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Removed the Disk][ f/w patch (track stepping delay) in all disk modes
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@ -759,19 +759,11 @@ void DiskLoadRom(LPBYTE pCxRomPeripheral, UINT uSlot)
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memcpy(pCxRomPeripheral + uSlot*APPLE_SLOT_SIZE, pData, DISK2_FW_SIZE);
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if (enhancedisk)
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{
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// Disable the track stepping delay in the Disk II controller firmware
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*(pCxRomPeripheral + (uSlot*APPLE_SLOT_SIZE) + 0x4C) = 0xA9;
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*(pCxRomPeripheral + (uSlot*APPLE_SLOT_SIZE) + 0x4D) = 0x00;
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*(pCxRomPeripheral + (uSlot*APPLE_SLOT_SIZE) + 0x4E) = 0xEA;
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// The following maintains the firmware's ADC checksum (used by "The CIA Files")
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// Correcting for both ADC and EOR checksums is not possible in this case.
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*(pCxRomPeripheral + (uSlot*APPLE_SLOT_SIZE) + 0x4B) = 0x87; // was 0x56
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}
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//
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// NB. We used to disable the track stepping delay in the Disk II controller firmware by
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// patching $C64C with $A9,$00,$EA. Now not doing this since:
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// . Authentic Speed should be authentic
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// . Enhanced Speed runs emulation unthrottled, so removing the delay has negligible effect
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// . Patching the f/w breaks the ADC & EOR checksums used by "The CIA Files" (Tricy Dick)
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RegisterIoHandler(uSlot, Disk_IORead, Disk_IOWrite, NULL, NULL, NULL, NULL);
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}
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