I have added DOS version numbers to you list as follows:
On Mon, 18 Dec 100 g.baltissen@hccnet.nl wrote:
> The 6530 of both 4040's and an upgraded 3040 (done by the previous owner)
> have the following chips:
> UK3: MPS 6530 DOS 2 original version
> 034 xxxx (part number 901466-004)
> where xxxx = week/year
> UH1: 901468-13 DOS 2 original version
> UJ1: 901468-11 DOS 2 original version
> UL1: 901468-12 DOS 2 original version
>
> The broken 4040 had the following chips:
> UK3: 901466-02 DOS 1 (6530-028)
> UH1: 901468-07 DOS 1
> UJ1: none/missing not used for DOS 1
> UL1: 901468-06 DOS 1
>
The DOS 1 6530 must be used with DOS 1 ROMs.
The DOS 2 6530 can be used with eother version of DOS 2 ROMs.
The 2040, 3040, and 4040 are actually the same machine with different
ROMs, 6530s and labels.
You should be able to switch the ROMs and 6530 to the working board and
the system should run. If not, one of the ROMs or the 6530 is bad.
Remember: you must use the correct 6530 for the ROMs.
Be careful not to mix ROMs from differemt versions.
UK6 is the GCR ROM. It is the same for all versions.
If it is defective, you will not be able to read or write.
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