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byte-swap the FB (SBus)

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Romain Dolbeau 2022-08-27 10:21:49 +02:00
parent 87d04b187f
commit b5d553801f
1 changed files with 3 additions and 3 deletions
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6
nubus-to-ztex-gateware/goblin_fb.py
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@ -118,7 +118,7 @@ class VideoFrameBufferMultiDepth(Module, AutoCSR):
source_out_b = Signal(8)
# # #
# First the Color Look-up Table (for all but 1 bit & 32 bits)
# First the Color Look-up Table (for all but 1 bit & 16/32 bits)
# updated from the FIFO
# 8-and-less-than-8-bits mode used the 2^x first entries
### clut = Array(Array(Signal(8, reset = (255-i)) for i in range(0, 256)) for j in range(0, 3))
@ -172,9 +172,9 @@ class VideoFrameBufferMultiDepth(Module, AutoCSR):
if (endian == "big"): # this starts to _really_ mean "i'm in the SBusFPGA"...
handle_truecolor_databuf = [ Case(self.indexed_mode, {
0x0: [ data_buf_direct[0].eq(self.conv32.source.data[24:32]),
0x0: [ data_buf_direct[2].eq(self.conv32.source.data[24:32]),
data_buf_direct[1].eq(self.conv32.source.data[16:24]),
data_buf_direct[2].eq(self.conv32.source.data[8:16]), ],
data_buf_direct[0].eq(self.conv32.source.data[8:16]), ],
0x1: [ data_buf_direct[0].eq(Cat(Signal(3, reset = 0), self.conv16.source.data[0:5])), # fixme: 16-bits in X11 ??? (this is QD32)
data_buf_direct[1].eq(Cat(Signal(3, reset = 0), self.conv16.source.data[5:10])),
data_buf_direct[2].eq(Cat(Signal(3, reset = 0), self.conv16.source.data[10:15])), ]