Difference between revisions of "Category:84PCE:General Hardware Information"

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(Adding PL111 doc links)
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** OUT causes a reset
 
** OUT causes a reset
 
** IN produces a constant value
 
** IN produces a constant value
*** Rather, ports are now memory mapped to certain RAM addresses
+
* There is memory-mapped I/O, starting at E00000. Most port ranges have a mapped address, and RAM programs are allowed to use the memory-mapped I/O.
*** However, ports controlling items such as the testing LED remain off-limits, for good reasons.
+
** The 00xx range of ports is not mapped. This range includes permissions control, flash control, the testing LED, NMI control, and possibly master power management.
 
* Flash starts at $000000
 
* Flash starts at $000000
 
** There is also still a flash unlock sequence
 
** There is also still a flash unlock sequence

Revision as of 15:33, 2 April 2015

The TI-84 Plus CE and TI-83 Premium are two models new in 2015. The former is for the USA region (maybe all of North American?) and the latter is for France. The hardware is virtually identical between the two models.

Known hardware facts:

  • eZ80 CPU
    • Physical clock speed believed to be 48 MHz
    • Effective clock speed between 12-15 MHz
    • CPU might be clocked faster but have a lot of wait states
  • 4 MB flash chip
    • Bottom-boot organization this time
  • 256 K main RAM
  • Memory-mapped LCD
    • 153600 bytes of VRAM confirmed, unknown if more exists
    • Possibly an ARM Primecell PL111[HTML][PDF]
  • French version has testing LED; American version may get a testing LED in the future
  • User programs are prohibited from using any IN/OUT instructions
    • OUT causes a reset
    • IN produces a constant value
  • There is memory-mapped I/O, starting at E00000. Most port ranges have a mapped address, and RAM programs are allowed to use the memory-mapped I/O.
    • The 00xx range of ports is not mapped. This range includes permissions control, flash control, the testing LED, NMI control, and possibly master power management.
  • Flash starts at $000000
    • There is also still a flash unlock sequence
  • RAM starts at $D00000
  • Assembly programs and TI-BASIC programs are limited to one sector (64KB)
  • VRAM starts at $D40000
    • VRAM is executable

Pages in category "84PCE:General Hardware Information"

The following 3 pages are in this category, out of 3 total.