Re: Connector P2 on 2040/4040 mainboard?

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Tue, 18 Jun 2019 15:27:34 -0400 Message-ID: <9A62EB7F8BFE4A05832DE3EE240C53F5_at_310e2> · mhs.stein_at_gmail.com

----- Original Message ----- 
From: "Ethan Dicks" <ethan.dicks_at_gmail.com>
To: <cbm-hackers_at_musoftware.de>
Sent: Tuesday, June 18, 2019 1:55 PM
Subject: Re: Connector P2 on 2040/4040 mainboard?

On Tue, Jun 18, 2019 at 12:35 PM André Fachat <afachat_at_gmx.de> wrote:
> I did some worl on these drives recently...
>
> I THINK you can just use the 8250 board as reference. It is a universal
> digital board and is supposed to be jumperable to 4040 mode.

Hi, Andre,

Good point.  Thanks for mentioning this.  I'll check those pages in a bit.
==================

8050 board also looks the same (note non-standard pin numbers!):

1 ODD HEAD
2 HD SEL 1
3 MTR0*
4 WP0
5 ACT LED 0
6 WP1
7 MTR1*
8 ACT LED 1
9 SIB
10 GND
11 GND
12 HD SEL 0
13 WRITE ENABLE
14 DATA OUT
15 DATA IN
16 RD INHIBIT
17 SOA
18 SOB
19 SIA
20 GND

m