mirror of https://github.com/nmlgc/ReC98.git
87 lines
1.3 KiB
NASM
87 lines
1.3 KiB
NASM
public CDG_PUT_8
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cdg_put_8 proc far
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@@slot = word ptr 6
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@@top = word ptr 8
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@@left = word ptr 10
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push bp
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mov bp, sp
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push si
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push di
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call grcg_setcolor pascal, (GC_RMW shl 16) + 0
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mov si, [bp+@@slot]
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shl si, 4
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add si, offset _cdg_slots
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mov ax, [si+cdg_t.seg_colors]
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mov word ptr cs:@@seg_colors+1, ax
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mov ax, [bp+@@left]
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sar ax, 3
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add ax, [si+cdg_t.offset_at_bottom_left]
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mov di, ax
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mov word ptr cs:@@offset_at_bottom_left+1, ax
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mov ax, [si+cdg_t.vram_dword_w]
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mov word ptr cs:@@width_1+1, ax
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mov word ptr cs:@@width_2+1, ax
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shl ax, 2
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add ax, (640 / 8)
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mov word ptr cs:@@stride+1, ax
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jmp short $+2
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mov ax, [bp+@@top]
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mov bx, ax
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shl ax, 2
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add ax, bx
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add ax, 0A800h
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mov es, ax
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push ds
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mov ax, [si+cdg_t.seg_alpha]
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mov ds, ax
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xor si, si
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@@stride:
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mov dx, 1234h
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cld
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@@width_1:
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mov cx, 1234h
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rep movsd
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sub di, dx
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jns short @@width_1
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xor al, al
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out 7Ch, al
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@@offset_at_bottom_left:
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mov bx, 1234h
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mov di, bx
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xor si, si
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@@seg_colors:
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mov ax, 1234h
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mov ds, ax
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assume ds:nothing
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@@row_loop:
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@@width_2:
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mov cx, 1234h
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@@blit_dword:
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mov eax, [si]
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or es:[di], eax
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add si, 4
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add di, 4
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loop @@blit_dword
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sub di, dx
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jns short @@row_loop
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mov di, bx
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vram_plane_next es, @@row_loop
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@@ret:
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pop ds
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assume ds:_DATA
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pop di
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pop si
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pop bp
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retf 6
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cdg_put_8 endp
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align 2
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