DiagROM Hints

[Chucky]

As I am coding more on DiagROM .. i want input of what you miss etc ..

Right now I am redoing the initcode. so it hopefully handles (atleast some) bad addresslines etc.
but what more?

and IN diagrom. WHAT is missing? what shold be done different. ideas please ..

[AmigaHope]

Beamracing text display of error information on chip ram failures by directly banging Denise. Detect this scenario through soft reset by abusing any survivable registers from crash. I am lame and don't know what gets reset from reset signal, just a feature request if possible. Have not used Diagrom in a while so don't know if you've already implemented it. =P

[cpiac64]

sorry no hints


i need help to solve this:

hi friend, i have a pal a1000 with error in ghost ram (kickram) and need function for test it

an espansion for a1000 work on a500 but on a1000 ntsc your ram test fail

[cdh]

Chucky, thank you for making this excellent tool!

It recently helped me diagnose a problem with an Amiga 2000. In my case, Agnus pin 75 (A16) was not making good contact with the socket. The error report was that there was a problem with Chipmem. In retrospect, it makes perfect sense, but I had pursued it as a connection issue between Agnus and the DRAM.

Addr $00010400   OK  Number of 32K blocks found: $02
Chipmem Shadowram detected, guess there is no more chipmem, stopping here
Startaddr: $00000400  Endaddr: $0000FFFF

- 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

When I split the motherboard 1MB into 512K flash and 512K chip, I was surprised that it hung later (it detected Fast RAM). The reason why it hung is (now) obvious -- the fast memory was also missing A16. It seems like walking address lines on early init fast memory should have detected this.

I don't know if there's anything which can be done to detect address line issues before chip memory is up, so I'm just putting this out there as symptoms when A16 is not connected between the CPU and Agnus.