collapseos/807 at 650481f849218ba0c6fadca594ef16e442bdeb9b - collapseos - SKS Gitea

izaya/collapseos

mirror of https://github.com/hsoft/collapseos.git synced 2024-09-07 11:08:46 +10:00

Virgil Dupras 650481f849 z80/8086: extract 2>R code from stable ABI zone

Only its jump at 0x33 remains.

I've also fixed a strange offset oddity in 8086's (n) placement.
It was off by 2, but strangely, it ran properly. Anyway, now it's
fixed.

2020-07-05 08:03:15 -04:00

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 CODE (loop) ( 0x80 )
     [BP] 0 INC[w]+, ( I++ )
     ( Jump if I <> I' )
     AX [BP] 0 MOVx[]+, AX [BP] -2 CMPx[]+,
     JNZ, L2 @ RPCs, ( branch )
     ( don't branch )
     BP 4 SUBxi, JMPs, L1 @ RPCs,
 ORG @ 0xb9 + HERE !
 CODE (n) ( 0xbf, number literal )
     DI DX MOVxx, DI [DI] MOVx[], DI PUSHx,
     DX INCx, DX INCx,
 ;CODE NOP, NOP, NOP, NOP,