6885P5H
Experienced Member
I bought this Olivetti P500 from Italy. I was expecting the worst but it didn't arrive in that bad of a shape.. It's a 386SX Microchannel PC from 1989.
I believe development on it started in 1988, that's even the copyright date on the motherboard, but it was released in '89. There are a couple of things I find noteworthy about the P500. It was Olivetti's first Microchannel PC, it was the first PC to use the XP 2650/2670 chassis, and since it was the first to use the XP 2650/2670 chassis, it was also the first to have the famous square-type front control panel. The front control panel it uses is unique, you will only find it on the P500. Its layout is different than the later ones, and its iconography is that of older 80's PCs. Its cable is also different than the one used on later models.
One of the reason I wanted a P500 was to investigate the front control panel. Notice how there's a gap between the power LED and the reset button. Well I've disassembled it and sure enough there is space to put an hard disk activity LED. I don't know if a P500 with that space occupied was ever made as I have never seen one, but it appears that everything was ready for it in the case that it happened. This is how Olivetti chose this. When a computer didn't have an activity LED on the drive bay, they put in a front control panel with one. When a computer did have an activity LED on the drive bay, they put in a front control panel without one. All of the P500s I have seen had the activity LED on the drive bay, so that's why I have never seen a P500 front control panel with one.
Unfortunately I was told that the Imprimis 94216-106 hard disk is broken. It does not spin up, it does not emit a code, its a brick.
The P500 was succeeded in the early 90's by the M300-25 (P500/E).
Photos
https://i.ibb.co/hBGWYzN/DSC00166-min.jpg - Front. I still don't know what the "ITALIA" is for. The P500 was one of the last model to have an ITALIA variant, and it was the only one with a modern chassis to have one.
https://i.ibb.co/DCHZ3YY/DSC00167-min.jpg - Back. Notice the label...
https://i.ibb.co/WK44TCk/DSC00165-min.jpg - The front control panel, disassembled.
https://i.ibb.co/XyPQYG1/DSC00163-min.jpg - Motherboard. It uses the Intel 82310 chipset. All of the programmable circuits are socketed, except for the keyboard&mouse controller. If you tell me how to read them, I could share their content online. The reason I did not remove the disk controller is pretty funny. The plastic clip to hold cards inserted in that slot broke. The previous owner glued it back on but this removed any flexibility it had. I'll have to break the clip again when I want to remove the card.
https://i.ibb.co/Dknhdwg/DSC00164-min.jpg - Now this is mysterious. Is anyone familiar with this power supply? If you read the label on the back of the computer it says the PC will accept any mains electricity. However on the PSU I did not find any voltage selector switch. Is it automatic? To this day computer power supplies have a voltage switch, so why would this old one be automatic? And Olivetti always used crippled PSUs that only worked with one type of mains electricity. I think the P500 is the only old Olivetti PC I've seen with a label that says it will work with any voltage. So, is what the label says true? Is the PSU really automatic?
I believe development on it started in 1988, that's even the copyright date on the motherboard, but it was released in '89. There are a couple of things I find noteworthy about the P500. It was Olivetti's first Microchannel PC, it was the first PC to use the XP 2650/2670 chassis, and since it was the first to use the XP 2650/2670 chassis, it was also the first to have the famous square-type front control panel. The front control panel it uses is unique, you will only find it on the P500. Its layout is different than the later ones, and its iconography is that of older 80's PCs. Its cable is also different than the one used on later models.
One of the reason I wanted a P500 was to investigate the front control panel. Notice how there's a gap between the power LED and the reset button. Well I've disassembled it and sure enough there is space to put an hard disk activity LED. I don't know if a P500 with that space occupied was ever made as I have never seen one, but it appears that everything was ready for it in the case that it happened. This is how Olivetti chose this. When a computer didn't have an activity LED on the drive bay, they put in a front control panel with one. When a computer did have an activity LED on the drive bay, they put in a front control panel without one. All of the P500s I have seen had the activity LED on the drive bay, so that's why I have never seen a P500 front control panel with one.
Unfortunately I was told that the Imprimis 94216-106 hard disk is broken. It does not spin up, it does not emit a code, its a brick.
The P500 was succeeded in the early 90's by the M300-25 (P500/E).
Photos
https://i.ibb.co/hBGWYzN/DSC00166-min.jpg - Front. I still don't know what the "ITALIA" is for. The P500 was one of the last model to have an ITALIA variant, and it was the only one with a modern chassis to have one.
https://i.ibb.co/DCHZ3YY/DSC00167-min.jpg - Back. Notice the label...
https://i.ibb.co/WK44TCk/DSC00165-min.jpg - The front control panel, disassembled.
https://i.ibb.co/XyPQYG1/DSC00163-min.jpg - Motherboard. It uses the Intel 82310 chipset. All of the programmable circuits are socketed, except for the keyboard&mouse controller. If you tell me how to read them, I could share their content online. The reason I did not remove the disk controller is pretty funny. The plastic clip to hold cards inserted in that slot broke. The previous owner glued it back on but this removed any flexibility it had. I'll have to break the clip again when I want to remove the card.
https://i.ibb.co/Dknhdwg/DSC00164-min.jpg - Now this is mysterious. Is anyone familiar with this power supply? If you read the label on the back of the computer it says the PC will accept any mains electricity. However on the PSU I did not find any voltage selector switch. Is it automatic? To this day computer power supplies have a voltage switch, so why would this old one be automatic? And Olivetti always used crippled PSUs that only worked with one type of mains electricity. I think the P500 is the only old Olivetti PC I've seen with a label that says it will work with any voltage. So, is what the label says true? Is the PSU really automatic?