TI Impact Printer Serial Card Dip switch settings

[+acadiel]

I can’t find these anywhere for the TI Impact Serial daughter card.  I can only find them for the ones built into the main printer for the Centronics interface (attached.)

 

Does anyone have the serial dip switch info?  Also, there’s a jumper that was resoldered on mine too, but I don’t have any docs about what it does.

 

 

[+acadiel]

If anyone finds the TI documentation for this serial card, I'd appreciate it if you put it on this thread (even if it's years in the future).

 

Also, just dumping this here.  Garrett Meirs gave me this link:

 

http://www.uktsupport.co.uk/epson/impact/8145.htm

 

The card is an 8145.  And @Ksarul, there's the IEE488 card that you mentioned.

 

[+acadiel]

Does anyone have the complete Impact Printer (PHP2500) manual, including Appendix D?  I can't find a complete copy on the net.

 

[+Ksarul]

After deep hunting, I found the part number for the EPSON serial board: 8155. Thay have a picture of one with the box at Computerhistory. No luck on where mine might be though. . .and they sold for about $190 each at the end of 1983 (price pulled from the 11-83 issue of ETI). This version apparently has a 4K buffer, which means it is a bit later then the 8145--but it may still maintain compatibility, based on their numbering schemes and the board itself (part number match).

[blackbox]

I have the full manual for the FX80 if it has anything of value.

Meanwhile- the serial board for the TI version is attached

Large jpg to download or a TXT file or a pdf- your choice!!!   -when viewing or printing the TXT file do use a monospaced font!

 

Ensure printer is disconnected from power and computer!

 

 

serialprinter.txt

serialprinter.pdf

Edited April 12, 2022 by blackbox
add pdf

[blackbox]

Hmm- the top photo does not look like the serial board TI fitted into their PHP2500. I can see an 8 switch but not a 4 switch, but I may be missing something.

As supplied both boards  (control and serial) should have both a 4 and 8 dip switch set.

 

 

- see attached sketch showing the dip switch positions for the serial board.   Could the board be a dealer-fitted Epson board fitted to adapt a standard Epson printer rather than the TI Printer which was sold with both serial and parallel as default?

See attached which is the "official" layout of the PHP2500 serial board which was fitted on top of the control board. There is a ground line connected at bottom right..


 

Edited April 12, 2022 by blackbox

[+acadiel]

13 hours ago, blackbox said:

Hmm- the top photo does not look like the serial board TI fitted into their PHP2500. I can see an 8 switch but not a 4 switch, but I may be missing something.

As supplied both boards  (control and serial) should have both a 4 and 8 dip switch set.

 

 

- see attached sketch showing the dip switch positions for the serial board.   Could the board be a dealer-fitted Epson board fitted to adapt a standard Epson printer rather than the TI Printer which was sold with both serial and parallel as default?

See attached which is the "official" layout of the PHP2500 serial board which was fitted on top of the control board. There is a ground line connected at bottom right..


 

Strange… well, it came with the printer, but wasn’t installed.  If anyone has a serial one that they’re not using, please let me know - I’d like go get the serial interface up and working.

 

I still can’t figure out this other one…. But will keep working on it.

 

 

[blackbox]

Most interesting- especially if the printer is badged as TI. The TI PHP2500 was sold for the standalone RS232 PHP1700- which did not have a parallel port, so TI had to sell PHP2500 with the serial port ready installed- resulting in a printer with both serial and parallel sockets.
See attached image of the rear of the printer PHP2500, showing the added serial socket in a rather ad hoc cut out, also showing the Texas Instruments label on the back. The printer started as an Epson MX80 but TI modified it.
If you look at the right hand side of the serial port in this image, you can see the ground cable leading downwards.
When the PEB came out the RS232 card supported PIO which was the standard Epson printer interface,
For a little while Epson dealers could supply a serial conversion kit for anyone who needed one (for any computer)- this may be what you have, and it seems to be rather different to the one TI had fitted into their PHP2500.
In your printer is there room for a serial board to be added above the control board with four corner screws? If the printer is badged TI perhaps the TI  serial board failed- or was not fitted for some reason.
I don't think the PHP2500 manual is going to help with this one- you need the documentation for that particular Epson Serial Interface card, which is not the TI one...

Edited April 13, 2022 by blackbox

[+acadiel]

Yep, it has the space. So it must have been removed.

 

Note, these ROMs appear to have been upgraded.  Probably the Graftrax plus ROMs.

Graftrax-80_1981_Epson.pdf

[+acadiel]

Also, if someone can get me detailed pictures of the serial interface in the printer, please post them here.

 

Also, this needs replaced.

 

[+Ksarul]

I have continued hunting here, and I have finally found the settings for the exact board pictured by @acadiel. It even specifies the default settings for the wire links scattered all over the board, so we can compare them to the settings TI used. The part number for this board is NOT an 8145, as we all thought, but an 8143. Here is the link to a site with the data--just scroll down the page and find lots of EPSON setting goodness. I copied this here for posterity, just in case the other site ever disappears, as it is the only place I have ever seen that documented this card.

 

EPSON, INC.

NEW SERIAL INTERFACE #8143

 

Card Type	Serial interface card
Chipset/Controller	Unidentified
I/O Options	Serial interface
Maximum DRAM	N/A

 

 

 

CONNECTIONS
Purpose	Location
Serial Interface	CN1

 

 

HANDSHAKING PROTOCOL
Function	J1	J2	J3	J4	J5
Pull up "TTY-TXD" to +12V via 470 W	On	Off	Off	Off	Off
Connect : "TTY-TXD Return" to Signal Ground	Off	On	Off	On	Off
Pull up "TTY-RCD" to +12V via 470 W	Off	Off	On	Off	Off
Pull up "DSR" and "DCD" to +12V via 4.7k W	Off	Off	Off	Off	On
Note:The factory default setting for J1, J2, J3, and J4 is Off. The factory default setting for J5 is on.

 

 

DTR PROTOCOL
Signal		JNOR	JREV
»	DTR=MARK (RS232), TTY-TTD = MARK (current loop)	On	Off
	DTR=SPACE (RS232), TTY-TXD = SPACE (current loop)	Off	On
Note:MARK = logic "1" (-3 to -27V), SPACE = logic "0" (+3 to +27V) for RS232C For Current loop, MARK = logic "1" (current on), SPACE = logic "0" (current Off).

 

 

INPUT DATA CONFIGURATION
Data		JC	JRS
»	RS232 level	Off	On
	Current loop level	On	Off

 

 

OUTPUT DATA CONFIGURATION
Output		JF	JX
»	Reverse channel flag to TTY-TXD (current loop)	Off	On
	X-On/X-Off signal to TTY-TXD (current loop)	On	Off

 

 

DATA BIT SELECTION
Data Bit		SW1/2
»	7	On
	8	Off

 

 

PARITY CONFIGURATION
Setting		Parity check	SW1/5	SW1/6
»	Enabled	Even	On	On
	Disabled	Odd	Off	Off

 

 

INTERFACE SELECTION
Interface		SW1/8
»	Serial interface is valid	On
	Parallel interface is valid	Off

 

 

BIT RATE SELECTION
Bit rate	SW1/1	SW1/3	SW1/4	SW1/7
75	On	On	On	On
110	On	Off	On	On
134.5	On	On	Off	On
150	On	Off	Off	On
200	Off	On	On	On
300	Off	Off	On	On
600	Off	On	Off	On
1200	Off	Off	Off	On
1800	On	On	On	Off
2400	On	Off	On	Off
4800	On	On	Off	Off
9600	On	Off	Off	Off
19200	Off	On	On	Off
19200	Off	Off	On	Off
19200	Off	On	Off	Off
19200	Off	Off	Off	Off

 

 

[+acadiel]

Per Ksarul, here’s where the original info is on the 8143 card. Go to page 146 and 147 here: http://www.bitsavers.org/pdf/epson/printer/Y502999010-A_SQ-850-2550_Technical_Manual_1990-11.pdf