Re: Epson APL pinout?

[Tristan Mumford <xtristan.xmumford@xgmail.xcom>]

Hugh Hood wrote:

>   To: Tristan Mumford
> Tristan:
> 
> I have this scribbled down from the time I modified the card so that it
> would pass the high bit (#7) to my Laserjet Printer for the high ASCII box
> characters.
> 
> I don't have anything written down for Centronics pin #10 and later, which
> means I probably have an incomplete pinout. I'll look at this later, but
> this should get you started
> 
> 
> 
> Top of Header on Back of Card
> ----------------------
> A  C  E  G  I  K  M  O
> 
> 
> B  D  F  H  J  L  N  P
> ----------------------
> 
> 
> 
> 
> Centronics   Signal     Epson APL
> Pin #
> ---------------------------------
> 1           Strobe         M
> 2           Data Bit 0     K
> 3           Data Bit 1     J
> 4           Data Bit 2     I
> 5           Data Bit 3     H
> 6           Data Bit 4     G
> 7           Data Bit 5     F
> 8           Data Bit 6     E
> 9           Data Bit 7     D
> 10          Ack
> 
> 
> 
> BTW, if anyone has an Epson APL card and needs to pass the high bit, just
> cut the jumper wire located at JUMPER P4 on the card. It is just a short
> to ground for Data Bit 7.
> 
> I had heard of people modifying their Epson APLs to pass the high bit, but
> I never could find specific instructions. So, I took out the ohmmeter and
> traced it myself.
> 
> Hope this helps.

You bet it does! thanks for the tip on making it 8-bit too.

Please tell me this card has at least some bidirectionality. I have a few
parallel port applications it would be good for. Including:
* Parallel port sampler.
* Buffered D/A for pointless sound generating fun
* Printer
* T348 Parallel->SCSI adaptor.
* Various other things.

If it is still mostly unidirectional I can still use it for a few things :)
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