Recent content by ThisPostContainsComputers

There are a couple of V9958 listings on Ali for $8-10 a piece. As far as I can tell, these are all fake. I bought one about a month ago out of curiosity and it was obviously remarked and in the wrong package. The dead giveaway for fake V99X8 chips is the lack of indentation by pin 1. Maybe the...

I did a bit of experimentation with dynamically allocating space in the "swap stack" for the non-BGOPTION kernel. Turns out the modifications were not as trivial as initially expected, but after a bit of trial and error I got it working properly. Here is a demonstration of a recursive shell...

Technically allocating is based on process id as well. It just ends up acting like a stack because there can only ever be one active process at once (without BGOPTION, that is).

Swap works a little differently in LSX than it does in normal UNIX V6. Essentially, swap space is broken up into a number of "slots" that are the size of user space. While the amount of data actually written to the slot during a swap operation is dynamic, the occupied space on disk never...

Make sure that the configuration in header.s matches what is found is param.h. If I recall correctly the default configuration in header.s is a non-LSI (i.e. 11/05) with no EIS support. Additionally, for some reason the default source has line 576 of mch.s as "_u = 47000". This is only correct...

It should be perfectly possible to run this on the PDT 11/150, assuming you're ready to get knee-deep in 70s-era UNIX code. I did a bit of hacking with LSX a few years back. It's 95% stock V6 source code, so modifying it is surprisingly easy. I was able to get LSX to support: Full use of...

I didn't notice any capacitor leaking in the PSU or analog board, but that doesn't mean that the capacitors are OK either. The biggest point of concern I noticed is that the +15V rail that goes into the monitor is up around ~18-19 volts. It is pretty consistent at this voltage, and does not...

Hello, Since VCFMW is coming up in a few short weeks, I've been spending a decent amount of time getting my hardware in order. One such piece of hardware is my Otrona Attache CP/M luggable. For the most part, it works perfectly fine. Keyboard, PSU, CPU, floppy drives, etc... all seem to work...

Hello, I have spent the last couple of months messing around with CP/M internals. I feel like a have a pretty good grasp on how file I/O works, except for one certain situation. Most user programs don't use it, but the CCP does when it processes SUBMIT files. It goes a little like this: The...

I took a look at the logs you posted in your ticket and compared it to a normal interaction. Everything seems normal up until a you actually try to request a segment out of an image. Here is my log: DEBUG: adaptor_msg_classic: [127.0.0.1] Got NABU_MSG_PACKET_REQUEST. DEBUG...

As someone who fell into this trap and spent a lot of time debugging, I can confirm that this will not work. As far as I can tell, the M7264 needs some sort of memory to start up. I can't tell you if it needs to start at memory location 0 or not, but it needs to be there. Without it you won't...

He must have been very busy today. The one I ordered on 11/26 also finally shipped.

I did see that project, but the interface strategy they are using will only work for CF cards and the (more rare) XT-style hard drives. It is designed to use the 8-bit XFA, while I am designing around the 16-bit ATA bus. That should allow both 8-bit and 16-bit devices to be used without issue...

I noticed that the connector board for the floppy controller utilizes all four options slots. It seems to take all of the card select and interrupt lines from each of the headers, and puts it in one cable. Looking at the pictures, I assume this is to allow additional expansion options to be...

Well, I have spent the entire day swapping boards, drives, and backplanes around. Here are the conclusions I have come to: 1. Moving the M7264 into a terminated 18-bit Q/Q backplane makes no difference. Both the RXV31 and M8029 fail in the same way. 2. The M8186 works perfectly fine in the H11...