Hi Wayne,
I'm not sure if you are the person for adding me to
the 'List and Board Characteristics' on the Zeta
page.
If yes - my data are
Builder:
Norbert Joppen
CPU Clock Speed: Running
on 20 MHz. 4, 6, 8 and 10 MHz tested.
Floppies:
3.5" Sony MPF 920 ,only 5V needed,
720K/1.44MB.
PPIDE:
Planned
Firmware:
RomWBW 1.5.2
Notes:
PCB Version 1.3, 74LS logic except 74F139, MAX202CPE with
0.1u capacitors.
Thanks,
Norbert
Sent: Saturday, June 16, 2012 12:07 AM
Subject: [N8VEM: 13857] Re: Question for understanding Zeta's memory
structure
B: is the ROM drive. The directory listing you attached
looked fine. You will not be able to copy anything to the ROM disk because
it is a read only device. A: is the RAM drive and starts out empty.
You will be able to copy stuff there. The RAM drive contents will
only be preserved across power off if you have the battery installed.
-Wayne
On Friday, June 15, 2012 2:21:03 PM UTC-7, Norbert Joppen
wrote:
Hi all,
My Zeta SBC is ready now I and would like to know, wether the
capacity of the drives A0: and B0: and their status (R/W, R/O) are
correct.
I have a Zeta SBC board version 1.3, and ZETA Z80 SBC Boot Loader
v1.5.2 (RomWBW-WWarthen-120407T0910) .
Is it ok that STATshows both drives to be R/W and that there are 56k free
on B0: ?
When I try to copy a small program (2k) to B0: then the
message occurs:
ERROR: READ ONLY DISK (ROM)
BDOS ERR ON B: BAD SECTOR
Isn't B0: a RAM copy of a part of the ROM contents?
I have attached a screenshot for further information.
Thanks,
Norbert
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