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Remove command flags and just write nibbles

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This commit is contained in:
Terence Boldt 2020-12-09 03:38:57 +00:00
parent 2f54c217ca
commit c034314e7a
2 changed files with 60 additions and 86 deletions
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17
Firmware/Driver.asm
View File

@ -70,7 +70,7 @@ GetStatus:
; ProDOS Read Block Command
ReadBlock:
lda #ReadBlockCommand
jsr SendCommand
jsr SendByte
lda BlockLo
jsr SendByte
lda BlockHi
@ -94,7 +94,7 @@ read256:
; ProDOS Write Block Command
WriteBlock:
lda #WriteBlockCommand
jsr SendCommand
jsr SendByte
lda BlockLo
jsr SendByte
lda BlockHi
@ -115,19 +115,6 @@ write256:
bne write256
rts
SendCommand:
ora #$D0 ;Write Hi, Read Hi, Command Write Lo, Command Read Hi
sta OutputByte
commandWait:
lda InputByte
asl
asl
asl
bmi commandWait
lda #$F0 ;set write/read/command flags high
sta OutputByte
rts
SendByte:
pha
lsr

129
Firmware/Driver.lst
View File

@ -1,4 +1,4 @@
ca65 V2.18 - Ubuntu 2.18-1
ca65 V2.19 - Git 59c58acb
Main file : Driver.asm
Current file: Driver.asm
@ -74,11 +74,11 @@ Current file: Driver.asm
001038 1 ; ProDOS Read Block Command
001038 1 ReadBlock:
001038 1 A9 01 lda #ReadBlockCommand
00103A 1 20 88 10 jsr SendCommand
00103A 1 20 88 10 jsr SendByte
00103D 1 A5 46 lda BlockLo
00103F 1 20 9B 10 jsr SendByte
00103F 1 20 88 10 jsr SendByte
001042 1 A5 47 lda BlockHi
001044 1 20 9B 10 jsr SendByte
001044 1 20 88 10 jsr SendByte
001047 1 A0 00 ldy #$0
001049 1 20 57 10 jsr read256
00104C 1 E6 45 inc BufferHi
@ -89,7 +89,7 @@ Current file: Driver.asm
001056 1 60 rts
001057 1
001057 1 read256:
001057 1 20 BE 10 jsr GetByte
001057 1 20 AB 10 jsr GetByte
00105A 1 91 44 sta (BufferLo),y
00105C 1 C8 iny
00105D 1 D0 F8 bne read256
@ -98,11 +98,11 @@ Current file: Driver.asm
001060 1 ; ProDOS Write Block Command
001060 1 WriteBlock:
001060 1 A9 02 lda #WriteBlockCommand
001062 1 20 88 10 jsr SendCommand
001062 1 20 88 10 jsr SendByte
001065 1 A5 46 lda BlockLo
001067 1 20 9B 10 jsr SendByte
001067 1 20 88 10 jsr SendByte
00106A 1 A5 47 lda BlockHi
00106C 1 20 9B 10 jsr SendByte
00106C 1 20 88 10 jsr SendByte
00106F 1 A0 00 ldy #$0
001071 1 20 7F 10 jsr write256
001074 1 E6 45 inc BufferHi
@ -114,72 +114,59 @@ Current file: Driver.asm
00107F 1
00107F 1 write256:
00107F 1 B1 44 lda (BufferLo),y
001081 1 20 9B 10 jsr SendByte
001081 1 20 88 10 jsr SendByte
001084 1 C8 iny
001085 1 D0 F8 bne write256
001087 1 60 rts
001088 1
001088 1 SendCommand:
001088 1 09 D0 ora #$D0 ;Write Hi, Read Hi, Command Write Lo, Command Read Hi
00108A 1 8D DD C0 sta OutputByte
00108D 1 commandWait:
00108D 1 AD DE C0 lda InputByte
001090 1 0A asl
001091 1 0A asl
001092 1 0A asl
001093 1 30 F8 bmi commandWait
001095 1 A9 F0 lda #$F0 ;set write/read/command flags high
001097 1 8D DD C0 sta OutputByte
00109A 1 60 rts
00109B 1
00109B 1 SendByte:
00109B 1 48 pha
00109C 1 4A lsr
00109D 1 4A lsr
00109E 1 4A lsr
00109F 1 4A lsr
0010A0 1 20 A8 10 jsr SendNibble
0010A3 1 68 pla
0010A4 1 20 A8 10 jsr SendNibble
0010A7 1 60 rts
0010A8 1
0010A8 1 SendNibble:
0010A8 1 29 0F and #$0F
0010AA 1 09 70 ora #$70 ;Write bit low
0010AC 1 48 pha
0010AD 1 waitWrite:
0010AD 1 AD DE C0 lda InputByte
0010B0 1 0A asl ;Second highest bit goes low when ready
0010B1 1 30 FA bmi waitWrite
0010B3 1 68 pla
0010B4 1 8D DD C0 sta OutputByte
0010B7 1 finishWrite:
0010B7 1 AD DE C0 lda InputByte
0010BA 1 0A asl
0010BB 1 10 FA bpl finishWrite
001088 1 SendByte:
001088 1 48 pha
001089 1 4A lsr
00108A 1 4A lsr
00108B 1 4A lsr
00108C 1 4A lsr
00108D 1 20 95 10 jsr SendNibble
001090 1 68 pla
001091 1 20 95 10 jsr SendNibble
001094 1 60 rts
001095 1
001095 1 SendNibble:
001095 1 29 0F and #$0F
001097 1 09 70 ora #$70 ;Write bit low
001099 1 48 pha
00109A 1 waitWrite:
00109A 1 AD DE C0 lda InputByte
00109D 1 0A asl ;Second highest bit goes low when ready
00109E 1 30 FA bmi waitWrite
0010A0 1 68 pla
0010A1 1 8D DD C0 sta OutputByte
0010A4 1 finishWrite:
0010A4 1 AD DE C0 lda InputByte
0010A7 1 0A asl
0010A8 1 10 FA bpl finishWrite
0010AA 1 60 rts
0010AB 1
0010AB 1 GetByte:
0010AB 1 20 BE 10 jsr GetNibble
0010AE 1 0A asl
0010AF 1 0A asl
0010B0 1 0A asl
0010B1 1 0A asl
0010B2 1 85 1D sta NibbleStorage
0010B4 1 20 BE 10 jsr GetNibble
0010B7 1 29 0F and #$0f
0010B9 1 05 1D ora NibbleStorage
0010BB 1 A5 1D lda NibbleStorage
0010BD 1 60 rts
0010BE 1
0010BE 1 GetByte:
0010BE 1 20 D1 10 jsr GetNibble
0010C1 1 0A asl
0010C2 1 0A asl
0010C3 1 0A asl
0010C4 1 0A asl
0010C5 1 85 1D sta NibbleStorage
0010C7 1 20 D1 10 jsr GetNibble
0010CA 1 29 0F and #$0f
0010CC 1 05 1D ora NibbleStorage
0010CE 1 A5 1D lda NibbleStorage
0010D0 1 60 rts
0010D1 1
0010D1 1 GetNibble:
0010D1 1 A9 B0 lda #$b0 ;set read flag low
0010D3 1 8D DD C0 sta OutputByte
0010D6 1 waitRead:
0010D6 1 AD DE C0 lda InputByte
0010D9 1 30 FB bmi waitRead
0010DB 1 29 F0 and #$f0 ;set all flags high
0010DD 1 8D DD C0 sta OutputByte
0010E0 1 60 rts
0010E1 1
0010E1 1
0010BE 1 GetNibble:
0010BE 1 A9 B0 lda #$b0 ;set read flag low
0010C0 1 8D DD C0 sta OutputByte
0010C3 1 waitRead:
0010C3 1 AD DE C0 lda InputByte
0010C6 1 30 FB bmi waitRead
0010C8 1 29 F0 and #$f0 ;set all flags high
0010CA 1 8D DD C0 sta OutputByte
0010CD 1 60 rts
0010CE 1
0010CE 1