Apple-2gs-SW
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MiniMemoryTester
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some notes

This commit is contained in:
Dagen Brock 2015-10-15 21:29:10 -05:00
parent c27f634310
commit 99cab87e91
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src/mmt.s
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@ -5,6 +5,26 @@
* 2015-09-16 *
****************************************
********************************************************************
* Some notes *
* *
* Large portions of this program are written in one of the two cpu *
* modes: m=1 (short) x=0 (long) or m=0 (long) x=0 (long) *
* The 8-bit test modes, in particular, are written with a short *
* accumulator, but long index registers. This way it can easily *
* scan a bank of memory using the X register from 0000 to FFFF. *
* Likewise, when running 16-bit test modes, we write 16 bit values *
* using a long accumulator, and still using long index registers. *
* However, we also increment or decrement by two, since it writes *
* two bytes at a time with a long accumulator. *
* *
* This program favors configurability and reusable code, over *
* speed. There's also not much thought to stability, but I wanted *
* to allow the user to try to test their RAM as they see fit. *
* *
********************************************************************
org $2000 ; start at $2000 (all ProDOS8 system files)
typ $ff ; set P8 type ($ff = "SYS") for output file
dsk mtsystem ; tell compiler what name for output file
@ -1044,6 +1064,7 @@ TestTwoPassRestoreSeed
lda TwoPassSeed+1 ;if we are on a read pass, restore our seed
sta _seed16a
sta _seed
lda TwoPassSeed
sta _seed16b