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Create static drivers directly from source files.

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Up to now static drivers were created via co65 from dynamic drivers. However there was an issue with that approach:

The dynamic drivers are "o65 simple files" which obligates that they start with the 'code' segment. However dynamic drivers need to start with the module header - which is written to. For dynamic drivers this isn't more than a conceptual issue because they are always contain a 'data' segment and may therefore only be loaded into writable memory.

However when dynamic drivers are converted to static drivers using co65 then that issue becomes a real problem as then the 'code' segment may end up in non-writable memory - and thus writing to the module header fails.

Instead of changing the way dynamic drivers work I opted to rather make static driver creation totally independent from dynamic drivers. This allows to place the module header in the 'data' segment (see 'module.mac').
This commit is contained in:
Oliver Schmidt
2014-06-04 23:50:18 +02:00
parent 2bc4634860
commit 2c975d3642
79 changed files with 332 additions and 115 deletions
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libsrc/plus4/joy/plus4-stdjoy.s
+6 -1
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@@ -12,12 +12,17 @@
.include "plus4.inc"
.macpack generic
.macpack module
; ------------------------------------------------------------------------
; Header. Includes jump table
.segment "HEADER"
.if .xmatch ("MODULE_LABEL", .string(MODULE_LABEL))
module_header _plus4_stdjoy_joy
.else
module_header MODULE_LABEL
.endif
; Driver signature