12 Mar
2023
12 Mar
'23
12:25 p.m.
On Mar 12, 2023, at 3:01 AM, Chuck Guzis via cctalk
<cctalk(a)classiccmp.org> wrote:
On 3/11/23 14:34, Chuck Guzis via cctalk wrote:
Dijkstra's review can be seen here: https://www.cs.utexas.edu/~EWD/ewd00xx/EWD37.PDF
paul
On 3/11/23 13:28, Paul Koning wrote:
Perhaps I need to elaborate on my earlier response for those not
familiar with the 1620.
...
There is no stack,but there is a single register that holds a single
return address when a Branch-and-transmit instruction is executed.
There is a single instruction that branches to the location held in that
register; the register itself is not addressable.
...
Hope this provides some background for what irked Dijkgstra.
Dijkstra said as much when he evaluated the 1620 for possible use by the TU Eindhoven --
a big problem is that it was unable to handle arbitrary 8-bit data.