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Xolod #119125 05/11/21 11:52 AM
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Interesting, a good question would be how PC ends up becoming 1800. I'm pretty sure it isn't pixies doing it, but the system manual isn't exactly clear on that point.

Xolod #119126 05/11/21 12:36 PM
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Maybe look at the 8086 side? The reset vector is very clear there (at fff0) with a far jump to 3000:0000 which is just as clearly where the rom is mapped. It may be that the 8086 boots the z80.

Xolod #119128 05/11/21 02:26 PM
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There were a few S-100 CPU boards that used TTL to force a JMP instruction onto the data bus to enter boot ROM at some arbitrary address.

Xolod #119129 05/11/21 02:32 PM
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Yeah, the system manual made it sound like the Z80 was the more heavily-used of the boards (for CP/M and the like), so I figured it would be what starts up the machine, but it seems otherwise.

Xolod #119136 05/13/21 09:39 AM
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I got the theoretical opportunity to get my hands on a board with an NS32000 processor for Labtam. Unfortunately, there is no software or documentation for it. But perhaps we will find something for her. If there is interest in such a board?

Xolod #119137 05/13/21 10:23 AM
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Is the NS32000 processor board for the 3000 or another Labtam model?

Xolod #119138 05/13/21 11:14 AM
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it is from another large rack mount model but the name is unknown.

Xolod #119139 05/13/21 12:03 PM
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If you can dump all of the ROMs on it, I'm sure some MAME dev can do something with it. As pmackinlay's post in the 2021 WIP thread indicates, MAME now has a reasonbly well-working NS320xx CPU core.

Xolod #119149 05/14/21 12:11 PM
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yes i will dump rom. but I don’t know when. I need a day off for the trip. Just Desserts, do you have any progress on the Labtam driver?

Xolod #119151 05/14/21 12:49 PM
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Xolod, it's been an incredibly busy 3 weeks at work. I have a 5-day weekend (today is day 2 of that weekend) to compensate, but I'm looking at some more "fun" things before I get into the grind of a new driver. It'll be either later today or tomorrow that I start piecing it together.

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