What is Diagrom trying to tell me.

[big-ted]

I've got a rev 5 board that boots to green screen.
so memory issue somewhere.
Unfortunately I can't get my head around bits and bytes, which would probably help here.

I've popped in the newest diagrom and as suspected it shows a memory issue, but its all the same error across the test. I might be wrong but does that mean an address line is an issue ?

Garbage before this text was binary numbers: 1, 2, 4, 8, 16, 32, 64, 128, 240, 15, 170 and 85
To help you find biterrors to paula. Now starting normal startuptext etc
Amiga DiagROM V1.2 - 13-Aug-19 - By John (Chucky/The Gang) Hertell


Testing if serial loopbackadapter is installed: <> NOT DETECTED
- Parallel Code $ff - Start of ROM, CPU Seems somewhat alive
Checking status of mousebuttons for different startups:

Set all Interrupt enablebits (INTENA $dff09a) to Disabled: Done
Set all Interrupt requestbits (INTREQ $dff09c) to Disabled: Done
Set all DMA enablebits (DMACON $dff096) to Disabled: Done

Testing if OVL is working: OK
- Parallel Code $fe - Test UDS/LDS line
- Test of writing word $FFFF to $400 OK
- Test of writing word $00FF to $400 FAILED
- Test of writing word $FF00 to $400 OK
- Test of writing word $0000 to $400 FAILED
- Test of writing byte (even) $ff to $400 OK
- Test of writing byte (odd) $ff to $401 OK
- Parallel Code $fd - Start of chipmemdetection

Addr $00000400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00008400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00010400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00018400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00020400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00028400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00030400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00038400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00040400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00048400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00050400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00058400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00060400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00068400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00070400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00078400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $00080400



...shortened as ran out of room on the post but they are all the same....

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001C0400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001C8400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001D0400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001D8400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001E0400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001E8400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001F0400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED
Addr $001F8400
Write: $AAAAAAAA 10101010101010101010101010101010
Read: $ABAAABAA 10101011101010101010101110101010 FAILED

Write: $F0F0F0F0 11110000111100001111000011110000
Read: $F1F0F1F0 11110001111100001111000111110000 FAILED

Write: $0F0FF0F0 00001111000011111111000011110000
Read: $0F0FF1F0 00001111000011111111000111110000 FAILED

Write: $00000000 00000000000000000000000000000000
Read: $01000100 00000001000000000000000100000000 FAILED

NO Chipmem detected
- Parallel Code $fc - Trying to find some fastmem (as no chipmem found)
- Parallel Code $fb - Memorydetection done
- Parallel Code $80 - NO Chipmem detected
- NO MEMORY FOUND - HALTING SYSTEM

I have no knowledge of the boards history as its new to me so may have had jumpers messed with as some time but doesn't look like it.

Thanks for looking.

[Vypr]

Looks like you've got one bad RAM chip there, the eighth bit in the RAM test is always high then at least one chip is not returning a signal.
The rev 5 board has 16 single bit RAM chips so it's just a case of finding the bad chip and swapping itout.

[big-ted]

Thank you.

[big-ted]

It was u24 top left mem chip. If anyone gets the same fault.