Uploaded July 2024 | Updated September 2026, 3 weeks ago
This is my second video on the iPDS "Personal Development System", an EPROM programmer, emulation platform, and development system using the 8085 CPU -- actually it has two 8085 CPUs so you can run two programs at once. In my previous video, I built a "multimodule adapter" that allowed me to install an isbx-251 bubble memory. That left two slots left. So in this video I designed and built three new multimodules. These include an SP0256A-AL2 based speech synthesizers and sound boards using the SN76489 or AY-3-8910 sound chips. Because this system has two CPUs and was designed for multiprocessing, we can easily run two programs at once. I demonstrate running Conway's Game of Life on the B CPU while programming an EPROM on the A CPU. Then I leave Conway running while we try playing music from the 76489 and speech from the SP0256. For more vintage computer videos, see smbaker.com
This is my second video on the iPDS "Personal Development System", an EPROM programmer, emulation platform, and development system using the 8085 CPU -- actually it has two 8085 CPUs so you can run two programs at once. In my previous video, I built a "multimodule adapter" that allowed me to install an isbx-251 bubble memory. That left two slots left. So in this video I designed and built three new multimodules. These include an SP0256A-AL2 based speech synthesizers and sound boards using the SN76489 or AY-3-8910 sound chips. Because this system has two CPUs and was designed for multiprocessing, we can easily run two programs at once. I demonstrate running Conway's Game of Life on the B CPU while programming an EPROM on the A CPU. Then I leave Conway running while we try playing music from the 76489 and speech from the SP0256. For more vintage computer videos, see smbaker.com
