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Forums > C64 Coding > Detecting REU + VICE
2009-01-08 00:29
AlexC

Registered: Jan 2008
Posts: 305
Detecting REU + VICE

I'm looking for reliable method of detecting REU on different machines (c64/128) and VICE. Either I'm doing something wrong or the only really stable method (without actually writing to REU banks like shown here: http://www.codebase64.org/doku.php?id=base:reu_detect) is this one:

lda #$00
sta $df00
cmp $df00
beq noreu

The following code fails on my C128D:
http://www.willcox.de/index2.htm

At this point I don't need the size of REU as I assume that every single one will provide me with 128KB at least and this is as much as I need.

Thanks in advance
 
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2019-09-25 15:45
Count Zero

Registered: Jan 2003
Posts: 2025
Plain reading of registers without an actual transfer is likely to fail with quite a few cartridges. So, what Burglar sez.
2019-09-25 19:33
ThunderBlade

Registered: Jan 2002
Posts: 78
Ok, thanks. I was more afraid of messing around in $DFxx area could lead to unpredictable behavior/crashes with some other (not REU) cartridges.
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