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PDP11GY
February 13th, 2010, 01:43 AM
Hello,

my project , DEC-RL02 disk simulator is going complicated. If you want , you can watch
the status on my hompage: http://www.pdp11gy.com/ . Not all tranlated in English but
section 1.5 provides a good overview and a lot of pictures give you a good impression.
Complete translation in English is in progress.

My problem and may be , you can help.
On the RLV-12 controller with reference to MP01283-RLV12-Engineering Drawing
on page 10of 15 , WRITE-ENCODE-CIRCUIT is the E120 , 32x8 ROM chip.
DEC part#: 23219a1-00
What i urgent need is the contenjs of this ROM. Does anyone have acces to the
DEC micro-fish library. I think there in the engineering notes , this information
schould be available.
I need this information, because i have to implement the WRITE-ENCODE logic
in the ALTERA FPGA.

Any comments and concern is welcome

Many thanks in advance

Reinhard

Dms12444
February 13th, 2010, 05:13 AM
I don't have the contents but I have tracked down several websites that mention it. Perhaps they will be helpful to you:

http://www.bitsavers.org/pdf/dec/qbus/MP01282_RLV12_EngrDrws.pdf
http://www.cosam.org/computers/dec/pdp11-23/20080403.html
http://www.classiccmp.org/pipermail/cctech/2008-April/093230.html
http://www.lightningterminals.com/dec_disk_ctrl_26.html

Good luck with your search.

PDP11GY
February 15th, 2010, 04:23 AM
Hello,
Many thanks for the information. However, I was already on the URL http://www.bitsavers.org/pdf/dec/qbu...2_EngrDrws.pdf .
Here I find only one flowchart concerning the ROM contents. It would become too complicated find out the ROM-code via the flowchart. I will try to remove the ROM from the RLV-12 controller board ( out solder ) and read out the contents via external device. Its a small ROM with 32byte only, but I have to damage worry my RLV-12 controller. Anyway, many thanks for your effort.