Re: More thoughts about single-load Lode Runner

[Steve Nickolas <usotsuki@buric.co>]

Continuing.

Here's some of the code I think I'm looking for...but I haven't figured 
out what it does yet.  The function begins at 6056 and is JMP'd to by the 
keyboard read routine and the editor.

ZP addresses 96, 9D, A6 and A7 are updated prior to this call.  I don't 
know what-all the code really does, but it obviously calls a routine to 
check if the disk has valid levels...

See http://xtra.usotsuki.info/lrdas1.txt for more information.

-uso.

lvlplay:        LDA     #0
                STA     byte_0_8E
                STA     byte_0_8F
                STA     byte_0_90
                STA     byte_0_91
                STA     byte_0_97
                STA     byte_0_A5
                STA     byte_0_53
                STA     byte_0_AB
                STA     byte_0_A8
                LDA     #$9B ; '>'
                STA     byte_0_A9
                LDA     #5
                STA     byte_0_98
                LDA     byte_0_A7
                LSR     A
                BEQ     loc_0_6099
                LDA     #1
                JSR     sub_0_6359
                CMP     #0
                BNE     loc_0_6086
                JSR     notdatadisk
                JMP     entry