It’s a pity that no manufacturer has improved/changed these type of breadboards. Back in the early 80’s I could buy a breadboard with a 0.6” middle pitch from Tandy. Now we get low quality Chinese boards with a damn gap in the middle of the side rails. I have some nasty Chinese breadboards where the pitch is not exactly 0.1”, which you only notice when you plug in a MC68000 or similar multi pin connector.
I agree. I use the Busboard Prototype systems (Ben Eaters recommenation) ones which I get from Mouser in batches of 10 or more (£7-8). They are more expensive but I have found them to be reliable. It would be good to have 0.6" wide gaps and tabs at each end to join them. Also bus rails say in 8's without the gaps you get with the power rails. Steer clear of the cheaper boards, they will waste a lot of time. Dave
I am not really sure! I FDISKed and formatted the drive again and it works as C:\. It could be related to the BIOS Parameter block info which goes in the OS Boot sector (not the MBR) but that is just a guess! The code in DOS which deals with floppy disks and hard disks seems to have lots of kludges in it to work around various hardware issues (and number requested by IBM from DOS 4.0 source). Main thing is it works! I will be digging into MBR/Partition table and OS boot sector in subsequent videos. Dave
It’s a pity that no manufacturer has improved/changed these type of breadboards. Back in the early 80’s I could buy a breadboard with a 0.6” middle pitch from Tandy. Now we get low quality Chinese boards with a damn gap in the middle of the side rails. I have some nasty Chinese breadboards where the pitch is not exactly 0.1”, which you only notice when you plug in a MC68000 or similar multi pin connector.
I agree. I use the Busboard Prototype systems (Ben Eaters recommenation) ones which I get from Mouser in batches of 10 or more (£7-8). They are more expensive but I have found them to be reliable. It would be good to have 0.6" wide gaps and tabs at each end to join them. Also bus rails say in 8's without the gaps you get with the power rails. Steer clear of the cheaper boards, they will waste a lot of time. Dave
I see that you have fixed the default boot drive letter from D: to C:
It was a partition table problem or not?
I am not really sure! I FDISKed and formatted the drive again and it works as C:\.
It could be related to the BIOS Parameter block info which goes in the OS Boot sector (not the MBR) but that is just a guess! The code in DOS which deals with floppy disks and hard disks seems to have lots of kludges in it to work around various hardware issues (and number requested by IBM from DOS 4.0 source). Main thing is it works!
I will be digging into MBR/Partition table and OS boot sector in subsequent videos.
Dave