64 mode display oddity

[Hideki]

Hihi

I was very recently given this 128d and a load of other commodore related kit and I've noticed something in 64K mode

Sometimes (when compressed games are decompressing or sometimes when speedloaders are loading) I get some display corruption, random characters/attribute colours flickering, it only lasts a few seconds though and always occurs in the same places (and never in BASIC)

This corruption didn't happen on the real C64, only on this C128D in 64 mode but not having had a working 128 before, I've not seen this...

Is it a known issue with the machine or is there some minor fault with mine?

Thanks ^^

[nikoniko]

You mean that isn't normal? I had only a C128D and never a C64. I always thought it was the decompressors copying code into screen memory and executing from there, thus causing some screen corruption until done. I guess I was wrong if it doesn't happen on real C64s. :/

[Mangelore]

I thought this behaviour was normal and also present on 64's. Just the other day I loaded a few "compressed" games from floppy to a C64 DTV and saw the good old raster colours, random characters etc during decompression.

[Stephane Richard]

From memory, I though it was normal too...Maybe the difference between the first and 2nd release of the C64?  like with the 6502 chip (first editiong) and the 6510 chip (2nd edition)?

Now you got me curious.

[StyleCHM]

A lot of decompressors copy code into $0400. I think youll find that real c64s do the same thing.

[klx300r]

both my 64 and 64c do the same thing ..I also have a flat 128 and it works identical to both my 64's when crunching/decrucnhing stuff