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a2audit/audit/langcard.asm
Zellyn Hunter b2c77674e4 fix false read test
2017-04-24 21:42:31 -04:00

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;;; Apple II Language Card audit routines
;;; Copyright © 2016 Zellyn Hunter <zellyn@gmail.com>
!zone langcard {
.checkdata = tmp1
LANGCARDTESTS
lda #0
sta LCRESULT
lda MEMORY
cmp #49
bcs LANGCARDTESTS_NO_CHECK
+print
!text "48K:SKIPPING LANGUAGE CARD TEST",$8D
+printed
sec
rts
LANGCARDTESTS_NO_CHECK:
+print
!text "TESTING LANGUAGE CARD",$8D
+printed
;; Setup - store differing values in bank first and second banked areas.
lda $C08B ; Read and write bank 1
lda $C08B
lda #$11
sta $D17B ; $D17B is $53 in Apple II/plus/e/enhanced
cmp $D17B
beq +
+prerr $0004 ;; E0004: 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
sec
rts
+ lda #$33
sta $FE1F ; FE1F is $60 in Apple II/plus/e/enhanced
cmp $FE1F
beq +
+prerr $0005 ;; E0005: We tried to put the language card into read RAM, write RAM, but failed to write.
!text "CANNOT WRITE TO LC RAM"
+prerred
sec
rts
+ lda $C083 ; Read and write bank 2
lda $C083
lda #$22
sta $D17B
cmp $D17B
beq +
+prerr $0006 ;; E0006: 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
sec
rts
+ lda $C08B ; Read and write bank 1 with single access (only one needed if banked in already)
lda #$11
cmp $D17B
beq +
+prerr $000D ;; E000D: We tried to put the language card into read bank 1, but failed to read.
!text "CANNOT READ FROM LC BANK 1 RAM"
+prerred
sec
rts
+ lda $C081 ; Read ROM with single access (only one needed to bank out)
lda #$53
cmp $D17B
beq .datadriventests
+prerr $000E ;; E000E: We tried to put the language card into read ROM, but failed to read.
!text "CANNOT READ FROM ROM"
+prerred
sec
rts
;;; Main data-driven test. PCL,PCH holds the address of the next
;;; data-driven test routine. We expect the various softswitches
;;; to be reset each time we loop at .ddloop.
.datadriventests
lda #<.tests
sta PCL
lda #>.tests
sta PCH
;;; Main data-drive-test loop.
.ddloop
ldy #0
;; Initialize to known state:
;; - $11 in $D17B bank 1 (ROM: $53)
;; - $22 in $D17B bank 2 (ROM: $53)
;; - $33 in $FE1F (ROM: $60)
lda $C08B ; Read and write bank 1
lda $C08B
lda #$11
sta $D17B
lda #$33
sta $FE1F
lda $C083 ; Read and write bank 2
lda $C083
lda #$22
sta $D17B
lda $C080
jmp (PCL) ; Jump to test routine
;; Test routine will JSR back to here, so the check data address is on the stack.
.test ;; ... test the quintiple of test values
inc $D17B
inc $FE1F
;; pull address off of stack: it points just below check data for this test.
pla
sta .checkdata
pla
sta .checkdata+1
;; .checkdata now points to d17b-current,fe1f-current,bank1,bank2,fe1f-ram test quintiple
;; Test current $D17B
jsr NEXTCHECK
cmp $D17B
beq +
lda $D17B
pha
jsr .printseq
+print
!text "$D17B TO CONTAIN $"
+printed
jsr CURCHECK
jsr PRBYTE
+print
!text ", GOT $"
+printed
pla
jsr PRBYTE
lda #$8D
jsr COUT
jmp .datatesturl
+ ;; Test current $FE1F
jsr NEXTCHECK
cmp $FE1F
beq +
lda $FE1F
pha
jsr .printseq
+print
!text "$FE1F=$"
+printed
jsr CURCHECK
jsr PRBYTE
+print
!text ", GOT $"
+printed
pla
jsr PRBYTE
lda #$8D
jsr COUT
jmp .datatesturl
+ ;; Test bank 1 $D17B
lda $C088
jsr NEXTCHECK
cmp $D17B
beq +
lda $D17B
pha
jsr .printseq
+print
!text "$D17B IN RAM BANK 1 TO CONTAIN $"
+printed
jsr CURCHECK
jsr PRBYTE
+print
!text ", GOT $"
+printed
pla
jsr PRBYTE
lda #$8D
jsr COUT
jmp .datatesturl
+ ;; Test bank 2 $D17B
lda $C080
jsr NEXTCHECK
cmp $D17B
beq +
lda $D17B
pha
jsr .printseq
+print
!text "$D17B IN RAM BANK 2 TO CONTAIN $"
+printed
jsr CURCHECK
jsr PRBYTE
+print
!text ", GOT $"
+printed
pla
jsr PRBYTE
lda #$8D
jsr COUT
jmp .datatesturl
+ ;; Test RAM $FE1F
lda $C080
jsr NEXTCHECK
cmp $FE1F
beq +
lda $FE1F
pha
jsr .printseq
+print
!text "RAM $FE1F=$"
+printed
jsr CURCHECK
jsr PRBYTE
+print
!text ", GOT $"
+printed
pla
jsr PRBYTE
lda #$8D
jsr COUT
jmp .datatesturl
+ ;; Jump PCL,PCH up to after the test data, and loop.
jsr NEXTCHECK
bne +
jmp .success
+ ldx .checkdata
ldy .checkdata+1
stx PCL
sty PCH
jmp .ddloop
.datatesturl
+prerr $0007 ;; E0007: This is a data-driven test of Language Card operation. We initialize $D17B in RAM bank 1 to $11, $D17B in RAM bank 2 to $22, and $FE1F in RAM to $33. Then, we perform a testdata-driven sequence of LDA and STA to the $C08X range. Finally we (try to) increment $D17B and $FE1F. Then we test (a) the current live value in $D17B, (b) the current live value in $FE1F, (c) the RAM bank 1 value of $D17B, (d) the RAM bank 2 value of $D17B, and (e) the RAM value of $FE1F, to see whether they match expected values. $D17B is usually $53 in ROM, and $FE1F is usally $60. For more information on the operation of the language card soft-switches, see Understanding the Apple IIe, by James Fielding Sather, Pg 5-24.
!text "DATA-DRIVEN TEST FAILED"
+prerred
sec
rts
.printseq
+print
!text "AFTER SEQUENCE OF:",$8D,"- LDA $C080",$8D
+printed
jsr PRINTTEST
+print
!text "- INC $D17B",$8D,"- INC $FE1F",$8D,"EXPECTED "
+printed
rts
.tests
;; Format:
;; Sequence of test instructions, finishing with `jsr .test`.
;; - quint: expected current $d17b and fe1f, then d17b in bank1, d17b in bank 2, and fe1f
;; (All sequences start with lda $C080, just to reset things to a known state.)
;; 0-byte to terminate tests.
lda $C088 ; Read $C088 (RAM read, write protected)
jsr .test ;
!byte $11, $33, $11, $22, $33 ;
;
lda $C080 ; Read $C080 (read bank 2, write disabled)
jsr .test ;
!byte $22, $33, $11, $22, $33 ;
;
lda $C081 ; Read $C081 (ROM read, write disabled)
jsr .test ;
!byte $53, $60, $11, $22, $33 ;
;
lda $C081 ; Read $C081, $C089 (ROM read, bank 1 write)
lda $C089 ;
jsr .test ;
!byte $53, $60, $54, $22, $61 ;
;
lda $C081 ; Read $C081, $C081 (read ROM, write RAM bank 2)
lda $C081 ;
jsr .test ;
!byte $53, $60, $11, $54, $61 ;
;
lda $C081 ; Read $C081, $C081, write $C081 (read ROM, write RAM bank bank 2)
lda $C081 ;
sta $C081 ;
jsr .test ;
!byte $53, $60, $11, $54, $61 ; See https://github.com/zellyn/a2audit/issues/3
;
lda $C08B ; Read $C08B (read RAM bank 1, no write)
jsr .test ;
!byte $11, $33, $11, $22, $33 ;
;
lda $C083 ; Read $C083 (read RAM bank 2, no write)
jsr .test ;
!byte $22, $33, $11, $22, $33 ;
;
lda $C08B ; Read $C08B, $C08B (read/write RAM bank 1)
lda $C08B ;
jsr .test ;
!byte $12, $34, $12, $22, $34 ;
;
lda $C08F ; Read $C08F, $C087 (read/write RAM bank 2)
lda $C087 ;
jsr .test ;
!byte $23, $34, $11, $23, $34 ;
;
lda $C087 ; Read $C087, read $C08D (read ROM, write bank 1)
lda $C08D ;
jsr .test ;
!byte $53, $60, $54, $22, $61 ;
;
lda $C08B ; Read $C08B, write $C08B, read $C08B (read RAM bank 1, no write)
sta $C08B ; (this one is tricky: reset WRTCOUNT by writing halfway)
lda $C08B ;
jsr .test ;
!byte $11, $33, $11, $22, $33 ;
;
sta $C08B ; Write $C08B, write $C08B, read $C08B (read RAM bank 1, no write)
sta $C08B ;
lda $C08B ;
jsr .test ;
!byte $11, $33, $11, $22, $33 ;
;
clc ; Read $C083, $C083 (read/write RAM bank 2)
ldx #0 ;
inc $C083,x ; Uses "6502 false read"
jsr .test ;
!byte $23, $34, $11, $23, $34 ;
;
!byte 0 ; End of tests
nop ; Provide clean break after data when viewing disassembly
nop
.success
;; Success
+print
!text "LANGUAGE CARD TESTS SUCCEEDED",$8D
+printed
lda #1
sta LCRESULT
clc
rts
} ;langcard
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