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tymcom-x [2017/11/28 09:50] jms [Hardware] |
tymcom-x [2022/05/12 07:42] (current) lars [Connection to the network] Host-Base interface emulation. |
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* **SIMH emulator, KS-2020** with disk and tape. This is the current host; see [[tymcom-x-simh|SIMH Setup]] page. | * **SIMH emulator, KS-2020** with disk and tape. This is the current host; see [[tymcom-x-simh|SIMH Setup]] page. | ||
- | Current plans: | + | ==== Current plans ==== |
- **Get system to boot.** | - **Get system to boot.** | ||
- **Get through '' | - **Get through '' | ||
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- **Login to emulated Base.** | - **Login to emulated Base.** | ||
- | Not in consideration | + | === Not in consideration |
* Emulate an LSI-11 with DR11 parallel interface. | * Emulate an LSI-11 with DR11 parallel interface. | ||
* Emulate Node Code on a microTymSat. | * Emulate Node Code on a microTymSat. | ||
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- Standard KI-10. Core memory was replaced by Ampex solid-state memory and the RH10 replaced by an Systems Concepts SA10 channel controller. The SA10 allowed the use of second hand IBM 3330-II disk drives and IBM tape drives. No terminals other than the CTY. | - Standard KI-10. Core memory was replaced by Ampex solid-state memory and the RH10 replaced by an Systems Concepts SA10 channel controller. The SA10 allowed the use of second hand IBM 3330-II disk drives and IBM tape drives. No terminals other than the CTY. | ||
- | - The original KL-10, set up like a KI-10, with external memory and DIA-10 I/O bus. It could not run on the Model-B backplane, internal MOS memory, or RH20 devices. | + | - The original KL-10, set up like a KI-10, with external memory and DIA-10 I/O bus. Once the diagnostics were accepted, the DEC memory, RH20 and RP06 would be disconnected and sold off. TYMCOM-X |
* A minor upgrade was to use IBM 3350 disk drives for additional storage. | * A minor upgrade was to use IBM 3350 disk drives for additional storage. | ||
* A more major upgrade was to treat the IBM 3352 disk drives as two logical 3350 devices, but with coordinated cylinder movement. | * A more major upgrade was to treat the IBM 3352 disk drives as two logical 3350 devices, but with coordinated cylinder movement. | ||
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==== Connection to the network ==== | ==== Connection to the network ==== | ||
- | TYMCOM-X (the PDP-10 system as a whole) doe not connect to TTYs (other than the Console). Instead, a Tymnet Node (known as a Base) does DMA to two circular buffers (IRING and ORING) in the PDP-10' | + | TYMCOM-X (the PDP-10 system as a whole) doe not connect to TTYs (other than the Console). Instead, a Tymnet Node (known as a Base) does DMA to/from two circular buffers (IRING and ORING) in the PDP-10' |
The Base-Host protocol is based on the Tymnet Circuit protocol, but designed to be delivered as 32-bit messages over a parallel connection. | The Base-Host protocol is based on the Tymnet Circuit protocol, but designed to be delivered as 32-bit messages over a parallel connection. | ||
- | The Base uses a pointer in low memory (IRP620) to write data into the IRING, then update the IRP620 modulo the ring size. The PDP-10 uses its pointer (IRPPDP) to read the IRING whenever the pointers differed. | + | The Base uses a pointer in low memory (IRP620) to write data into the IRING, then update the IRP620 modulo the ring size. The PDP-10 uses its pointer (IRPPDP) to read the IRING whenever the pointers differed. |
+ | Cornwell' | ||
+ | See https:// | ||
==== Host-Base protocol ==== | ==== Host-Base protocol ==== | ||
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==== Other pages ==== | ==== Other pages ==== | ||
- | [[tymcom-x|Overview]] page, [[tymcom-x-simh|SIMH Setup]] page, [[tymcom-x-startup|TYMCOM-X Startup]] page, [[tymcom-x-status|Status]] page. | + | [[tymcom-x|Overview]] page, [[tymcom-x-simh|SIMH Setup]] page, [[tymcom-x-startup|TYMCOM-X Startup]] page, [[tymcom-x-tape|TITO on disk]] page, [[tymcom-x-status|Status]] page. |