84PCE:Ports:1000
From WikiTI
Synopsis
Port Number: 1000-1FFF
Memory-mapped Address: E00000
Function: Flash Controller
Parallel Controller
For more information see the parallel commands.
| Port | Default | Bits | Information |
| 1000 | 01 | 01 | Reset bit 0 to crash. Seems to reduce minimum flash wait states to 2. |
| 1001 | 00 | ?? | Freeze if write value greater than 3F |
| 1002 | 06 | 0F | Mapped flash chip address space size. |
| 1003 | 00 | FF | Latches value written |
| 1004 | 00 | FF | Latches value written |
| 1005 | 00 | FF | Added flash wait states over 5. |
| 1006 | 00 | FF | Latches value written |
| 1007 | FF | FF | Latches value written |
| 1008 | 00 | 01 | Latches value written |
| 1009 | 00 | FF | Ports 1009-100F latch value written |
| 1010 | 00 | 01 | Latches value written |
| 1011 | 00 | FF | Ports 1011-1017 latch value written |
Serial Controller
Only used in the Python Edition. For more information see the serial commands.
| Port | Default | Bits | Information |
| 1005 | 00 | FF | Probably ignored for compatibility with the parallel interface. |
| 1800 | 00000000 | FFFFFFFF | Extra data to send after command byte (usually used for a flash address). |
| 1804 | 00 | 07 | How many bytes from ports $1800-$1803 to send after the command byte. |
| 1805 | 000000 | 010000 | Unknown, something to do with the current flash command, always seems to be $0100. |
| 1808 | 00000000 | 000001FF | Number of bytes to transfer through port $1900 with the current flash command. |
| 180C | 00 | 46 | Bit 1 might be direction (0 = in, 1 = out). Bits 2, 6, and others unknown. |
| 180D | 0000 | 0000 | Unknown, possibly something to do with the current flash command. |
| 180F | 00 | FF | Current command byte. |
| 1818 | 00 | 02 | Bit 1 set when command data is available to be read from port 1900. |
| 1824 | 00 | 01 | Bit 0 set when the command finishes, write 1 to clear. |
| 1900 | 00 | FF | Read or write command data. |
