diff options
author | MoochMcGee <mszoopers@protonmail.com> | 2019-09-14 19:20:26 -0500 |
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committer | MoochMcGee <mszoopers@protonmail.com> | 2019-09-14 19:20:26 -0500 |
commit | d3fa2c5b918406be83deeeaae4ab229338ab3e43 (patch) | |
tree | 116c25e56a5436c970a593533f7adeae816d831c | |
parent | 6fab7692981d7956fe400995e4774c9d007b215f (diff) |
Fix M6502 reset procedure. Fixes MT6486 at the very least. [Melissa Goad]
-rw-r--r-- | src/devices/cpu/m6502/m6502.cpp | 2 | ||||
-rw-r--r-- | src/devices/cpu/m6502/om6502.lst | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/src/devices/cpu/m6502/m6502.cpp b/src/devices/cpu/m6502/m6502.cpp index 2ca7329bf87..5ea3e864bb0 100644 --- a/src/devices/cpu/m6502/m6502.cpp +++ b/src/devices/cpu/m6502/m6502.cpp @@ -99,7 +99,7 @@ void m6502_device::init() X = 0x80; Y = 0x00; P = 0x36; - SP = 0x01bd; + SP = 0x0100; TMP = 0x0000; TMP2 = 0x00; IR = 0x00; diff --git a/src/devices/cpu/m6502/om6502.lst b/src/devices/cpu/m6502/om6502.lst index e9b8520c490..e831388a93a 100644 --- a/src/devices/cpu/m6502/om6502.lst +++ b/src/devices/cpu/m6502/om6502.lst @@ -1218,6 +1218,9 @@ tya_imp # exceptions reset + read_arg(SP); SP = 0x1ff; + read_arg(SP); SP--; + read_arg(SP); SP--; P |= F_I; PC = read_arg(0xfffc); PC = set_h(PC, read_arg(0xfffd)); prefetch(); |