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Commit 7d878f

2026-03-19 08:25:14 Bob Green: -/-
programming/examples/duart.md ..
@@ 4,61 4,9 @@
### PIT
#### vasm
```asm
- /* PI/T Timer Register Addresses */
- pit_base equ $af0001
- pit_pgcr equ pit_base
- pit_psrr equ pit_base+2
- pit_paddr equ pit_base+4
- pit_pbddr equ pit_base+6
- pit_pcddr equ pit_base+8
- pit_pivr equ pit_base+10
- pit_pacr equ pit_base+12
- pit_pbcr equ pit_base+14
- pit_padr equ pit_base+16
- pit_pbdr equ pit_base+18
- pit_paar equ pit_base+20
- pit_pbar equ pit_base+22
- pit_pcdr equ pit_base+24
- pit_psr equ pit_base+26
-
- pit_tcr equ pit_base+32
- pit_tivr equ pit_base+34
- pit_cprh equ pit_base+38
- pit_cprm equ pit_base+40
- pit_cprl equ pit_base+42
- pit_cntrh equ pit_base+46
- pit_cntrm equ pit_base+48
- pit_cntrl equ pit_base+50
- pit_tsr equ pit_base+52
```
#### gcc
```c
- /* PI/T Timer Register Addresses */
- #define pit_base ((unsigned char*) 0xaf0001)
-
- #define pit_pgcr ((unsigned char*) pit_base)
- #define pit_psrr ((unsigned char*) pit_base+2)
- #define pit_paddr ((unsigned char*) pit_base+4)
- #define pit_pbddr ((unsigned char*) pit_base+6)
- #define pit_pcddr ((unsigned char*) pit_base+8)
- #define pit_pivr ((unsigned char*) pit_base+10)
- #define pit_pacr ((unsigned char*) pit_base+12)
- #define pit_pbcr ((unsigned char*) pit_base+14)
- #define pit_padr ((unsigned char*) pit_base+16)
- #define pit_pbdr ((unsigned char*) pit_base+18)
- #define pit_paar ((unsigned char*) pit_base+20)
- #define pit_pbar ((unsigned char*) pit_base+22)
- #define pit_pcdr ((unsigned char*) pit_base+24)
- #define pit_psr ((unsigned char*) pit_base+26)
- #define pit_tcr ((unsigned char*) pit_base+32)
- #define pit_tivr ((unsigned char*) pit_base+34)
- #define pit_cprh ((unsigned char*) pit_base+38)
- #define pit_cprm ((unsigned char*) pit_base+40)
- #define pit_cprl ((unsigned char*) pit_base+42)
- #define pit_cntrh ((unsigned char*) pit_base+46)
- #define pit_cntrm ((unsigned char*) pit_base+48)
- #define pit_cntrl ((unsigned char*) pit_base+50)
- #define pit_tsr ((unsigned char*) pit_base+52)
```
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