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On Friday I received this nice thing, courtesy of rfka01 .
It was somewhat tricky to acces the inside parts but I managed to enter without breaking anything.
Not much different from a P2 system.
About those two...
I'm a bit disappointed. I expected TA to build a 64K board and not having the same 48K+16K structure.
This one took me for surprise. At first I thought that an EPROM was missing, but seems that the P3 has 4K ROM, isn't it?
After a first check ( rfka01 told me that the unit is non-functional) I found an issue at the floppy controller board.
That blue capacitor (C21) located near the FD1791B was dead and if I had turned the computer on I would have had a short circuit in the 12V line. I've also checked all four fuses and found no more failures. I replaced the capacitor about three hours ago. I'll clean and test it during this week.
The keyboard... yeah... so heavy that it could be used as a melee weapon. It seems that was made to last long (and also for IT to kill their bosses too).
Welcome in the TA P3 owner's round! Actually there are different versions of the boards inside. My system is equipped with a 64KB RAM card. But I can confirm that the CPU board just has a single 4KB EPROM. I believe that they just needed 4KB as the TA P3 doesn't come with the full MOS, many features known from the P2 are not there. The P3 was always meant to be a CP/M machine, there is also no Basic boot disk as far as I know.
In my machine there were two defects: Broken power supply and defective CRT chip on the video+keyboard controller card. After repairing these issues my P3 is working perfectly again.
Thank you, gpospi .
Yes, I remembered yesterday that you got it in a single card. Looks cool. I think you may be able to help me a little, we'll talk later in another thread.
This night I also found that I was wrong about the memory cards being the same as in the P2. There is a slight difference I have realized this morning that allowed a major redesign in the computer.
Today I will run its first test.