Improve initialization sequence documentation

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Virgil Dupras 2020-11-28 11:17:50 -05:00
parent f8b7a3ce65
commit b48455e4db

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@ -127,13 +127,13 @@ offsets, but thankfully, there aren't many system variables.
Here's a list of them:
SYSVARS FUTURE USES +3c BLK(*
+02 CURRENT +3e A@*
+04 HERE +40 A!*
+06 C<? +42 A,*
+02 CURRENT +3e A@ ialias
+04 HERE +40 A! ialias
+06 C<? +42 A, ialias
+08 C<* override +44 FUTURE USES
+0a NLPTR +51 CURRENTPTR
+0c C<* +53 (emit) override
+0e WORDBUF +55 (key) override
+0a NL ialias +51 CURRENTPTR
+0c C<* +53 EMIT ialias
+0e WORDBUF +55 KEY ialias
+2e BOOT C< PTR +57 FUTURE USES
+30 IN>
+32 IN(* +70 DRIVERS
@ -186,8 +186,17 @@ very few things.
In a normal system, BOOT is in core words at B396 and does a
few things:
1. Initialize all overrides to 0.
2. Write LATEST in BOOT C< PTR ( see below ).
1. Initialize a few core variables:
CURRENT* -> CURRENT (RAM+02)
BOOT C< PTR -> LATEST
C<* override -> 0
2. Initialized ialiases in this way:
EMIT -> (emit)
KEY -> (key)
NL -> CRLF
A@ -> C@
A! -> C!
A, -> C,
3. Set "C<*", the word that C< calls, to (boot<).
4. Call INTERPRET which interprets boot source code until
ASCII EOT (4) is met. This usually initializes drivers.
@ -196,6 +205,10 @@ few things:
6. (main) interprets from rdln input (usually from KEY) until
EOT is met, then calls BYE.
If, for some reason, you need to override an ialias at some
point, you de-override it by re-setting it to the address of
the word specified at step 2.
# Stable ABI
The Stable ABI lives at the beginning of the binary and prov-