[sebhc] Schematics and board layouts
Bill Beech (NJ7P)
nj7p at nj7p.org
Sat May 19 20:13:23 CDT 2007
Great! My address is:
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.
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.
>> Delivered by the SEBHC Mailing List
> 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
> Delivered by the SEBHC Mailing List
Delivered by the SEBHC Mailing List
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