Testbench testing (PC Chips M919) part 2

Second part of my testbench testing video. In this part we test HDD bios limit, Sound card that requires -5V, a PnP Sound card, slowing the CD/DVD-drive with CDBQ and de-turbo speed issues. You can find CDBQ at https://tools.dosforum.de If you are looking for a good DVD-RW-drive for DOS retro systems, I've found these two to be the best (they have perfect CDBQ support): NEC ND-3520A NEC ND-3540A 0:00 Changes since Part 1 3:50 Hitachi 40GB HDD 5:54 Strange HDD size limit on this BIOS 10:14 15 heads 16:39 8GB Seagate U8 21:22 Old BIOS 23:49 Hitachi 15 heads jumper 27:15 PC-DOS 7.1 31:10 Sound card that uses -5V 36:18 PnP sound card 39:45 DVD drive testing 45:13 CDBQ 50:30 Turbo switch 52:15 A good DVD drive 53:17 UMC IDE drivers 59:55 De-turbo benchmarking 62:35 Space Quest 4 with working sound