On Wed, Jul 26, 2017 at 3:09 PM, Ed Sharpe <couryho...@aol.com> wrote:
> thanks that gives me a better understanding Charles in one chunk of my > knowledge that had a hole in it! > You're welcome. Tying all of this back to the dps8m emulator.... the emulator originally emulated the DPS8/M. As part of the LCM panel project, it was extended to support the 6180 as well; no major functional differences, but the size and count of various subsystems were adjusted to match the panels expectations. Eight ports instead of four, different interpretation of the SCU memory size switches, 16 history register entries instead of 64, different history register layout and the like. The emulator should be able to emulate the 635 with very few tweaks; mostly making the 645 specific instructions and addressing modes illegal. Unfortunately, there seems to be a real dearth of 635 software out there. GECOS has never been publically released (and in fact the current version is still a commercial product). I believe that Dartmouth Time Sharing System (DTSS) ran for a bit on a 635, but my inquires to the DTSS restorers have not yielded any response. -- Charles >
