11 Sep
2004
11 Sep
'04
6:27 p.m.
Does anyone
have information on error-codes that are flashed by PET disk drives
after power-up diagnostics fail.
I have a drive set which after powerup, enters into a state where it flashes the
POWER LED alternating with both drive LEDs (together) - It repeats this flash
cycle exactly 6 times, then pauses, then another 6 ... forever.
I assume it's a diagnostic failure - Can anyone tell me what it means?
UEs, it's a diagnostic code. From the 8050/8250 service manual (component
references will be different in other drives, I guess )
# flashses
1 Zero Page 6532 UC1,UE1
2 ROM $E000-$FFFF 2364 UL1
3 ROM $C000-$DFFF 2364 UH1
4 Not Used
5 Zero Page 6530 UK3
6 RAM $1000-$13FF 2114 UC4,UC5
7 RAM $2000-$23FF 2114 UD4,UD5
8 RAM $3000-$33FF 2114 UE4,UE5
9 RAM $4000-$43FF 2114 UF4,UF5
10 Cotnroller ROM 6530 UK3 or 6502 UH3 
11 Sep
11 Sep
6:37 p.m.
On Sat, Sep 11, 2004 at 07:27:53PM -0400, Dave Dunfield wrote:
[If it is a 2114, it will be the second one I've
found dead in PET hardware
over the past month - other was was video RAM in a 4032]
Not surprising. The first gen. of COMBOARDs used 32 x 2114... we used to
see them fail more than any other type of part.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 11-Sep-2004 23:30 Z
South Pole Station
PSC 468 Box 400 Temp -50.8 F (-46.0 C) Windchill -82.09 F (-63.4 C)
APO AP 96598 Wind 11 kts Grid 354 Barometer 667.7 mb (11095 ft)
Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html
11:47 p.m.
[If it is a 2114, it will be the second one I've
found dead in PET hardware
over the past month - other was was video RAM in a 4032]
FWIW, I've had _lots_ of 2114s fail. I had to replace all of them in my
8050 (IIRC, if you hvave multiple RAM errors, you get the flash code for
the lowest bank first, then when you've replaced those you get the code
for the next bank, and so on...). I had to replace the video RAMs in my
TRS-80 Model 3. And the RAM in my HP82163 video interface. And more...
In my experiece the 2114 is one of the least reliable chips ever...
-tony
7424
days inactive
7424
days old
2 comments
3 participants
participants (3)
-
ard＠p850ug1.demon.co.uk -
dave04a＠dunfield.com -
dickset＠amanda.spole.gov