Difference between revisions of "83Plus:Ports:24"
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'''Function:''' Flash Execution Limits High Bit | '''Function:''' Flash Execution Limits High Bit | ||
| − | Bit 0 of this port forms the high bit of page number for port | + | Bit 0 of this port forms the high bit of page number for port 22. Bit 1 of this port forms the high bit of the page number for port 23. Therefore, this port supports 8 MB flash chips. |
| − | Since no 8 MB flash chip exists, this port in effect overrides [[83Plus:Ports: | + | Since no 8 MB flash chip exists, this port in effect overrides both [[83Plus:Ports:22|port 22]] and [[83Plus:Ports:23|port 23]]. |
=== Write Values === | === Write Values === | ||
| − | * Bit 0: High bit (bit 8) of port | + | * Bit 0: High bit (bit 8) of port 22 |
| − | * Bit 1: High bit (bit 8) of port | + | * Bit 1: High bit (bit 8) of port 23 |
| − | * Bits 2-7: Toggleable, but no effect is apparent | + | * Bits 2-7: Toggleable, but no effect is apparent. These bits are currently unused. |
=== Read Values === | === Read Values === | ||
| Line 21: | Line 21: | ||
== Comments == | == Comments == | ||
| − | |||
| − | |||
This port does not exist on the standard 83 Plus. See ports [[83Plus:Ports:05|5]] and [[83Plus:Ports:16|16]] instead. | This port does not exist on the standard 83 Plus. See ports [[83Plus:Ports:05|5]] and [[83Plus:Ports:16|16]] instead. | ||
Latest revision as of 14:52, 20 January 2021
| This port only exists as a distinct port on the TI-83 Plus Silver Edition, the TI-84 Plus, and the TI-84 Plus Silver Edition. On the standard TI-83 Plus, it acts as a shadow of port 04. |
| This port is protected, which means user programs cannot ordinarily write to it directly. |
Synopsis
Port Number: 24h
Function: Flash Execution Limits High Bit
Bit 0 of this port forms the high bit of page number for port 22. Bit 1 of this port forms the high bit of the page number for port 23. Therefore, this port supports 8 MB flash chips.
Since no 8 MB flash chip exists, this port in effect overrides both port 22 and port 23.
Write Values
- Bit 0: High bit (bit 8) of port 22
- Bit 1: High bit (bit 8) of port 23
- Bits 2-7: Toggleable, but no effect is apparent. These bits are currently unused.
Read Values
- Bit 0-7: Reads whatever was last written
Comments
This port does not exist on the standard 83 Plus. See ports 5 and 16 instead.
