IEMIT - memory configurer
Note: To work directly with tstate and strobe setup values you must select the configuration "external" otherwise the values will be overwritten after any update. To print this page correct, you should enable "Print Background Colors and Images" under Page setup.
The IMS T400, T414, T425, T800 and the T805 transputer have a configurable external memory interface which allows a variety of types of memory devices to be connected using few components. For these transputers, the interface configuration may be selected by one of two mechanisms. The user may select one of the 17 standard (internal) memory configurations (13 for the T414) or a customised (external) memory configuration may be loaded from a ROM or PAL on reset.
Setup
External memory cycle
3 processor cycles, refresh every 14.4μs
| Tstate | T1 | T2 | T3 | T4 | T5 | T6 | ||
| ProcClockOut | ||||||||
| notMemS0 | ||||||||
| notMemS1 | 3 | |||||||
| notMemS2 | 1 | |||||||
| notMemS3 | 2 | |||||||
| notMemS4 | 3 | |||||||
| MemAD (read) | A | D | ||||||
| notMemRd | ||||||||
| MemAD (write) | A | D | ||||||
| notMemWrB0-3 | E | |||||||
| MemWait | -- | ---- | ---- | ---- | ---- | -- | ||
ROM table
#7FFFFF6C - 0 #7FFFFF90 - 0 #7FFFFFB4 - 0 #7FFFFFD8 - 1
#7FFFFF70 - 0 #7FFFFF94 - 0 #7FFFFFB8 - 0 #7FFFFFDC - 1
#7FFFFF74 - 0 #7FFFFF98 - 0 #7FFFFFBC - 0 #7FFFFFE0 - 0
#7FFFFF78 - 0 #7FFFFF9C - 1 #7FFFFFC0 - 0 #7FFFFFE4 - 0
#7FFFFF7C - 0 #7FFFFFA0 - 1 #7FFFFFC4 - 0 #7FFFFFE8 - 0
#7FFFFF80 - 0 #7FFFFFA4 - 0 #7FFFFFC8 - 1 #7FFFFFEC - 1
#7FFFFF84 - 0 #7FFFFFA8 - 0 #7FFFFFCC - 0 #7FFFFFF0 - 1
#7FFFFF88 - 0 #7FFFFFAC - 0 #7FFFFFD0 - 0 #7FFFFFF4 - 1
#7FFFFF8C - 0 #7FFFFFB0 - 1 #7FFFFFD4 - 0 #7FFFFFF8 - 0
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