# 74xx165 (Parallel load 8-bit Shift Register) **URL:** \ **Category:** Arcade\ **Created:** [November 16, 2019, 2:11pm UTC](https://forum.makecode.com/t/74xx165-parallel-load-8-bit-shift-register/789 "2019-11-16T14:11:19Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![204maker](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/204maker/32/447_2.png) [@204maker](https://forum.makecode.com/u/204maker)\ **Post date:** [November 16, 2019, 2:11pm UTC](https://forum.makecode.com/t/74xx165-parallel-load-8-bit-shift-register/789/1 "2019-11-16T14:11:19Z")
Can anyone here please share their experience using 74LS165 (Parallel load 8-bit Shift Register) for the buttons when designing an Arcade board? How are pin assignments made on the uf2 patcher? ---
**Author:** ![mmoskal](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/mmoskal/32/20_2.png) [@mmoskal](https://forum.makecode.com/u/mmoskal)\ **Post date:** [November 16, 2019, 5:45pm UTC](https://forum.makecode.com/t/74xx165-parallel-load-8-bit-shift-register/789/2 "2019-11-16T17:45:25Z")
You can see here: [https://github.com/microsoft/pxt-common-packages/blob/master/libs/buttons/buttons.cpp#L43](https://github.com/microsoft/pxt-common-packages/blob/master/libs/buttons/buttons.cpp#L43) We only support the H version right now and only on SAMD51. You can check pybadge config for example. PRs are welcome! ---
**Author:** ![mmoskal](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/mmoskal/32/20_2.png) [@mmoskal](https://forum.makecode.com/u/mmoskal)\ **Post date:** [November 16, 2019, 6:57pm UTC](https://forum.makecode.com/t/74xx165-parallel-load-8-bit-shift-register/789/3 "2019-11-16T18:57:17Z")
From my limited digging the HC and LS look similar but the HC is newer and somehow better. If needed we can enable the HC on STM as well. Let us know.