Hello! Den ons 16 apr. 2025 kl 21:36 skrev Jos Fries via cctalk < [email protected]>:
> The "RK11-D and RK11-E moving head disk drive controller manual" > (EK-RK11D-MM-002) states in par. 2.5 (Installation Procedure) that the > register and vector addresses of a RK11-D can be configured by "seven > interrupt vector address jumpers and eight address selection jumpers of the > M7257". The manual however doesn't state the address range that can be > configured by these jumpers and refers to engineering drawing > D-CS-M7257-0-1 for that information. I found these drawings in the RK11-D > Engineering Drawings but cannot find information in them on the valid > address ranges. Therefore my question: what is the address range a RK11 > controller can be configured for? > Most (All?) unibus devices can be set anywhere in the PDP-11 IO space. This means the last 8kbyte of the 256k Unibus space. Addresses 760000 - 777777 octal. A quick glance at the schematic shows that this is true for the RK11-D as well. What is interesting though is that the doc mentions 8 address jumpers while according to the schematic it has 10. Jumpers W4-W13. /Mattis
