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Merge pull request #5636 from MoochMcGee/master

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Fix M6502 reset procedure. Fixes MT6486 at the very least. [Melissa G…
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R. Belmont 2019-09-14 22:39:54 -04:00 committed by GitHub
commit 9def59d2ec
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2 changed files with 4 additions and 1 deletions
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2
src/devices/cpu/m6502/m6502.cpp
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@ -99,7 +99,7 @@ void m6502_device::init()
X = 0x80; X = 0x80;
Y = 0x00; Y = 0x00;
P = 0x36; P = 0x36;
SP = 0x01bd; SP = 0x0100;
TMP = 0x0000; TMP = 0x0000;
TMP2 = 0x00; TMP2 = 0x00;
IR = 0x00; IR = 0x00;

3
src/devices/cpu/m6502/om6502.lst
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@ -1218,6 +1218,9 @@ tya_imp
# exceptions # exceptions
reset reset
read_arg(SP); SP = 0x1ff;
read_arg(SP); SP--;
read_arg(SP); SP--;
P |= F_I; PC = read_arg(0xfffc); P |= F_I; PC = read_arg(0xfffc);
PC = set_h(PC, read_arg(0xfffd)); PC = set_h(PC, read_arg(0xfffd));
prefetch(); prefetch();