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small C128 keyboard handling optimization

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FeralChild64 committed 2019-10-16 20:24:47 +02:00
1 parent fb2e13f9a9
commit a7cb7eb52e
2 files changed
+2 -8
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CONFIG.md
+1 -1
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@@ -119,7 +119,7 @@ Needs 70-250 more space in KERNAL segment (depending on the features enabled for
Allows to use additional keys found on the C128 keyboard. Allows to use additional keys found on the C128 keyboard.
Needs 128 bytes more space in KERNAL segment. If unsure - disable. Needs about 125 bytes more space in KERNAL segment. If unsure - disable.
### `CONFIG_KEY_REPEAT_DEFAULT` ### `CONFIG_KEY_REPEAT_DEFAULT`
c64/kernal/keyboard/scnkey_128.s
+1 -7
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@@ -37,6 +37,7 @@ scnkey_matrix_128_loop_inner:
tya // now .A contains key offset within a row tya // now .A contains key offset within a row
clc clc
adc kb_matrix_row_offsets, x // now .A contains key offset from the matrix start adc kb_matrix_row_offsets, x // now .A contains key offset from the matrix start
adc #$40 // now .A contains fully normalized offset
tay tay
jmp scnkey_matrix_128_loop_next jmp scnkey_matrix_128_loop_next
!: !:
@@ -52,13 +53,6 @@ scnkey_matrix_128_loop_next:
cpy #$FF cpy #$FF
beq scnkey_128_done beq scnkey_128_done
// Shift the matrix code
clc
tya
adc #$40
tay
// Continue with C64 keyboard scanning // Continue with C64 keyboard scanning
scnkey_128_done: scnkey_128_done: