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- ; BGMEMTST.ASM
- ; Background memory test
- ;
- ;Version 1.1 - 5/31/81
- ;
- ;From Lifelines pg 18 & 19 May 1981
- ;
- ;Program created & written and
- ;Credit should be given to: Al Rich
- ; Soft Warehouse
- ; Honolulu, HI
- ;
- ;Mods/fixes (in reverse order to minimize reading time)
- ;
- ; 5/31/81
- ;Cleaned up file. Keith Petersen, W8SDZ
- ;
- ; 5/30/81
- ;All I did was to type this in & make sure that
- ;I didn't introduce any typing errors. As of
- ;5/30/81 I have patched this into my CP/M I/O
- ;and it seems to run. I.e. there are no un-explained
- ;hangups.
- ; Henry B. Rothberg
- ; 1 Laticrete Park North
- ; Bethany, CT 06525
- ;
- ;
- ;This is a 'constantly running' memory test that
- ;is inserted into your CP/M I/O drivers at CONIN
- ;
- ;Change the jump table in CP/M to jump to CONIN0
- ;instead of CONIN.
- ;
- ;Whenever your sytem is waiting for a character
- ;to be input from the terminal, the computer will
- ;be testing memory.
- ;
- ;
- CONIN0 CALL TEST
- ;
- CONIN IN CSTAT
- ANI IMASK
- JZ CONIN0
- IN CDATA
- ANI 7FH ;strip parity
- RET ;use this ret many times
- ;
- ;
- ;Test routine to constantly test memory
- ;
- TEST push h
- lhld tstpt
- inx h
- mov a,h
- cpi $/100h
- jnz test1
- lxi h,0
- ;
- test1 shld tstpt
- mov a,m
- cma
- mov m,a
- cmp m
- jz test2
- xra m
- push psw
- call prtstr
- db 0dh,0ah,'*** ',0
- pop psw
- push psw
- call prthx
- call prtstr
- db ' Bits BAD at: ',0
- mov a,h
- call prthx
- mov a,l
- call prthx
- pop psw
- ;
- test2 cma
- mov m,a
- pop h
- ret
- ;
- prthx push psw
- rrc
- rrc
- rrc
- rrc
- call prthx1
- pop psw
- ;
- prthx1 ani 0fh
- cpi 10
- jc prthx2
- adi 7
- ;
- prthx2 adi '0'
- ;
- outpt push b
- mov c,a
- call conout
- pop b
- ret
- ;
- prtstr xthl
- push psw
- call prt
- pop psw
- xthl
- ret
- ;
- prt mov a,m
- inx h
- ana a
- rz
- call outpt
- jmp prt
- ;
- tstpt dw 0
- ;
- ;End of constant memory test