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--- blog:transputer_tmb08_repair [2020/12/09 08:18] – [IO Speed Tuning] john
+++ blog:transputer_tmb08_repair [2020/12/09 08:29] (current) – [IO Speed Tuning] john
@@ Line 132: / Line 132: @@
 {{:blog:tmb08_io_tuning.png?700|}}
-The biggest increase in IO speed comes from both increasing the ISA clock from the standard 8MHz (bus / 4) to 11MHz (bus / 3), which gains an additional **34KBytes/sec**, as well as decreasing the IO recovery time from the standard 8 cycles to 5 cycles, giving us another **32-33KBytes/sec**. Further decreases to the IO recovery time below 5 cycles __do not__ show any improvement.
+The first increase in IO speed comes from both increasing the ISA clock from the standard 8MHz (bus / 4) to 11MHz (bus / 3), which gains an additional **22-24KBytes/sec**, as well as decreasing the IO recovery time from the standard 8 cycles to 5 cycles, giving us another **32-33KBytes/sec**. Further decreases to the IO recovery time below 5 cycles __do not__ show any improvement.
 CPU level 1 and motherboard level 2 caches are already optimal (write-back supported on both) and memory timings are already set correctly for the type and speed of the modules installed, so there are no further gains to be made there.
-Still, the overall improvement from the base setting is approximately **65KBytes/sec**. __Taking us from 279KBytes/sec to 333KBytes/sec__.
+Still, the overall improvement from the base setting is approximately **55-56KBytes/sec**. __Taking us from 270-280KBytes/sec to 333KBytes/sec__.
 ===== Transputer Network Configuration =====