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author | 2025-01-30 06:26:04 -0700 | |
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committer | 2025-01-30 08:26:04 -0500 | |
commit | a56c5f8afa8a356516c69eca2f856ddb6c8e68aa (patch) | |
tree | bbdc33f617348e76f814c2bf3d39ebc4c1817719 /docs/source/commandline/commandline-index.rst | |
parent | ef9a3d7fe11f4c8b85fd3c768908a3ae50b5d801 (diff) |
Fixes for MC68EZ328 (#13286)
* MC68EZ328: Allow selection and use of Port A
On EZ and VZ, PASEL is reserved, and it was hard-coded to 0 (disabled).
However, the user manual notes: "In an 8-bit-only system, you can
configure these pins as a parallel I/O port by writing a 1 to the
WDTH8 bit of the SCR."
According to the MC68328 datasheet, something similar should be needed
to activate its Port B, but that change is not included here. Its PBSEL
is exposed, so there is likely no difference in emulation.
* MC68EZ328: Fuller implementation of timer
The existing implementation left the timer counter (TCN) at zero until
the compare value (TCMP) was reached. However, some software relies on
reading the TCN values to measure elapsed time.
The timer counter (TCN) now increments on every timer tick.
Diffstat (limited to 'docs/source/commandline/commandline-index.rst')
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