How do i get the EII library from my PC into a MAC SE30?

[lennox]

Where are you located Lennox?

thanks dr.C i will try to check everything

@JMP

i'm located in Holland living near Amsterdam

[lennox]

My first Emulator II's RS422 also didn't work after I bought it.
Mine is a Rev 0 machine, so it had the additional board to add RS422 support instead of the original RS232.
This board is also based on the 26LS31 driver chip and 26LS32 receiver chip.

The problem was solved by replacing the driver (26LS31). This is a commonly available IC and it's very cheap.
My tech guy said that both ICs are not protected for electrostatic pulses on the DB25 connector's pins, so they can fail easily.

Just for your information, and for what it's worth: at that time I compared voltages on the DB25 connector pins between my bad EII and a good working EII. Here are the voltages of the GOOD working port (these are simple DC voltage measurements done with a multimeter)

* Measurement when EII is connected to the Mac (but not transferring data):
  - pin 11 (TXD+): +4.0 V
  - pin  3 (TXD-): +0.15 V
  - pin 10 (RXD+) +4.20 V
  - pin  2 (RXD-): -4.20 V
  (FYI: the BAD EII gave +0.12 V on pin 11 and +3.91 V on pin 3 - the other voltages where the same)
 
* Measurement when EII is not connected to the Mac:
  - pin 11 (TXD+): +4.5 V
  - pin  3 (TXD-): +0.15 V
  - pin 10 (RXD+) +3.50 V
  - pin  2 (RXD-): +1.40 V

I hope this helps.

///E-Synthesist

i did some measurements according to my emu db25 connector i get other measurments, these are with the new ic's installed and the emu not connect to the MAC

all are +

pin1 = 1.26
pin2 = 3.27
pin3 = 3.26
pin4 = 3.33
pin5 = 0.27
pin7 = 0.28
pin8 = 3.24
pin11 = 0.50
pin12 = 0.80
pin13 = 0.28
pin20 = 1.26

all the other pins not mentioned have 0.00

I swapped the old ic's back in and they differnot that much, the highest voltage is 3.33 the lowest 0.28

looking at your table there must be something wrong with mine 

[lennox]

wait a minute i think i mirrored the pin voltages

these measurements were done looking straight at the DB25 connector on the back of the EMU and measuring from left to right..

so it should be according to Esynthesist tabel

* Measurement when EII is not connected to the Mac:
  - pin 11 (TXD+): +4.5 V
  - pin  3 (TXD-): +0.15 V
  - pin 10 (RXD+) +3.50 V
  - pin  2 (RXD-): +1.40 V


My EMU gives the following measurements:

 Measurement when EII is not connected to the Mac:
  - pin 11 (TXD+): +3.27 V
  - pin  3 (TXD-): +0.50 V
  - pin 10 (RXD+) +3.26 V
  - pin  2 (RXD-): +0.80 V

Hmmm... could it be that the new IC's are wrong??   i mean can i measure the pins on the IC itself?


Update: i ordered new IC's wich were mentioned in a txt file for making a RSS422 digital board

*1x AM26LS32PC (quad line receiver IC)  "IC2"
*1x AM26LS31PC (quad line driver IC)  "IC1"

let's hope and pray these guys do the job

[dr.c]

Lets hope....

[lennox]

got the new ic's today, installed them and still nothing    i've read somewhere that some rev 1 boards still need some kind of modification. Something to do with bending a pin on one of the ic's.

I'm going to look into it tomorrow, i'm gono cry myself to sleep now

any ideas or tips are appreciated, i feel so close to the solution...

[JMP]

I think the document you may be referring to is here, titled SD for EII troubleshooting (top right corner):

http://www.emulatorarchive.com/Archives/Samplers/E2Overview/E2SD/e2sd.html  

[lennox]

I think the document you may be referring to is here, titled SD for EII troubleshooting (top right corner):

http://www.emulatorarchive.com/Archives/Samplers/E2Overview/E2SD/e2sd.html  

thx JMP

i tried the pin bend but still no luck. I stopped further experimenting because i feel that my EII is already configured OK.

I use a MAC SE30 with 7.1 OS, 8 MB mem and 20MB HD, scsi zip, should or could it have something to do with the Memory cache settings?

Could someone measure his DB25 pin voltages when not connecting to a MAC and also the pin voltages when only the 8 din is connected and the DB25 not (but ofcourse powerd up) so i can close things out, is it the EII or the MAC

THANKS in advance

[lennox]

oh and i found some technical stuff on how to make your own RS422 board. The parts mentioned (about 10) are already in mine. Should i search for any broken parts here or is it possible to bypass my RS422 and make a new RS422 board?

[JMP]

Have you tried a different Mac or tested that cable yet? That would be my next course of action before I did anything more to the EII itself.   

[dr.c]

I use a MAC SE30 with 7.1 OS, 8 MB mem and 20MB HD, scsi zip, should or could it have something to do with the

7.1 !!!!!!!  Use 6.5 !!!!!!

[Elmbeatz]

I use a MAC SE30 with 7.1 OS, 8 MB mem and 20MB HD, scsi zip, should or could it have something to do with the

7.1 !!!!!!!  Use 6.5 !!!!!!

YES MAN!!! Do what the doctor says!! NOW! 

[esynthesist]

7.1 !!!!!!!  Use 6.5 !!!!!!

My Mac Classic is running 7.5.3 and it works just fine with the EII.
My Mac SE/30 however is running 6.1, which also works, but I haven't tried OS 7 on the SE with my EII yet.
I have some more vintage Macs here (I bought a whole batch), if I don't know what to do anymore I might boot them and check their OS and whether they are compatible with the EII.

Anyway, before even downgrading your SE OS, I would really recommend to test with another Mac first.
Because installing another OS on a Mac is not a pleasure (I did it once, I still have a confused Mac Powerbook  )

///E-Synthesist

[lennox]

THX guys,

i will indeed try another mac, i got my eye on 2 mac one classic the other a classic II in my neigborhood, hope to get them tomorrow

i will let you know the results

[lennox]

got the other MAC's yesterday evening, it was getting late i tried only once with one of the two and gave a "Cant communicate with EII" window    i have to look into it closer keeping in mind that my EII has a faulty RS422.

I saw something about better data integrity by soldering a resistor somewhere, about getting +5v

going to look into that too, i'm not giving up 

[lennox]

no luck with the other macs as well 

maybe the cable is not working right, should the connector be a little loose on the EII?  because i cannot screw the connector on with the two screws

Or indeed my EII needs to be checked in the RS422 circuit