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AlphaMicro Systems AM1000, AM1200, & maybe AM100L drive replacement

I'm a dummy, I see it now!


..0...1....2
\9/ \9/ \9/ \?/ \?/ \??/
my ascii pic above
line 1: Port numbers
line 2: db pins

I don't recall 6 built-in ports on the am1200 motherboard (I.E. the first line) I'm still confused about the last three ports on the first line.
I'm pretty sure I have some am1200 docs, what should I look for?
 
Well, I have three sets of schematics for three different revs of 1200's, and am not sure if that covers all 1200's, don't think we ever bought that rev.
At least one schematic say the parallel port runs off a Z80>Z80PIO.

What the first db25 port 4 or the 4th db9 port 4 does I have no clue.
just checked my source library, AM1200.m68 which doesn't seem to have a reference to any other ports than 0,1,or 2, and an AM1213.m68 which references a parallel port and a Z80 DB25 serial port (CP/M?), which still leaves that 4th db9 un-known, hope that's of some help.
 
curbie said:
Well, I have three sets of schematics for three different revs of 1200's, and am not sure if that covers all 1200's, don't think we ever bought that rev.
At least one schematic say the parallel port runs off a Z80>Z80PIO.

What the first db25 port 4 or the 4th db9 port 4 does I have no clue.
just checked my source library, AM1200.m68 which doesn't seem to have a reference to any other ports than 0,1,or 2, and an AM1213.m68 which references a parallel port and a Z80 DB25 serial port (CP/M?), which still leaves that 4th db9 un-known, hope that's of some help.
Click to expand...
i imagine you also have am1203.m68 source...
 
As released by Alpha in 1.1A, looks like standard 68681 Duart stuff.
 

Attachments

  • AM1203.M68.txt
    54.8 KB · Views: 2
nope, 1.1A had it, I don't know about 1.0, I don't know what you're looking for but, is it possible it's a part of the z80 rom stuff, which I don't have?
 
are you writing your VAM/L stuff to emulate at 8/10mhz, or as fast as the host will drive it, or both?
 
curbie said:
nope, 1.1A had it, I don't know about 1.0, I don't know what you're looking for but, is it possible it's a part of the z80 rom stuff, which I don't have?
Click to expand...
What I am really looking for is AM doc showing which of the am1200, am1203, and am1213 ports should map to what connectors on the back
I'm speculating my am1200 has a few faults - wouldn't be surprising on a $200 ebay find!
This has nothing to do with VAM - no reason it needs to match the old real world!
In that same vain I'm not trying to speed match. Even at this early stage, running on a five year old laptop, it's obvious VAM is way faster than my old am1200.
 
I'm not AM documentation, but my guess is; AM1200=0,1,2 are labeled on your pic as db9 (0,1,2); AM1203=db9 (3-10), and AM1213=0,1,2 db25 (3), db9 (4), db25 (5).
Now if the AM1213 ports are like the AM1013 ports, there are also jumpers to configere the port's function.

One of the first things I did for FMC was to setup 1013's IBM RJE PORT to send their customers Medicare charges to Blue Cross/Blue Shield, so if your 1213 is not .jumpered for 3 serial ports, that would be an issue, if I recall correctly and if the 1203 functions the same as the 1013.
 
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