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6502 recompiler news   Message List  
Reply | Forward Message #319 of 326 |
Re: [staticrecompilers] 6502 recompiler news

> > Does someone have a copy of the Apple 1 EPROM? I'd be willing to run it
> > through Orion to see what comes out the other end.
> Thanks! I did try it myself but was stymied by some basics like it was
> assuming
> an entry point at 0000 and i couldn't see how to override that.

It's looking for the vectors at 0xfff8-0xffff, which is probably all 0s
unless you load something there.

Try adding:

loadimage 0xf000, "3rdparty\\roms\\apple1basic.bin";

To the script. That should take care of it. I'll give it a shot here and
see how it goes.

-->Neil

----------------------------------------------------------------------------
C. Neil Bradley - EVERYBODY KERNEL PANIC!



Sat Jul 4, 2009 9:02 pm

nb@...
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Message #319 of 326 |
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Michael Steil, the guy who did the Pear dynarec for Macs and who discussed the recompiler howto in his document, has written a recompiler for Apple I and...
Graham Toal
graham_toal
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Jul 3, 2009
8:51 pm

... As far as I understand it, SSA is part of LLVM so using LLVM provides you with SSA optimised code for free, which is good. On the other hand, I prefer a...
Laurent DESNOGUES
ldesnogu
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Jul 4, 2009
11:15 am

... Are you referring to AST + target or just target? I would think the AST route is the way to go. ... Does someone have a copy of the Apple 1 EPROM? I'd be...
Neil Bradley
nb@...
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Jul 4, 2009
6:59 pm

... Of course! LLVM is a compiler back-end - you feed it your AST and it does all the optimisations on the AST for you, and has a choice of target code ...
Graham Toal
graham_toal
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Jul 4, 2009
9:00 pm

... It's looking for the vectors at 0xfff8-0xffff, which is probably all 0s unless you load something there. Try adding: loadimage 0xf000,...
Neil Bradley
nb@...
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Jul 4, 2009
9:04 pm

... Well, that wouldn't have worked as it hit several opcodes that weren't implemented. Here is a new recomp.exe, template, and ROM image for the Apple1: ...
Neil Bradley
nb@...
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Jul 4, 2009
10:10 pm

... That's pretty good! Comparing it manually to http://www.brouhaha.com/~eric/retrocomputing/apple/apple1/basic/a1basic.dis all I've seen so far is a missing...
Graham Toal
graham_toal
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Jul 5, 2009
12:06 am

... and when I made the $FF opcode into data, it generated an output file just fine, and the few missing code sections all look to be there now... My copy of...
Graham Toal
graham_toal
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Jul 5, 2009
12:41 am

... Sweet! Can you send me the latest template? ... I haven't implemented the opcodes for anything more than a disassembly, so if you try to emit C code,...
Neil Bradley
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Jul 5, 2009
12:50 am

... just ... http://www.gtoal.com/apple1/template.apple1 The updated disassembly is http://www.gtoal.com/apple1/apple1.asm.txt ... so ... Well, first priority...
Graham Toal
graham_toal
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Jul 5, 2009
1:53 am

... Well, that's lucky! Usually it completely goes off into the weeds when it attempts to disassemble data. ... The 6502 module wasn't complete and probably...
Neil Bradley
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Jul 5, 2009
12:44 am
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