816666615b
Add a machinetype identifier to help us quickly identify Apple //e (bit 7) and //e enhanced (bit 6). Use it in conio functions for 80-columns code instead of relying entirely on the __APPLE2ENH__ target. Move videomode() to the apple2 target, and have it return an error if 80-columns hardware is not available - this is a lie for now, it is considered available on //e enhanced, which may not be true, and not available on //e, which may also be not true. An ulterior patch will make that check correctly. Adapt the box/line drawing characters so that one can use MouseText on the apple2 target if it is available, by defining DYN_DRAW_BOX. No change by default: MouseText is considered available on apple2enh and not available on apple2.
74 lines
1.8 KiB
ArmAsm
74 lines
1.8 KiB
ArmAsm
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; Colin Leroy-Mira and Oliver Schmidt, 26.05.2025
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; Initialize box-drawing characters according to
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; MouseText availability
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.ifndef __APPLE2ENH__
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.constructor initboxchars
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.import machinetype
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.export _CH_HLINE
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.export _CH_VLINE
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.export _CH_ULCORNER
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.export _CH_URCORNER
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.export _CH_LLCORNER
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.export _CH_LRCORNER
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.export _CH_TTEE
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.export _CH_BTEE
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.export _CH_LTEE
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.export _CH_RTEE
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.export _CH_CROSS
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.segment "ONCE"
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initboxchars:
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bit machinetype ; IIe enhanced or newer?
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bvs out
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ldx #NUM_BOXCHARS ; No mousetext, patch characters
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: lda std_boxchars,x
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sta boxchars,x
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dex
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bpl :-
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out: rts
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; Replacement chars for when MouseText is not available
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std_boxchars: .byte '!'
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.byte '-'
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.byte '+'
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.byte '+'
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.byte '+'
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.byte '+'
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.data
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; MouseText-based box characters
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boxchars:
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VERT: .byte $DF
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HORIZ: .byte $5F
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ULCORNER: .byte $5F
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URCORNER: .byte $20
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LLCORNER: .byte $D4
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LRCORNER: .byte $DF
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NUM_BOXCHARS = *-boxchars
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; exported symbols, referencing our 6 bytes
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_CH_HLINE = HORIZ
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_CH_VLINE = VERT
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_CH_ULCORNER = ULCORNER
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_CH_URCORNER = URCORNER
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_CH_LLCORNER = LLCORNER
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_CH_LRCORNER = LRCORNER
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_CH_TTEE = ULCORNER
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_CH_BTEE = LLCORNER
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_CH_LTEE = LLCORNER
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_CH_RTEE = LRCORNER
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_CH_CROSS = LLCORNER
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.endif ; not __APPLE2ENH__
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