Re: [M100] Manual for the NEC PC-8300

2021-02-14 Thread Jeffrey Birt
I think that is where I found the 8201A service manual. The 8201A and 8300 differ quite a bit internally though. I did find a link just now on that site to another site which still has some NOS manuals in stock, so I sent them an email to check to see if they had one. Thanks, Jeff Birt

Re: [M100] Manual for the NEC PC-8300

2021-02-14 Thread John R. Hogerhuis
There is better technical documentation for the NEC's than there is for the 100. At least programming wise. The best documentation on the file system, for example, is in the NEC technical reference manuals. Go to https://www.web8201.net/ And look in the tech documents section. It says there's a

[M100] Manual for the NEC PC-8300

2021-02-14 Thread Jeffrey Birt
Hi all, I was tinkering with a PC-8300 this weekend and wishing I had something other than the PC-8201A manual (which is not really a great manual anyhow). Alas, I have searched and searched and not find anything other than a user’s manual and BASIC manual for the PC-8300. Has anyone every l

Re: [M100] Fw: New Knowledge to me.

2021-02-14 Thread Jeffrey Birt
These are old school unregulated DC supplies, just a transformer, rectifier and a capacitor. When unloaded the output voltage is higher and you have losses in the transformer itself, so you still get heat. With the supply loaded the voltage drops to the nominal rated voltage. They are a quite ineff

[M100] Fw: New Knowledge to me.

2021-02-14 Thread dano none
I didn't see Jeff Birt mention it, but he now has a new take down video of the stylish Olivetti M-10. https://www.youtube.com/watch?v=tq8DnnvOAy8 I left my Model-100 plugged in to an original Tandy transformer/power supply, it got a bit warm, so I said... Hum.. What happens if I unplug the tran