a2audit/audit/langcard.asm
2016-12-16 22:35:28 -05:00

189 lines
4.7 KiB
NASM

;;; Apple II Language Card audit routines
;;; Copyright © 2016 Zellyn Hunter <zellyn@gmail.com>
!zone langcard {
lda MEMORY
cmp #49
bcs +
+print
!text "48K:SKIPPING LANGUAGE CARD TEST",$8D
+printed
beq .done2
;; Setup - store differing values in bank first and second banked areas.
+ lda $C08B ; Read and write First 4K bank
lda $C08B
lda #$55
sta $D17B ; D17B is $53 in Apple II/plus/e/enhanced
cmp $D17B
beq +
+prerr $0003 ;; E0003: We tried to put the language card into read bank 1, write bank 1, but failed to write.
!text "CANNOT WRITE TO LC BANK 1 RAM"
+prerred
beq .done2
+ sta $FE1F ; FE1F is $60 in Apple II/plus/e/enhanced
cmp $FE1F
beq +
+prerr $0004 ;; E0004: We tried to put the language card into read RAM, write RAM, but failed to write.
!text "CANNOT WRITE TO LC RAM"
+prerred
beq .done2
+ lda $C083 ; Read and write Second 4K bank
lda $C083
lda #$AA
sta $D17B
cmp $D17B
beq +
+prerr $0005 ;; E0005: We tried to put the language card into read bank 2, write bank 2, but failed to write.
!text "CANNOT WRITE TO LC BANK 2 RAM"
+prerred
beq .done2
;; Test that we're reading the right things
+ lda $C088 ; RAM read, bank 1
lda $D17B
cmp #$55
beq ++
cmp #$AA
bne +
+prerr $0006 ;; E0006: Read $C088 (read bank 1), but the language card is still reading bank 2.
!text "$C088: BANK 2 ACTIVE"
+prerred
.done2 beq .done3
+ cmp #$53
bne +
+prerr $0007 ;; E0007: Read $C088 (read bank 1), but the language card is reading ROM.
!text "$C088: ROM ACTIVE"
+prerred
beq .done3
+ +prerra $0008 ;; E0008: Read $C088 (read bank 1), but the check byte ($D17B) is an unknown value.
!text "$C088: UNKNOWN BYTE"
+prerred
beq .done3
++ dec $D17B
eor $D17B
beq +
+prerr $0009 ;; E0009: Read $C088 (read bank 1, write-protected), but successfully wrote byte ($D17B).
!text "$C088: ALLOWED WRITE"
+prerred
beq .done3
+ lda $C080 ; RAM read, bank 2
lda $D17B
cmp #$AA
beq ++
cmp #$55
bne +
+prerr $000A ;; E000A: Read $C080 (read bank 2), but the language card is still reading bank 1.
!text "$C080: BANK 1 ACTIVE"
+prerred
beq .done3
+ cmp #$53
bne +
+prerr $000B ;; E000B: Read $C080 (read bank 2), but the language card is reading ROM.
!text "$C080: ROM ACTIVE"
+prerred
beq .done3
+ +prerra $000C ;; E000C: Read $C080 (read bank 2), but the check byte ($D17B) is an unknown value.
!text "$C080: UNKNOWN BYTE"
+prerred
.done3 beq .done4
++ dec $D17B
eor $D17B
beq +
+prerr $000D ;; E000D: Read $C080 (read bank 2, write-protected), but successfully wrote byte ($D17B).
!text "$C080: ALLOWED WRITE"
+prerred
beq .done4
+ lda $C081 ; ROM read
lda $D17B
cmp #$53
beq ++
cmp #$55
bne +
+prerr $000E ;; E000E: Read $C081 (read ROM), but the language card is still reading bank 1.
!text "$C081: BANK 1 ACTIVE"
+prerred
beq .done4
+ cmp #$AA
bne +
+prerr $000F ;; E000F: Read $C081 (read ROM), but the language card is reading bank 2.
!text "$C081: BANK 1 ACTIVE"
+prerred
beq .done
+ +prerra $0010 ;; E0010: Read $C081 (read ROM), but the check byte ($D17B) is an unknown value.
!text "$C081: UNKNOWN BYTE"
+prerred
beq .done
++ dec $D17B
eor $D17B
beq +
+prerr $0011 ;; E0011: Read $C081 (read ROM), but successfully modified byte ($D17B).
!text "$C081: ALLOWED WRITE"
+prerred
beq .done
+ lda $C089 ; ROM read
lda $D17B
cmp #$53
beq ++
cmp #$55
bne +
+prerr $0012 ;; E0012: Read $C089 (read ROM), but the language card is still reading bank 1.
!text "$C089: BANK 1 ACTIVE"
+prerred
beq .done
+ cmp #$AA
bne +
+prerr $0013 ;; E0013: Read $C089 (read ROM), but the language card is reading bank 2.
!text "$C089: BANK 1 ACTIVE"
+prerred
beq .done
+ +prerra $0014 ;; E0014: Read $C089 (read ROM), but the check byte ($D17B) is an unknown value.
!text "$C089: UNKNOWN BYTE"
+prerred
beq .done
++ dec $D17B
eor $D17B
beq +
+prerr $0015 ;; E0015: Read $C089 (read ROM), but successfully modified byte ($D17B).
!text "$C089: ALLOWED WRITE"
+prerred
.done4 beq .done
+ lda $C08B ; RAM read, bank 1
lda $D17B
cmp #$55
beq ++
cmp #$AA
bne +
+prerr $0016 ;; E0016: Read $C08B (read bank 1), but the language card is still reading bank 2.
!text "$C08B: BANK 2 ACTIVE"
+prerred
beq .done
+ cmp #$53
bne +
+prerr $0017 ;; E0017: Read $C08B (read bank 1), but the language card is reading ROM.
!text "$C08B: ROM ACTIVE"
+prerred
beq .done
+ cmp #$54
bne +
+prerr $0018 ;; E0018: Read $C08B (read bank 1), but byte was previously decremented during single-read $C089 or $C081 phase, which should have Write-protected RAM.
!text "$C08B: PREVIOUS WRITE SUCCEEDED"
+prerred
beq .done
+ +prerra $0019 ;; E0019: Read $C08B (read bank 1), but the check byte ($D17B) is an unknown value.
!text "$C08B: UNKNOWN BYTE"
+prerred
beq .done
++
;; Success
+print
!text "LANGUAGE CARD TESTS SUCCEEDED",$8D
+printed
.done
} ;langcard