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https://github.com/fadden/6502bench.git
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7a7ff44d3a
If an address resolves to a user label in an isolated region, we don't want to use it. However, we still want to try to match it to a project/platform symbol. For example, suppose the isolated code wants to reference address $1C00, which is a memory-mapped I/O location in one area, but a regular bunch of code in the other. We don't want it to map to the regular code, but we do want it to resolve to our table of platform I/O addresses. We now handle this correctly. The regression test has been updated to check this. The current implementation does a linear scan through the symbol table, but I'm hoping this is not a common situation. The reference manual has been updated to describe the new feature.
256 lines
4.2 KiB
ArmAsm
256 lines
4.2 KiB
ArmAsm
!cpu 6502
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THREE_K = $3000 ;project symbol test
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IN_1 = $9000
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IN_2 = $a000
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IN_3 = $b000
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IN_4 = $c000
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* = $0800
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jsr region1
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jsr region2
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jsr THREE_K
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jsr $4000
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lda L9005
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lda LA008
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lda IN_3+11
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lda IN_4+14
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self !byte $ad,$ea
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L081A nop
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jsr altbnk1
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jsr altbnk2
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jmp done
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altbnk1 bit $ffc0
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lda self+1
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bne L081A
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rts
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!pseudopc *+$0000 {
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altbnk2 bit $ffc0
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lda $0819
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bne $081a
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ldx $081b
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rts
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}
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done nop
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rts
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!fill 197,$00
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!pseudopc $1000 {
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region1x lda region1x
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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rts
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!fill 202,$00
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}
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!pseudopc $1000 {
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region1 lda region1
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pha
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ldy #$11
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nop
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@copy lda inner1_pre,y
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sta inner1,y
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dey
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bpl @copy
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bit $101d
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jsr inner1
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jmp finish1
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inner1_pre
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!pseudopc $9000 {
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inner1 ldx inner1
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ldy #$aa
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L9005 ldy finish1
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ldy finish2
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ldy $302b
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ldy $402b
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rts
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}
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finish1 ldy finish1
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ldx region1
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ldx region2
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ldx THREE_K
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ldx $4000
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lda inner1
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lda inner2
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lda IN_3
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lda IN_4
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pla
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rts
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!fill 184,$00
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}
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!pseudopc $2000 {
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region2 lda region2
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pha
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ldy #$11
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nop
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@copy lda inner2_pre,y
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sta inner2,y
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dey
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bpl @copy
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bit $201d
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jsr inner2
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jmp finish2
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inner2_pre
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!pseudopc $a000 {
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inner2 ldx inner2
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ldy #$aa
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ldy $102b
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LA008 ldy finish2
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ldy $302b
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ldy $402b
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rts
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}
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finish2 ldy finish2
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ldx $1000
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ldx region2
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ldx THREE_K
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ldx $4000
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lda IN_1
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lda inner2
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lda IN_3
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lda IN_4
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pla
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rts
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!fill 184,$00
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}
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!pseudopc $3000 {
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region3 lda region3
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pha
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ldy #$11
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nop
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@copy lda inner3_pre,y
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sta inner3,y
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dey
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bpl @copy
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bit $301d
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jsr inner3
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jmp finish3
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inner3_pre
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!pseudopc $b000 {
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inner3 ldx inner3
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ldy #$aa
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ldy finish1
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ldy finish2
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ldy finish3
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ldy $402b
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rts
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}
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finish3 ldy finish3
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ldx region1
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ldx region2
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ldx region3
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ldx $4000
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lda inner1
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lda inner2
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lda inner3
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lda IN_4
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pla
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rts
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!fill 184,$00
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}
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!pseudopc $4000 {
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region4 lda region4
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pha
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ldy #$11
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nop
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@copy lda inner4_pre,y
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sta inner4,y
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dey
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bpl @copy
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bit $401d
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jsr inner4
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jmp finish4
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inner4_pre
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!pseudopc $c000 {
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inner4 ldx inner4
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ldy #$aa
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ldy $102b
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ldy $202b
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ldy $302b
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_checkit ldy finish4
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rts
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}
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finish4 ldy finish4
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ldx $1000
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ldx $2000
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ldx THREE_K
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ldx region4
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lda IN_1
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lda IN_2
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lda IN_3
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lda inner4
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pla
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rts
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!fill 184,$00
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}
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!pseudopc $0000 {
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!byte $ff
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}
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