ZXnet

HP 9000/360

Introduced alongside the 9000/370 in 1988, this is one of the later series 300 machines. It features a 25MHz Motorola 68030 CPU with 4MB of RAM on the CPU card, upgradable to 8, 12 or 16MB of RAM with a daughterboard that attaches to the CPU card.

The CPU card itself (including any memory daughterboard) occupies only one of the four DIO-II slots available in the chassis and has no I/O itself.

A minimal set of I/O is normally provided by a System Interface or Human Interface Card which occupies the second DIO-II slot. My machine has a 98562-56533 which has:

• 10base2 LAN
• DE9F RS-232
• RCA Speaker
• HP-HIL
• HP-IB
• High-speed HP-IB on a daughterboard with attached cable

Serial Console

If the machine doesn't have a graphics card (or it does, but you don't want to use it), you can instead use a serial console. In order to do this, you need to set the REM switch on the HPIB/RS232 switch block on the System Interface/Human Interface card to ON.

For connecting your PC running a terminal emulator to the RS-232 port on this card, just use a normal straight-through serial cable. A null-modem cable is not required and will not work.

Other Notes

• If the computer has been operated in a dusty environment, a significant amount of dust can accumulate on the backplane and the parts of the cards and power supply closest to the fans. When left for a long time, dust can combine with humidity to result in rust.
• Cards may contain glass tantalum capacitors that look kind of like diodes. Like the normal kind of tantalum capacitors, these can fail short. But instead of making smoke and fire, they just pop and leave behind glass fragments.
• To remove the top cover, undo the two captive screws above the power supply and remove the power supply cover. The top cover should then slide backwards and up. If an expander chassis is attached, you'll need to remove that first and then undo the remaining screw on the bracket that the expander chassis mounts to.
• To remove the power supply, undo the two captive screws and take off the power supply cover. Then undo the single screw in the bottom of the power supply area and pull firmly on the plastic ring to slide the PSU out of the back of the case.