Expects: AH    c0H
                                                                  
Returns: AH    00H (and CF=NC=0) successful, and ES:BX points to valid data
86H (and/or CF=CY=1) unsuccessful
ES:BX addr of system configuration table
                                                                  
Info: This returns a pointer to a table that describes the system.

BiosSysParmsRec
Offset Size Contents
                                                                         
+0      2  wLen       length of this table, in bytes
+2      1  yModel     PC=ff,XT=fe or fb, PCjr=fd, AT=fc, unknown=ff
+3      1  ySubModel  PC,XT,PCjr,AT=00; AT=01, XT-286=02
+4      1  yRevLvl    BIOS revision level (0=initial release)
+5      1  rFeatures1 features bits:
 7 6 5 4 3 2 1 0 
               0 
               -  bit  mask
                   0: 01H  (reserved)
                   1: 02H  0=PC-type I/O channel
                   2: 04H  1=Extended BIOS area allocated
                   3: 08H  1=wait for ext event supported
                   4: 10H  1=INT 15H 4fH supported by INT 09H
                   5: 20H  1=real-time clock is present
                   6: 40H  second interrupt chip is present
                   7: 80H  hard disk BIOS uses DMA chnl 3

+6      1  rFeatures2 (reserved)
+7      1  rFeatures3 (reserved)
+8      1  rFeatures4 (reserved)
+9      1  rFeatures5 (reserved)
10             size of this structure

See Also: INT 15H (extended AT services)
- -

INT 15H c0H: Get System Parameters