+acadiel Posted April 10, 2022 Share Posted April 10, 2022 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. 2 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 11, 2022 Author Share Posted April 11, 2022 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. 2 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 11, 2022 Author Share Posted April 11, 2022 Does anyone have the complete Impact Printer (PHP2500) manual, including Appendix D? I can't find a complete copy on the net. 1 Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted April 11, 2022 Share Posted April 11, 2022 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). 2 Quote Link to comment Share on other sites More sharing options...
blackbox Posted April 12, 2022 Share Posted April 12, 2022 (edited) 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 2 Quote Link to comment Share on other sites More sharing options...
blackbox Posted April 12, 2022 Share Posted April 12, 2022 (edited) 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 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 13, 2022 Author Share Posted April 13, 2022 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. Quote Link to comment Share on other sites More sharing options...
blackbox Posted April 13, 2022 Share Posted April 13, 2022 (edited) 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 1 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 13, 2022 Author Share Posted April 13, 2022 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 2 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 13, 2022 Author Share Posted April 13, 2022 Also, if someone can get me detailed pictures of the serial interface in the printer, please post them here. Also, this needs replaced. 1 Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted May 6, 2022 Share Posted May 6, 2022 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 3 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted May 31, 2022 Author Share Posted May 31, 2022 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 2 Quote Link to comment Share on other sites More sharing options...
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