[HECnet] Task Buillder question

Part 2 I wrote conditional macros to allow me to run the ?OS? under RT-11 as an application. This was the fastest way to debug logic errors. It didn?t do much for the hardware interfaces but it was better than debugging on the actual HW platform. -Steve Davidson SF:iP1 > On Apr 12, 2021, at 16:43, Steve Davidson <steve at davidson.net> wrote: > > ?When I was a DEC OEM we used RT-11 and LDA format to load our custom ?OS?. It was my first real project as a system developer. Made good money in those days... ? > > -Steve Davidson > > SF:iP1 > >> On Apr 12, 2021, at 16:17, Paul Koning <paulkoning at comcast.net> wrote: >> >> ? >> >>>> On Apr 12, 2021, at 4:09 PM, Johnny Billquist <bqt at softjar.se> wrote: >>> >>> Right. >>> When someone talks about the paper tape system, and absolute loader format, it is without any operating system underneath. It's just bare metal. And the absolute loader is just a simple format that can be read by a small program that you have in memory. It's only purpose is to read in a paper tape with the binary on it, and start that. >>> >>> So there are no system dependecies, there are no addressing issues. It's just actual bytes that will be written to specific addresses in memory, and then a jump to an address, and off it goes. >>> >>> Johnny >> >> BTW, SimH can load abs loader format files directly (with the "load" command). So you don't even need to feed it the abs loader to execute such programs. >> >> paul >> >>