Short - a pair of os9 opsys extensions for Native mode 6309 systems only os9p3 is the F$Perr replacement that gives you a verbose error report. os9p4 is a new system call, F$RegDmp (103F 70) that gives an onscreen register dump showing the complete status of the 6309 cpu at the time of the call to it from your code. Just be sure you save regs.cc before you exec this, and recover it after you have if the next few instructions need that status saved. Author Various. Patcher-uploader