u-bjense%sunset.utah.edu@utah-gr.UUCP (Bryan Jensen) (03/31/88)
Recent interfacing problems between my A500 and external Pro-drive led me
to find a small quirk. It seems that when my printer is connected
(via parallel) but NOT powered-on, my external disk drive will not function
properly. However, with the printer on, the entire system works flawlessly.
I don't know for sure, but I suspect this 'quirk' is either a result of
the A500's weak power supply or something with the printer...
So, if you or someone you love is having system problems that appear to
be power-related, try leaving that printer on. It could save lots of
frustration...
-Bryanbryce@eris (Bryce Nesbitt) (04/01/88)
In article <> u-bjense%sunset.utah.edu.UUCP@utah-gr.UUCP (Bryan Jensen) writes: | |...It seems that when my printer is connected |(via parallel) but NOT powered-on, my external [ProDrive] disk drive will |not function properly... | |I don't know for sure, but I suspect this 'quirk' is either a result of |the A500's weak power supply or something with the printer.... It has nothing to do with the power supply. The supply does 1 Meg of ram + the external drive fine. What you are discovering is that the reset line for the printer port is common with the disk. While off, the printer is loading this in a manner your ProDrive finds objectionable. This may be the fault of the printer... but I would suspect the design of the ProDrive. |\_/| . ACK!, NAK!, EOT!, SOH! {O_o} . Bryce Nesbitt (") BIX: mleeds (temporarily) U USENET: bryce@eris.berkeley.EDU -or- ucbvax!eris!bryce "Good artists copy, great artists steal." -Steve Jobs, commenting the Apple
rminnich@udel.EDU (Ron Minnich) (04/05/88)
In article <2423@utah-gr.UUCP> u-bjense%sunset.utah.edu.UUCP@utah-gr.UUCP (Bryan Jensen) writes: >to find a small quirk. It seems that when my printer is connected >(via parallel) but NOT powered-on, my external disk drive will not function >properly. However, with the printer on, the entire system works flawlessly. >I don't know for sure, but I suspect this 'quirk' is either a result of >the A500's weak power supply or something with the printer... I had the same problem. Your parallel cable is wrong. If your cable was set up for an A1000 it WILL NOT WORK on an A500. You need to delete two lines, If i remember correctly one of them is to pin 25 on the A500, the other i forget. If you can't get it email me and i will take my connectors apart. This A500 power supply business is a shame. Wonder how many non-power-related problems are attributed to the power supply? -- ron (rminnich@udel.edu)