From ffc1b9a49fcf37ab833cfa4634f56dfffdfa7cae Mon Sep 17 00:00:00 2001 From: yz70s Date: Sun, 24 Nov 2019 17:34:41 +0100 Subject: intelfsh.cpp: sst 49lf020 does not support certain commands in certain states (nw) --- src/devices/machine/intelfsh.cpp | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/src/devices/machine/intelfsh.cpp b/src/devices/machine/intelfsh.cpp index f0cacb6c7a6..c08d9f800ac 100644 --- a/src/devices/machine/intelfsh.cpp +++ b/src/devices/machine/intelfsh.cpp @@ -702,11 +702,19 @@ void intelfsh_device::write_full(uint32_t address, uint32_t data) m_flash_mode = FM_WRITEPART1; break; case 0x50: // clear status reg - m_status = 0x80; - m_flash_mode = FM_READSTATUS; + if ((m_type == FLASH_SST_49LF020) && (m_flash_mode == FM_NORMAL)) + logerror("Invalid flash mode byte %x\n", data & 0xff); + else + { + m_status = 0x80; + m_flash_mode = FM_READSTATUS; + } break; case 0x20: // block erase - m_flash_mode = FM_CLEARPART1; + if (m_type == FLASH_SST_49LF020) + logerror("Unknown flash mode byte %x\n", data & 0xff); + else + m_flash_mode = FM_CLEARPART1; break; case 0x60: // set master lock m_flash_mode = FM_SETMASTER; -- cgit v1.2.3