Bug in Zap?

Hi,

Using an oldish Zap (v1.40) on the emulator, I noticed an odd bug while trying to get some code to attempt to bring up a Beagle from bare minimum (I’m busy battling the protection unit, and just realised I need to init the SDRAM too – jeez, can’t it just start up working like an old 8K SDRAM chip!?).

Aaaanyway… I assembled STR R0, [R12] and it assembled with the opcode &E58C0000. This showed up as STRW R0, #&00000000. Attempting to directly assemble the desired instruction gave the same result. It appears to only affect R12, and seems at a cursory glance as if it is trying to follow STR to PC behaviour.

FWIW, didn’t work. :-( Oh well, it’ll be in the post to Joe on Friday (sans food stuff, sorry!).

The revised code is at http://www.heyrick.co.uk/random/MiniMLO.txt feel free to laugh at my pathetic efforts.

Best wishes,

Rick.

Okay, just to follow up, the Zap bug doesn’t happen with v1.48 on RISC OS 5.18.

As for MiniMLO, found a bug, fixed it. Still doesn’t work. I give up. Working blind here so… I think I’ll go catch up on Hyouka instead. ;-)