18 Apr
2002
18 Apr
'02
3:43 p.m.
--- Hans Franke <Hans.Franke(a)mch20.sbs.de> wrote:
d) Memory. Most would go for bytes, or kilobytes...
Only real, main memory. If there is no memory at all,
the number 1 is to be used (well, sounds odd, I can't
come up with a machine totaly without memory).
I'd have to dig, but I found a Z-80-based digital clock
project on a web page recently that had an *empty* 6116
socket. There was ROM code, but no RAM. It ran by only
using "storage" in the registers.
Not quite "totally", but totally without what is normally
considered "main memory".
High numbers are bad.
Agreed. I have an Elf here - 256 bytes of RAM, 0 bytes ROM. What
has less than that? I suppose you could stick a 6810 in there
for 128 bytes, or even a pair of 74170s (4 bytes), but there's
not much you can do with an 1802 in 4 bytes. Load a register over
and over. Toggle the Q flag. Hey... I might just have to build
a 74170->1822 pin swabber and try to run the Elf on 4 bytes of RAM
(I have all the parts here already).
A new contest! Write a working program for the 1802 in 4 bytes.
-ethan
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