Apple-2-SW/prog8
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This commit is contained in:
Irmen de Jong 2021-03-06 15:43:23 +01:00
parent cf74e73e27
commit d787795759
1 changed files with 37 additions and 37 deletions
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74
examples/cx16/bobs.p8
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@ -38,7 +38,7 @@ main {
palette.set_color(0, $000)
palette.set_color(1, $af8)
cx16.set_irq(&irq, false)
cx16.set_rasterirq(&irq, 340) ; time it so that the page flip occurs near the bottom of the screen to avoid tearing
repeat {
; don't exit
@ -85,7 +85,10 @@ main {
sub init_buffers() {
; erase all vram
cx16.vaddr(0, 0, 0, true)
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_L = 0
cx16.VERA_ADDR_M = 0
cx16.VERA_ADDR_H = %00010000 ; auto incr 1
repeat $ffff
cx16.VERA_DATA0 = 0
repeat $f960
@ -102,34 +105,37 @@ main {
bitshift(lsb(blit_x) & 7)
; left column of the (shifted)sprite
; TODO don't call vaddr, inline it here
cx16.vaddr(bank, vmem, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.vaddr(bank, vmem, 1, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for write (next line)
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
cx16.VERA_ADDR_H = bank | %10110000 ; increment 40 for read (next line)
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
cx16.VERA_ADDR_H = bank | %10110000 ; increment 40 for read (next line)
ubyte ix
for ix in 0 to len(shifted_sprite)-1 step 3
cx16.VERA_DATA1 = cx16.VERA_DATA0 & shifted_mask[ix] | shifted_sprite[ix]
; middle column of the (shifted)sprite
cx16.vaddr(bank, vmem+1, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.vaddr(bank, vmem+1, 1, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for write (next line)
vmem++
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
for ix in 1 to len(shifted_sprite)-1 step 3
cx16.VERA_DATA1 = cx16.VERA_DATA0 & shifted_mask[ix] | shifted_sprite[ix]
; right column of the (shifted)sprite
cx16.vaddr(bank, vmem+2, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.vaddr(bank, vmem+2, 1, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for write (next line)
vmem++
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
for ix in 2 to len(shifted_sprite)-1 step 3
cx16.VERA_DATA1 = cx16.VERA_DATA0 & shifted_mask[ix] | shifted_sprite[ix]
@ -137,10 +143,6 @@ main {
anim2 += 190
anim3 += 222
anim4 += 195
; anim1 += 107
; anim2 += 80
; anim3 += 122
; anim4 += 93
}
sub bitshift(ubyte shift) {
@ -177,29 +179,27 @@ main {
conv.str_uw0(number)
uword pixelsptr = &numberpixels + (conv.string_out[1] & 15)*7
ubyte pix
cx16.vaddr(bank, vmem, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
cx16.VERA_ADDR_H = bank | %10110000 ; increment 40 for read (next line)
for pix in 0 to 6
cx16.VERA_DATA0 = pixelsptr[pix]
vmem++
cx16.vaddr(bank, vmem, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
pixelsptr = &numberpixels + (conv.string_out[2] & 15)*7
for pix in 0 to 6
cx16.VERA_DATA0 = pixelsptr[pix]
vmem++
cx16.vaddr(bank, vmem, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
pixelsptr = &numberpixels + (conv.string_out[3] & 15)*7
for pix in 0 to 6
cx16.VERA_DATA0 = pixelsptr[pix]
vmem++
cx16.vaddr(bank, vmem, 0, false)
cx16.VERA_ADDR_H &= 1
cx16.VERA_ADDR_H |= %10110000 ; increment 40 for read (next line)
cx16.VERA_ADDR_L = lsb(vmem)
cx16.VERA_ADDR_M = msb(vmem)
pixelsptr = &numberpixels + (conv.string_out[4] & 15)*7
for pix in 0 to 6
cx16.VERA_DATA0 = pixelsptr[pix]