27 May
1999
27 May
'99
8:13 a.m.
Chuck McManis <cmcmanis(a)mcmanis.com> wrote:
Its definitely up to the bios, when I wrote the BIOS
for the Cromemco 16FDC
I ran out of space, so I took advantage of the fact that a) I could write
full tracks and b) that most SD disks could handle DD and wrote the first
two tracks of the disk double density, even if the disk was "formatted" for
single density. (I also wrote the formatter (in Turbo PASCAL no less!))
Hi Chuck
This isn't an option for me. I'm trying to get it onto a SSSD disk
system. I can't do formatting/reading in double density with the controller
I have. Since I am bringing this machine up from gound zero,
I had to write my own formatter in assembly and hand toggle it
in.
I am now to the point that I can download data through the serial
port from a PC. Still, I have to toggle in the start address.
I had a little space left on my boot sector so I wrote a simple
serial transfer ( no hand shake ).
I guess the issue is that the additional space is the BIOS and
since I'll be replacing this with my own BIOS, and I write efficient
code, I don't have to worry about it until I run out of space?
Dwight