[sebhc] Schematics and board layouts

Bill Beech (NJ7P) nj7p at nj7p.org
Sat May 19 20:13:23 CDT 2007


Great!  My address is:

William Beech
6567 Y-Lightning Rd.
Hereford, AZ  85615

I bet the 32K board is a 64K with half the 4116's missing!  I will copy 
the manual and put it up on the site.

I have an H8-4 serial I/O card and a controller marked "Controller 
Board" and number 85-2204-1.  It has a Intel 2316 ROM and what appears 
to be an AMI S2350 ACIA - so I bet this is the hard-sectored 
controller.  Also an 85-2521-1 board (about 2 inches long) which I 
believe handled double-sided drives.

I appreciate the offer of help.  I will be communicating my progress 
once I get the schematics. 

Thanks again!


Carroll Waddell wrote:

> Bill Beech (NJ7P) wrote:
>> Does anyone have the foldouts for the CPU, RAM, Disk Controller(s) 
>> and other boards used in the H8 that would be willing to mail them to 
>> me to scan in and share with the group?  I will return them once they 
>> are scanned.
>> I am deadlocked trying to fix an H8 here without the schematic for 
>> the CPU card.
>> Also, does anyone have a manual on the "DG-64D 64K Memory Board" for 
>> the H8.  This H8 has only that third-party dynamic RAM board.
>> Thanks!
>> Bill
>> -- 
>> Delivered by the SEBHC Mailing List
> Bill
> Send me your address and I'll let you borrow a schematic of the CPU 
> board. I have some copies that I have reduced down to 11 x 17 of the 
> CPU and H17 controller schematics.
> I have a book on the DG 32K board if you think that would help.  If 
> you need any help repairing your H8, let me know and I'll try to help.
> carrollwaddell at sc.rr.com
> Carroll
> -- 
> Delivered by the SEBHC Mailing List

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