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riven: got hd loading working

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will forever be hard keeping block (512 byte) and sector (256 byte)
sizes separate
This commit is contained in:
Vince Weaver 2024-07-17 11:14:20 -04:00
parent 690fc0d303
commit 702bde56d9
2 changed files with 12 additions and 1 deletions
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8
games/riven_hgr/NOTES
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@ -84,8 +84,14 @@ final movie roto procedure:
scale to 80x48
save
;================================
; NOTE: for hard-disk image we use 512-byte blocks (not 256-byte sectors)
; so be careful using odd-numbered block lengths!
; This is mostly an issue for the $7F long almost-32k files
; and the 1-block level info files, otherwise we mostly are even
Disk00 Map (disk has 35 tracks, each 4k in size)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~$~~~~~~~
T 0 = Qboot
T 0.5 = TITLE 1618 bytes 8S = 0T8S (2048) 400B free
T 1 = QLOAD 2346 bytes 16S = 1T00S (4096) 2k free

5
games/riven_hgr/qload_hd.s
View File

@ -90,6 +90,11 @@ load_file:
lda LENGTH_ARRAY,X
clc
adc #1
lsr ; important! blocks=sectors/2
; need to round up if it was odd
; careful: this could over-write if not careful
sta COUNT
jsr seekread