17 May
2005
17 May
'05
4:01 p.m.
On Mon, 16 May 2005 23:54:34 +0100 (BST)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Steve Ciarcia used to say his favorite 'programming language' was
solder.
I remember that...
Actually, I have modified a program using a soldering iron. I have the
M792 diode matrix boot ROM in my PDP11/45. Actually I have 2 of
them, one contain the paper tape bootstrap, the other the mass storage
device bootstrap. The latter will boot the RK05 (which i have), amongst
other devices -- to use it, you load 773100 (start address of the boot
ROM) into the address register, then put the CSR address for the selected
device on the switches, then START. Anyway there were a few unused
locations at the end of the ROM, so I soldered in the appropriate diodes
to load the right register with the RK11 CSR address and jump to the
right point in the ROM. The result is that I can leave the address of the
first of those instructions on the swtiches, then just hit LD ADDR and
START to boot the RK05.
-tony
Hey, WTF,
over?! I thought you guys were all programmers?
Hey, I've never claimed to be a programmer. A hardware hacker, maybe,
but not a programmer...
-tony