C H Dickman wrote:
Charles H.
Dickman wrote:
I have an RD32 that I just formatted with an
RQDX3 last week. I am
going to get my Pro380 out and see what happens. I will probably do
this with RT11.
The RD32 did not work. I could not convince the standard FORMAT
program to format the disk. This may be because the RD32 had 6 heads
and none of the standard Pro drives had 6 heads.
I then took a 3.5" NEC D3142 drive that came out of an old NEC PC and
it formatted in the Pro just fine. This drive has 8 heads and 642
tracks. If the FORMAT program uses the same identification algorithm
as DW.SYS, it probably sees that it has 8 heads and interprets that as
an RD52Q.
Is there a way to boot from the RX50 if there is an OS on the hard
disk in a Pro? The only way that I could get the RX50 to boot was to
remove the hard disk and then power up without a floppy in the drive
and then when I got the diskette image on the screen to insert the floppy.
Jerome Fine replies:
I have heard that it is possible to format an RD52 on the PRO,
in addition to the RD51, so I am not surprised. How many blocks
are on the NEC D3142 drive?
I have a PRO350 which I have not used in many years, so
I can't remember. However, I strongly tend to think it
has POS installed. Consequently, when I attempted to boot
RT-11, I just inserted the RX50 floppy in the RX50 drive
and powered on the system. I can't remember, but I think
that RT-11 booted from the floppy.
The aspect that I find most interesting is that RT-11
requires a special device driver that I understand
intercepts certain system and hardware interrupts
such as the clock. This device driver is made
resident at boot time, so something is very special
with that device driver. Since there is no documentation
on the PRO hardware, can anyone suggest anything?
Otherwise, I will have to sort out this question from
the source code.
Sincerely yours,
Jerome Fine
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