From 0ce807805d7de8d888710848f5a8a99a4e5395bb Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 5 Nov 2019 23:17:59 -0500
Subject: [PATCH] Eliminates most masks, at least for now.
---
Machines/AtariST/Video.cpp | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/Machines/AtariST/Video.cpp b/Machines/AtariST/Video.cpp
index e5745f16d..34c878caa 100644
--- a/Machines/AtariST/Video.cpp
+++ b/Machines/AtariST/Video.cpp
@@ -137,9 +137,10 @@ void Video::run_for(HalfCycles duration) {
output_border(run_length);
} else {
if(run_length < 32) {
- shift_out(run_length);
+ shift_out(run_length); // TODO: this might end up overrunning.
} else {
shift_out(32);
+ output_shifter = 0;
output_border(run_length - 32);
}
}
@@ -255,12 +256,12 @@ void Video::shift_out(int length) {
((output_shifter >> 63) & 1) |
((output_shifter >> 46) & 2)
];
- output_shifter = (output_shifter << 1) & 0xefff;
+ output_shifter = (output_shifter << 1);// & 0xfeffffff;
++pixel_buffer_.pixel_pointer;
}
} else {
while(length--) {
- output_shifter = (output_shifter << 1) & 0xefff;
+ output_shifter = (output_shifter << 1);// & 0xfeffffff;
}
}
break;
@@ -275,13 +276,13 @@ void Video::shift_out(int length) {
((output_shifter >> 29) & 4) |
((output_shifter >> 12) & 8)
];
- output_shifter = (output_shifter << 1) & 0xeeee;
+ output_shifter = (output_shifter << 1);// & 0xfefefefe;
++pixel_buffer_.pixel_pointer;
length -= 2;
}
} else {
while(length) {
- output_shifter = (output_shifter << 1) & 0xeeee;
+ output_shifter = (output_shifter << 1);// & 0xfefefefe;
length -= 2;
}
}