summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/cpu/unsp/unspdasm_extended.cpp
diff options
context:
space:
mode:
author David Haywood <28625134+DavidHaywood@users.noreply.github.com>2020-09-04 23:04:10 +0100
committer GitHub <noreply@github.com>2020-09-04 18:04:10 -0400
commitdf472dbacf3ec2a01616d4c6e5b3442b0f7e709c (patch)
treef7148c79ef36fab7dadab41683924953c3648bf5 /src/devices/cpu/unsp/unspdasm_extended.cpp
parent5b0dd0e54192c7f9e688a16b12ee202b21d9c7bc (diff)
pcp8718 / pcp8728 work, including unsp2.0 fixes [David Haywood] (#7179)
* possible unsp20 fixes * better * tidy ups * reorgainize * force it to run interrupt instead of simulating behavior * more guesses * change how hack works while we figure this out * some kind of external devcice seems to manage the game selection number. * some cleanups of old HLE * modify logging * stop menu crashing, sim code is still very rough tho
Diffstat (limited to 'src/devices/cpu/unsp/unspdasm_extended.cpp')
-rw-r--r--src/devices/cpu/unsp/unspdasm_extended.cpp36
1 files changed, 17 insertions, 19 deletions
diff --git a/src/devices/cpu/unsp/unspdasm_extended.cpp b/src/devices/cpu/unsp/unspdasm_extended.cpp
index 6ec49ec0d13..3caa182b237 100644
--- a/src/devices/cpu/unsp/unspdasm_extended.cpp
+++ b/src/devices/cpu/unsp/unspdasm_extended.cpp
@@ -133,32 +133,30 @@ offs_t unsp_20_disassembler::disassemble_extended_group(std::ostream& stream, of
uint8_t rx = (ximm & 0x0e00) >> 9;
if (size == 0) size = 8;
- size -= 1;
-
- if ((rx-size) >= 0)
- util::stream_format(stream, "(Extended group) push %s, %s to [%s]",
- extregs[rx-size],
- extregs[rx],
- (rb & 0x8) ? extregs[rb & 0x7] : regs[rb & 0x7]);
- else
- util::stream_format(stream, "(Extended group) push <BAD>");
+
+ int start = rx;
+ int end = (start-(size-1))&7;
+
+ util::stream_format(stream, "(Extended group) push %s, %s to [%s]",
+ extregs[start],
+ extregs[end],
+ (rb & 0x8) ? extregs[rb & 0x7] : regs[rb & 0x7]);
}
else
{
uint8_t rb = (ximm & 0x000f) >> 0;
uint8_t size = (ximm & 0x7000) >> 12;
uint8_t rx = (ximm & 0x0e00) >> 9;
-
+
if (size == 0) size = 8;
- size -= 1;
-
- if ((rx-size) >= 0)
- util::stream_format(stream, "(Extended group) pop %s, %s from [%s]",
- extregs[7-rx],
- extregs[7-(rx-size)],
- (rb & 0x8) ? extregs[rb & 0x7] : regs[rb & 0x7]);
- else
- util::stream_format(stream, "(Extended group) pop <BAD>");
+
+ int start = (rx + 1)&7;
+ int end = (start+(size-1))&7;
+
+ util::stream_format(stream, "(Extended group) pop %s, %s from [%s]",
+ extregs[start],
+ extregs[end],
+ (rb & 0x8) ? extregs[rb & 0x7] : regs[rb & 0x7]);
}
return UNSP_DASM_OK;
}