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Adopted push/pop notation

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Clanmaster21 2019-10-18 18:49:32 +01:00 committed by GitHub
parent 85cf733279
commit 370c3fa264
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1 changed files with 4 additions and 4 deletions
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8
kernel/sms/kbd.asm
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@ -19,7 +19,7 @@ smskbdFetchKCA:
; Port A TH output, low
ld a, 0b11011101
out (0x3f), a
push hl ; nop, pairs with a pop later
push hl ; nop, --> lvl 1
in a, (0xdc)
; bit 3:0 are our dest bits 3:0. handy...
and 0b00001111
@ -27,7 +27,7 @@ smskbdFetchKCA:
; Port A TH output, high
ld a, 0b11111101
out (0x3f), a
pop hl ; nop, and matches with push
pop hl ; nop, <-- lvl 1
in a, (0xdc)
; bit 3:0 are our dest bits 7:4
rlca \ rlca \ rlca \ rlca
@ -57,7 +57,7 @@ smskbdFetchKCB:
; Port B TH output, low
ld a, 0b01110111
out (0x3f), a
push hl ; nop, matches with pop later
push hl ; nop, --> lvl 1
in a, (0xdc)
; bit 7:6 are our dest bits 1:0
rlca \ rlca
@ -72,7 +72,7 @@ smskbdFetchKCB:
; Port B TH output, high
ld a, 0b11110111
out (0x3f), a
pop hl ; nop, matches earlier push
pop hl ; nop, <-- lvl 1
in a, (0xdc)
; bit 7:6 are our dest bits 5:4
rrca \ rrca