Tied terminal utility ^TTTG allowed you to define a terminal port number as being "hooked" to a start program or menu program from which you couldn't break out by hitting [CTRL/C] to get from application-execution mode into programmer mode
SIMH has a command to set the line clock frequency (SET CLK 50HZ) which your SYSGEN would then need to track. I'm pretty sure there's no Ethernet support, but the SYSGEN option "Distributed Database Processing" I think will allow you to configure remote point-to-point access using DMC-11/DMR-11 devices. They are Unibus devices, so you'd need to switch your CPU type to a Unibus machine like the 11/70. No idea how hard it'd be to configure the DMC connection between two SIMH instances.
Right? Even if the computer did use the mains frequency as its timekeeping source, you'd think it'd be an option on the physical hardware to tell it what the frequency is. But maybe it is entirely under software control... e.g. the computer itself just keeps a "clock ticks since poweron" value, which either increments at 50 or 60 counts per second, and the software has to know if it needs to divide by 50 or 60 to determine how many seconds have passed. Pretty crazy!
I went into this one thinking, "oh, it'll be about 30 minutes probably." But as usual, I'm physically incapable of making anything except hour-long videos 😆
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![[046] MUMPS on steroids: FileMan and ScreenMan](/img/tr.png)
![[044] A case of the MUMPS ...on the PDP-11, VAX, and more!](http://i.ytimg.com/vi/Ij9k7EQ5AZQ/mqdefault.jpg)
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![[007] MVS 3.8: Installation/Sysgen Pt. 1 - Introduction and setup](/img/1.gif)
Tied terminal utility ^TTTG allowed you to define a terminal port number as being "hooked" to a start program or menu program from which you couldn't break out by hitting [CTRL/C] to get from application-execution mode into programmer mode
SIMH has a command to set the line clock frequency (SET CLK 50HZ) which your SYSGEN would then need to track. I'm pretty sure there's no Ethernet support, but the SYSGEN option "Distributed Database Processing" I think will allow you to configure remote point-to-point access using DMC-11/DMR-11 devices. They are Unibus devices, so you'd need to switch your CPU type to a Unibus machine like the 11/70. No idea how hard it'd be to configure the DMC connection between two SIMH instances.
How much does it cost to have that server at the data center, ball park?
Its interesting how it needs the mains switching frequency. Never seen that before.
Right? Even if the computer did use the mains frequency as its timekeeping source, you'd think it'd be an option on the physical hardware to tell it what the frequency is. But maybe it is entirely under software control... e.g. the computer itself just keeps a "clock ticks since poweron" value, which either increments at 50 or 60 counts per second, and the software has to know if it needs to divide by 50 or 60 to determine how many seconds have passed. Pretty crazy!
@@MatthewMainframes its really hard to imagine a situation where it's a good solution. Though presumably there is one.
@@christopherjackson2157 Really makes you appreciate the ready availability now of cheap quartz clock crystals.
It does mean that the machine would never have to deal with time values more precise than 1/60th of a second
59 mins, nice and quick-ish, lol
I went into this one thinking, "oh, it'll be about 30 minutes probably." But as usual, I'm physically incapable of making anything except hour-long videos 😆
He kept mis-spelling ^UTILITY in his programs, which then of course didn't show up any
thing