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Comment RWTS
This commit is contained in:
Michaelangel007
parent
aac293f157
commit
71eb47b599
261
README.md
261
README.md
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@ -699,7 +699,7 @@ I'll use the prefix:
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B055:EA NOP
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DataProlog2:
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B056:BD 8C C0 LDA DRIVE_DATA,X
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B059:10 FB BPL DataProlog2 ;^ $B056
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B059:10 FB BPL DataProlog2 ;^ $B056
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B05B:C9 AA CMP #$AA
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B05D:D0 F2 BNE ;^ $B051
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@ -716,7 +716,7 @@ I'll use the prefix:
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B0E3:68 PLA
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B0E4:A0 55 LDY #$55
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B0E6:91 E6 STY (rwts_LoadAddr),Y
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B0E8:60 RTS ; TODO: VERIFY BYTE
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B0E8:60 RTS
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Do_Seek:
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B0E9:0A ASL
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@ -751,7 +751,7 @@ I'll use the prefix:
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B113:A5 FF LDA rwts_HalfTrack_Have
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B115:29 03 AND #PHASE_MASK
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B117:0A ASL
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B118:05 FD ORA $FD ; TODO: FIXME rwts_drive_on ??
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B118:05 FD ORA $rwts_SlotX16
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B11A:A8 TAY
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B11B:B9 81 C0 LDA PHASE0_ON,Y
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B11E:60 RTS
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@ -759,28 +759,45 @@ I'll use the prefix:
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B11F:A9 28 LDA #$28
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B121:4C 16 B4 JMP _Wait
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LostPrologue:
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B124:38 SEC
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B125:60 RTS
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RWTS_ReadPrologue
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B126:A0 FC LDY #$FC ; save Sector $E3
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B128:84 EB STY $EB
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B128:84 EB STY $EB ; TODO rwts_find
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FindAddr:
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B12A:C8 INY
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B12B:D0 04 INC $EB
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B12F:F0 F3 BEQ ;^ $B124
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B12F:F0 F3 BEQ LostPrologue ;^ $B124
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AddrProlog1:
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B131:BD 8C C0 LDA DRIVE_DATA,X
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B134:10 FB BPL AddrProlog1
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TestProlog1:
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B136:C9 D5 CMP #$D5
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B138:D0 F0 BNE ;^ $B12A
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B138:D0 F0 BNE FindAddr ;^ $B12A
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B13A:EA NOP
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AddrProlog2:
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B13B:BD 8C C0 LDA DRIVE_DATA,X
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B13E:10 FB BPL AddrProlog2
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TestProlog2:
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B140:C9 AA CMP #$AA
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B142:D0 F2 BNE TestProlgo1 ;^ $B136
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B144:A0 03 LDY #$03 ; Vol, Track, Sector, Checksum
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B140:CMP #$AA
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B14B:CMP #$96
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AddrProlog3:
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B146:BD 8C C0 LDA DRIVE_DATA,X
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B149:10 FB BPL AddrProlog3
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B14B:C9 96 CMP #$96
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B14D:D0 E7 BNE TestProlog1 ;^ $B136
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B14F:A9 00 LDA #$00
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B151:85 EC STA $EC
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AddrVTSC:
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B153:BD 8C C0 LDA DRIVE_DATA,X
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B156:10 FB BPL AddrVTSC
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B158:2A ROL
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B159:85 EB STA $EB
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B15B:BD 8C C0 LDA DRIVE_DATA,X
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B15E:10 FB BPL ;^ $B15B
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B160:25 EB AND $EB
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@ -909,25 +926,33 @@ I'll use the prefix:
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B2F8:01 03 03 FE DFB $01,$03,$03,$FE ; [3E]
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B2FC:03 03 03 FF DFB $03,$03,$03,$FF ; [3F]
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TODO: FIXME: Convert ProDOS Block # to Sector # ?
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B300:48 PHA
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B301:29 07 AND #$07
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B303:8D 19 B3 STA _B319
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B306:68 PLA
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B307:6A ROR
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B308:4A LSR
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B309:4A LSR
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B30A:C5 ED CMP $ED ; TODO
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B30C:F0 0A BEQ ;v $B318
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RWTS_GetProDosSectors:
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B300:48 PHA ; === T15S3 ===
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B301:29 07 AND #$07 ; A = 0000_0fgh
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B303:8D 19 B3 STA SectorProDOS+1 ; *** SELF-MODIFYING! ProDOS Block = Sectors XX and YY
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B306:68 PLA ; A = abcd_efgh
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B307:6A ROR ; A = 0abc_defg C=h
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B308:4A LSR ; A = 00ab_cdef
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B309:4A LSR ; A = 000a_bcde
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B30A:C5 ED CMP rwts_Track
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B30C:F0 0A BEQ SectorProDOS ;v $B318 On correct ProDOS Track
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B30E:48 PHA
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B30F:20 33 B3 JSR RWTS_Read16 ; TODO: FIXME
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B312:20 9E B3 JSR RWTS_B39E ; TODO: FIXME
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B30F:20 33 B3 JSR RWTS_Read16
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B312:20 9E B3 JSR RWTS_UnloadSectors
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B315:68 PLA
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B316:85 ED STA $ED
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B318:A0 00 LDY #$00
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B316:85 ED STA rwts_Track
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...
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SectorProDOS:
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B318:A0 00 LDY #$00 ; *** SELF-MODIFIED by $B303
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B31A:Be B9 B3 LDX rwts_SectorsProDOS,Y ; First Half of Block
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B31D:AD EA B3 LDA rwts_DestAddr+1
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B320:EE EA B3 INC rwts_DestAddr+1 ; store at next page
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B323:9D C9 B3 STA rwts_SectorLoadOrder,X
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B326:BE C1 B3 LDX rwts_SectorProDOS+8,Y ; Second Half of Block
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B329:AD EA B3 LDA rwts_DestAddr+1
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B32C:EE EA B3 INC rwts_DestAddr+1
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B32F:9D C9 B3 STA rwts_SectorLoadOrder+8,X
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B332:60 RTS
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RWTS_Read16:
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B333:A2 0F LDX #$0F ; 16 sectors to load
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@ -949,14 +974,14 @@ TODO: FIXME: Convert ProDOS Block # to Sector # ?
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B34D:20 26 B1 JSR RWTS_ReadPrologue
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B350:B0 F7 BCS AttemptRead ;^ $B349
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B352:A5 E4 LDA $E4
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B354:C5 ED CMP $ED
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B354:C5 ED CMP rwts_Track
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B356:D0 39 BNE ;v $B391
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B358:A4 E3 LDY rwts_SectorHave
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B35A:B9 D9 B3 LDA rwts_SectorDestAddr,Y
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B35D:F0 EA BEQ AttemptRead ;^ $B349, already read this sector?
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B35F:85 E7 STA rwts_LoadAddr+1
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B361:AD E9 B3 LDA rwts_DestAddrLow
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B361:AD E9 B3 LDA rwts_DestAddr
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B364:85 E6 STA rwts_LoadAddr
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B366:20 11 B0 JSR RWTS_ReadSector
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B369:B0 DE BCS AttemptRead ;^ $B349
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@ -975,7 +1000,8 @@ TODO: FIXME: Convert ProDOS Block # to Sector # ?
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ReadError
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B37E:38 SEC
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B37F:EA NOP ; *** SELF-MODIFIED to be RTS $60 @ $ TODO
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ReadSound:
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B37F:EA NOP ; *** SELF-MODIFIED to be RTS $60 @ $B464
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B380:A0 00 LDY #$00 ; Br0derbund "ZAP" sound
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^1
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B382:AD 30 C0 LDA SQUEEKER
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@ -990,81 +1016,99 @@ TODO: FIXME: Convert ProDOS Block # to Sector # ?
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B391:A5 E4 LDA $E4 ; TODO
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B393:0A ASL
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B394:85 FF STA
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B396:A5 ED LDA $ED
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B394:85 FF STA rwts_HalfTrack_Have
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B396:A5 ED LDA rwts_Track
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B398:20 E9 B0 JSR Do_Seek
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B39B:4C 33 B3 JMP Read16Sectors
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B39E:A0 0F LDY #$0F ; 16 Sectors to load -- TODO: CALLED from $B312
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RWTS_UnloadSectors ; Called @ $B312
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B39E:A0 0F LDY #$0F ; 16 Sectors to load -- TODO: CALLED from $B312
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B3A0:A9 00 LDA #$00
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MakeSectorUnloaded
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B3A2:99 C9 B3 STA rwts_SectorLoadOrder,Y
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B3A5:88 DEY
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B3A6:10 FA BPL MakeSectorUnloaded ;^ $B3A2
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B3A8:60 RTS
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rwts_Logical2Physical_A ; Map Logical->Physical Sectors
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; ProDOS order?? TODO
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; Map Logical Sectors -> Physical Sectors
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rwts_SectorsDOS33:
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B3A9:00 07 0E 06 DFB $0,$7,$E,$6,$D,$5,$C,$4
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B3AD:0D 05 0C 04
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B3B1:0B 03 0A 02 DFB $B,$3,$A,$2,$9,$1,$8,$F
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B3B5:09 01 08 0F
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rwts_Logical2Physical_B ; Map Logical->Physical Sectors
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; DOS order?? TODO
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; Map Logical Blocks -> Physical Sectors
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; const uint_8 BlockToSectorProDOS[16]
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rwts_SectorsProDOS:
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B3B9:00 0D 0B 09 DFB $0,$D,$B,$9,$7,$5,$3,$1
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B3BD:07 05 03 01
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B3C1:0E 0C 0A 08 DFB $E,$C,$A,$8,$6,$4,$2,$F
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B3C5:06 04 02 0F
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; One of the above tables is copied here
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rwts_SectorLoadOrder:
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B3C9:00 00 00 00
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B3CD:00 00 00 00
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B3D1:00 00 00 00
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B3D5:00 00 00 00
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; This is a scatter-gather read!
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; 00 = finished loading this page
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; xx = Dest Page to load at
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; uint_8 DestAddr[ 16 ];
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rwts_SectorDestAddr:
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B3D9:00 00 00 00
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B3DD:00 00 00 00
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B3E1:00 00 00 00
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B3E5:00 00 00 00
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rwts_DestAddrLow:
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rwts_DestAddr:
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B3E9:00 DFB $00
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B3EA:00 DFB $00
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B3EB:00 rwts_B3EB DFB $00 ; TODO
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B3EC:00 rwts_B3EC DFB $00 ; TODO
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; ====================
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; Y = Track
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; JSR RWTS_B003
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; DFB Load Address 0
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; DFB Load Address 1
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; DFB Load Address 2
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; DFB Load Address 3
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; DFB Load Address 4
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; DFB Load Address 5
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; DFB Load Address 6
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; DFB Load Address 7
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; DFB Load Address 8
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; DFB Load Address 9
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; DFB Load Address A
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; DFB Load Address B
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; DFB Load Address C
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; DFB Load Address D
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; DFB Load Address E
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; DFB Load Address F
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; DFB Load Address Sector 0
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; DFB Load Address Sector 1
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; DFB Load Address Sector 2
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; DFB Load Address Sector 3
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; DFB Load Address Sector 4
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; DFB Load Address Sector 5
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; DFB Load Address Sector 6
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; DFB Load Address Sector 7
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; DFB Load Address Sector 8
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; DFB Load Address Sector 9
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; DFB Load Address Sector A
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; DFB Load Address Sector B
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; DFB Load Address Sector C
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; DFB Load Address Sector D
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; DFB Load Address Sector E
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; DFB Load Address Sector F
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; ====================
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Do_LoadCode:
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B3ED:84 ED STY rwts_ED
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B3ED:84 ED STY rwts_Track
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B3EF:68 PLA
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B3F0:85 EB STA rwts_Return
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B3F2:68 PLA
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B3F3:85 EC STA rwts_Return+1
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B3F5:A2 00 LDX #$00
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RWTS_Load
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B3F7:20 0B B4 JSR NextByte
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B3FA:9D C9 B3 STA $B3C9,X
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GetInterleave
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B3F7:20 0B B4 JSR GetNextAddr
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B3FA:9D C9 B3 STA rwts_SectorLoadOrder,X
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B3FD:E8 INX
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B3FE:E0 10 CPX #$10
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B400:90 F5 BCC ;^ $B3F7
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B402:A5 EC LDA rwts_Return
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B400:90 F5 BCC GetInterleave ;^ $B3F7, === T15S4 ===
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B402:A5 EC LDA rwts_Return ; Restore caller
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B404:48 PHA
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B405:A5 EB LDA rwts_Return+1
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B407:48 PHA
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B408:4C 33 B3 JMP RWTS_Read16 ;^ $B333
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NextByte:
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GetNextAddr:
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B40B:E6 EB INC rwts_Return
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B40D:D0 02 BNE GetByte ; roll over to next page?
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B40F:E6 EC INC rwts_Return+1
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@ -1073,11 +1117,98 @@ TODO: FIXME: Convert ProDOS Block # to Sector # ?
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B413:B1 EB LDY (rwts_Return),Y
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B415:60 RTS
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RWTS_Delay:
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B416:38 SEC ; C=1 before subtract
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BusyWait1
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B417:48 PHA
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BusyWait2:
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B418:E9 01 SBC #$01
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B41A:D0 FC BNE BusyWait2 ;^ $B418
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B41C:68 PLA
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B41D:E9 01 SBC #$01
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B41F:D0 F6 BNE BusyWait1 ;^ $B417
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B421:60 RTS
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; ====================
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;
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; Load @ $A,Y
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; A = Mem Hi
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; Y = Mem Lo
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; X = Num of ProDOS Blocks ?
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; ====================
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B451:
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Do_LoadBlocks:
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B422:8C E9 B3 STY rwts_DestAddr
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B425:8D EA B3 STA rwts_DestAddr+1
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B428:8E EB B3 STX rwts_B3EB
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B42B:20 9E B3 JSR RWTS_UnloadSectors
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B42E:A0 00 LDY #$00
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B430:8C EC B3 STY rwts_B3EC
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ReadBlock
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B433:AC EC B3 LDY rwts_B3EC
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B436:E6 01 INC $01
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B438:B1 00 LDA ($00),Y ; A=???
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B43A:4A LSR ; C=even
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B43B:C6 01 DEC $01
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B43D:B1 00 LDA ($00),Y
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B43F:B0 02 BCS ;v $B443 >= ?
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B441:F0 0B BEQ ;v $B44E == done
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B443:20 00 B3 JSR RWTS_GetProDosSectors
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B446:EE EC B3 INC rwts_B3EC
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B449:CE EB B3 DEC rwts_B3EB
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B44C:D0 E5 BNE ReadBlock ;^ $B433
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JumpRead16:
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B44E:4C 33 B3 JMP RWTS_Read16
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; ====================
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; A = Dest Address
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; Y = Source Track
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; ====================
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Do_ReadTrack:
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B451:84 ED STY rwts_Track
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B453:A0 00 LDY #$00
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NextSector:
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B455:99 C9 B3 STA rwts_SectorLoadOrder,Y
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B458:18 CLC
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B459:69 01 ADC #$01 ; Fill memory in sequential sector order
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B45B:C8 INY
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B45C:C0 10 CPY #$10 ; Finished 16 sectors?
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B45E:90 F5 BCC NextSector ;^ $B455
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B460:B0 EC BCS JumpRead16 ;^ $B44E, always
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; ====================
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; A = Dest Address
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; Y = Source Track
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; ====================
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Do_ReadTrackQuiet:
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B462:A2 60 LDX #$60 ; $60 = RTS
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B464:8E 7F B3 STX ReadSound ; Disable SFX ZAP for bad read
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B467:20 51 B4 JSR RWTS_B451
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B46A:A9 EA LDA #$EA ; $EA = NOP
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B46C:8D 7F B3 STA ReadSound ; Re-enable SFZ ZAP for bad read
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B46F:60
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DS $B500-* ; unused/wasted
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B470:0 0 0 0 0 0 0 0
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B478:0 0 0 0 0 0 0 0
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B480:0 0 0 0 0 0 0 0
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B488:0 0 0 0 0 0 0 0
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B490:0 0 0 0 0 0 0 0
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B498:0 0 0 0 0 0 0 0
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B4A0:0 0 0 0 0 0 0 0
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B4A8:0 0 0 0 0 0 0 0
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B4B0:0 0 0 0 0 0 0 0
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B4B8:0 0 0 0 0 0 0 0
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B4C0:0 0 0 0 0 0 0 0
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B4C8:0 0 0 0 0 0 0 0
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B4D0:0 0 0 0 0 0 0 0
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B4D8:0 0 0 0 0 0 0 0
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B4E0:0 0 0 0 0 0 0 0
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B4E8:0 0 0 0 0 0 0 0
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B4F0:0 0 0 0 0 0 0 0
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B4F8:0 0 0 0 0 0 0 0
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B500:
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B568:60 RTS
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B569:00 00 00
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@ -1150,6 +1281,8 @@ TODO: FIXME: Convert ProDOS Block # to Sector # ?
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B7F8:0 0 0 0 0 0 0 0
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```
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Whew!
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# Boot Tracing Stage 2
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