap, but no prototyping area. I
think it may be a replica. Any thoughts?

Sounds like an original Apple II or II+ motherboard. I haven't seen
one of these "in the flesh", only in pictures, so I'm not sure whether that's what you have there. But it certainly sounds like one of these.
The Apple II came out in '77, and I think the II+ came out in '78, so
this is likely a II+.

--

----- Dig the NEW and IMPROVED news sig!! -----

-------------- Shaggy was here! ---------------
Ain't I'm a dawg!!

Does it have memory configuration jumper blocks on the left side at the end of each row of RAM chips? If so it is likely a II. The ||+ did away with the jumper blocks and hardwired them for 16K RAM chips. Some of the early ||+ machines continued to use
the older revision mother board with the blocks. The ||+ came with 16, 32, or 48K RAM for this reason while the II could have any combination of 4K and 16K rows. It had to do with the price of one 16K chip dropping in price to below what 4 4K chips would
cost about the time the + came out.

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Gordon Aplin <gordon.aplin@gmail.com> wrote:

On Thursday, August 3, 2023 at 10:07:42 AM UTC-4, Peter 'Shaggy' Haywood wrote:

Groovy hepcat Thomas Kotowski was jivin' in comp.sys.apple2 on Thu, 3
Aug 2023 04:17 am. It's a cool scene! Dig it.

I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, >>> with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM
chips, a backplane with 8 (not 7) card connectors, arrows drawn
between the connectors, rows labeled A- K from bottom up, a 2N3904
transistor next to the Color Trim Cap, but no prototyping area. I
think it may be a replica. Any thoughts?

Sounds like an original Apple II or II+ motherboard. I haven't seen
one of these "in the flesh", only in pictures, so I'm not sure whether
that's what you have there. But it certainly sounds like one of these.
The Apple II came out in '77, and I think the II+ came out in '78, so
this is likely a II+.

--


----- Dig the NEW and IMPROVED news sig!! -----


-------------- Shaggy was here! ---------------
Ain't I'm a dawg!!

Does it have memory configuration jumper blocks on the left side at the
end of each row of RAM chips? If so it is likely a II. The ||+ did away
with the jumper blocks and hardwired them for 16K RAM chips. Some of the early ||+ machines continued to use the older revision mother board with
the blocks. The ||+ came with 16, 32, or 48K RAM for this reason while
the II could have any combination of 4K and 16K rows. It had to do with
the price of one 16K chip dropping in price to below what 4 4K chips
would cost about the time the + came out.

Also, all Apple II’s and II+’s had SIX ROM sockets, not eight. Clones imitated a lot, but I never saw one with a (counterfeit) Apple logo/label.

--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com

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