petSD
Modern mass storage solution for Commodore PETs
Table of contents
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The first petSD, 2011
The hardware-design is obsolete and is going to get replaced by a
couple of other devices. The software though still supports the old petSD
and will do so in the future.
If you're looking for a networking-device, please have a look at the
Flyer Internet Modem. Though the networking hardware of the old petSD has proven
to work, there never was any support by software and it's highly unlikely that
there will ever be one.
Hardware
The hardware's heart is an Atmel
ATmega 1284P
microcontroller with 128 KB flash memory and 16 KB RAM,
running at 18.432 MHz. His peripherals are:
- IEEE-488 interface with bus drivers
(75160/
75161)
- SD card slot
- USB interface via virtual serial port (FT232RL)
- real time clock with battery backup (DS1307)
- 10 MBit Ethernet interface (ENC28J60)
- I²C-Bus to connect hardware expansions
- two keys, red and green LEDs
- 6 pin
ISP connector
Two firmwares are available:
Firmware NODISKEMU
NODISKEMU is a fork
of sd2iec by Ingo Korb (et al.).
It supports SD-, SDHC-
and MMC cards formatted with FAT 12/16/32 and the real time clock.
Files can reside in directories of the FAT tree as well as inside disk
images like D64, D80, D82 and others. The real time clock can be read and
set via the command/status channel and is used to set time stamps for files.
USB gives you only some debug messages, Ethernet isn't
supported at all.
NODISKEMU is free software, GPL2 only.
Firmware XD2031
XD2031
by André Fachat (et al.) requires a host computer (connected via USB)
and supports multiple drives at the same time assignable to:
- a directory of the host computer
- a file server (FTP) accessed by the host
- a web server (HTTP) accessed by the host
It has very stable IEEE-488-routines and is designed to be expandable
by further endpoints, so we may see a standalone version in the future.
XD2031 is free software, GPL2 or later.
Downloads
Availability
Distribution has been discontinued. The
assembly instructions
are still available via archive.org.
Many thanks to Roland "Donald" Hager for the distribution.