cdo/wipforth
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Make terminal xHEAD and xTAIL registers 32 bits

Browse Source 
This enables waiting on them with memory.atomic.wait32 (there is no
wait8) which is needed to avoid spinning when waiting for a key.
This commit is contained in:
Camden Dixie O'Brien
2026-03-02 18:51:42 +00:00
parent 22e477adf7
commit 2a3949e09f
4 changed files with 34 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
README.md
View File

@@ -44,12 +44,12 @@ You could use any HTTP server that sets these headers.
| Name | Address | Size / B | Access |
|--------|---------|----------|--------------|
| TXBUF | 0 | 32 | write |
| RXBUF | 32 | 32 | read |
| TXHEAD | 64 | 1 | atomic read |
| TXTAIL | 65 | 1 | atomic write |
| RXHEAD | 66 | 1 | atomic write |
| RXTAIL | 67 | 1 | atomic read |
| TXBUF | 00h | 32 | write |
| RXBUF | 20h | 32 | read |
| TXHEAD | 40h | 4 | atomic read |
| TXTAIL | 44h | 4 | atomic write |
| RXHEAD | 48h | 4 | atomic write |
| RXTAIL | 4Ch | 4 | atomic read |
For both sending (`TX`) and receiving (`RX`), there are three
registers: `xBUF`, `xHEAD` and `xTAIL`:
@@ -67,7 +67,7 @@ unoccupied byte between the tail and the head.
| Name | Address | Size / B | Access |
|----------|---------|----------|--------------|
| SYSREADY | 68 | 1 | atomic write |
| SYSREADY | 50h | 1 | atomic write |
The `SYSREADY` register is used to indicate when the system has booted
up and is ready for user input.