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author Kirk Meyer <kirk.meyer@alpaxo.com>2025-01-30 06:26:04 -0700
committer GitHub <noreply@github.com>2025-01-30 08:26:04 -0500
commita56c5f8afa8a356516c69eca2f856ddb6c8e68aa (patch)
treebbdc33f617348e76f814c2bf3d39ebc4c1817719 /docs/source/commandline/commandline-index.rst
parentef9a3d7fe11f4c8b85fd3c768908a3ae50b5d801 (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.
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