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core: ibmpc: Add comments on stop bit of Z-150 AT

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tmk 2020-05-08 21:31:50 +09:00
parent 2a98bf516a
commit 27812520eb
1 changed files with 2 additions and 0 deletions
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tmk_core/protocol/ibmpc.c
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@ -293,6 +293,8 @@ ISR(IBMPC_INT_VECT)
case 0b01010000: case 0b01010000:
case 0b11010000: case 0b11010000:
// AT-done // AT-done
// DO NOT check stop bit. Zenith Z-150(AT) asserts stop bit as low for no reason.
// https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-AT-Keyboard-Protocol#zenith-z-150-beige
// TODO: parity check? // TODO: parity check?
isr_state = isr_state>>6; isr_state = isr_state>>6;
ibmpc_protocol = IBMPC_PROTOCOL_AT; ibmpc_protocol = IBMPC_PROTOCOL_AT;