Southwest Specialty Products 6800 instruction

6800 ROM MONITOR

Southwest Technical Products Corporation

219 W. Rhapsody San Antonio, Texas 78116

Scanned and edited by Michael Holley Sept. 17, 2000 Revised Aug. 6, 2002

Southwest Technical Products Corporation Document Circa 1977

Image 1

Contents

ROM Monitor Verson Users Guide Swtpc Swtbug Swatbug Monitor ROM Reset Swtbug InstallationSwtbug Operation Register Dump Function R Memory Examine and Change M addr BIT BIT no Label Condition Code Ascii Tape Punch Command P CT-1024 Clear Screen Command CGO to USER’S Program Function G Jump to USER’S Program Jaddr Most Significant Byte of Lower Address END of Tape Command ELeast Significant Byte of Lower Address Most Significant Byte of Upper Address Tape Loader Function L Optional Port Command O not zeroSoftware Breakpoints Baddr Do not This is OK Disk Boot DJump to Prom Program Z Byte Search F high address low address byte Using Maskable IRQ Interrupts Using NON-MASKABLE InterruptsVectored Software Interrupts Vectored INPUT/OUTPUT Use of the Control Interface for Read/Punch-On/Off Decoding PIA StrobingBaud Rate Loading Binary Tapes Thru Swtbug Compatibility Blkjak Swtpc 6800 Black Jack Program Special Notes on Using AN Acia and Program ModificationsCO-RES Ver .0 and 1.01 Acia Modifications General Rules for Program Writing Memory DiagnosticsProgram Description Temporary Storage Locations Swtbug Subroutine and Text String Description Outhr E06B ACC a ACC B Cksm IXR UnchangedOutee LDA a FCC /HELLO Start LDX #TEXT JSR PDATA1 JMP Contrl TextFCB END Nmiv E1A7 Contrl E0E3Search E1AE Goto E1D0 Break E2D9 Clear E2CCPNCHS9 E31E Pnchon E34D