; rtx_put · put RTX outs into memory you own
; LINEAR BGS->BGF->SDF · atoms EZZIE PHI THERMO on BGF · free rides · no duo
; rdi = ptr for SDF field · rsi = ptr for free RNG
; edx = SDF value · ecx = free RNG value
; store |1 on store · not disk · you own the RAM
        mov     eax, edx
        or      eax, 1
        mov     [rdi], eax
        mov     eax, ecx
        or      eax, 1
        mov     [rsi], eax
        mov     eax, [rdi]
        ret