HP 9127A with 85/87



#6

Can the HP 9127A HP-IB 5.25" floppy drive be used with the HP-85/87 computers? Empirical evidence would suggest not...perhaps it uses a different command set. But if anyone knows for sure...


#7

You can find the manual here. I quickly browsed through it but I didn't found a reference to Series 80 computers. The 9127A uses the SS/80 protocol so my guess is that it might work. However, I would recommend a 3.5" floppy drive, they are much more convenient.


#8

I have a 9121 3.5" diskette drive, this one was just for...I dunno...completeness. Can't seem to get the 85/87 to "see" it, though. I have the manual for the drive and will check some more. With the drive address set to "4" and the computers at "7", I thought:

MASS STORAGE IS ":D704"

would let me use it. Nope...


#9

According to Series 80 Tips, drives using the Amigo protocol (like the 9121) should work with an HP-85. If you have an HP-85A you need the Mass Storage and I/O ROM. For drives using the SS/80 protocol (like the 9127A) you need the EMS ROM.

The device address 704 seems to be correct. Do you know if the drive and the HP-IB interface are working (i.e., did you use them successfully with other devices and other computers, respectively)?


#10

The 9121 works perfectly with both computers. In fact they can both be connected at the same time since the 87's "controller" switch is turned off.

I don't have the Extended Mass Storage ROM for the 87, though. (And there's no way to get the drive to work with an 85A, dang.)

If anyone out there has an EMS ROM for the 87, I have numerous other 87 ROMs, ROM drawers, BCD and serial interfaces, etc. that I'd be happy to trade.


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 85 Serial Interface; INPUT Example? inaki 1 176 06-12-2013, 11:09 PM
Last Post: Paul Berger (Canada)
  9815 data cartridge drive (also 9825 / 9845 / 85 / 87, and who knows what else) John Ioannidis 2 188 06-12-2013, 07:20 PM
Last Post: Craig Ruff
  HP 86/87 - CP/M Ph.Théry 3 172 05-27-2013, 04:02 AM
Last Post: Olivier De Smet
  Hp85 PRM-85 board Roe Peterson 2 177 12-08-2012, 12:00 PM
Last Post: Roe Peterson
  HP-85 Display Error on startup hogelmann 3 173 11-19-2012, 10:57 PM
Last Post: Paul Berger (Canada)
  HP-87 power supply repair philippe_elie 0 131 11-18-2012, 11:12 AM
Last Post: philippe_elie
  HP 85 for sale from german company cdtmbu 0 123 11-14-2012, 01:22 AM
Last Post: cdtmbu
  Looking for HP-87 service manual philippe_elie 2 178 11-08-2012, 02:07 AM
Last Post: philippe_elie
  HP 85 Tape. robertoataulfo 1 160 05-03-2012, 06:32 PM
Last Post: Katie Wasserman
  HP-85 Keyboard Repair aj04062 1 141 03-18-2012, 03:23 PM
Last Post: Paul Berger (Canada)

Forum Jump: