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New ChipSet parameter ('floppies') used to specify number and capacity of installed floppy drives

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This commit is contained in:
Jeff Parsons 2014-10-24 14:42:17 -07:00 • committed by jeffpar
commit ae6dc3bd12
122 changed files with 923 additions and 853 deletions
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7
my_modules/pcjs-client/lib/hdc.js
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@ -48,7 +48,8 @@ if (typeof module !== 'undefined') {
*
* The HDC component simulates an STC-506/412 interface to an IBM-compatible fixed disk drive. The first
* such drive was a 10Mb 5.25-inch drive containing two platters and 4 heads. Data spanned 306 cylinders
* for a total of 1224 tracks, with 17 sectors/track and 512 bytes/sector.
* for a total of 1224 tracks, with 17 sectors/track and 512 bytes/sector. Support has since been expanded
* to include the original PC AT Western Digital controller.
*
* HDC supports the following component-specific properties:
*
@ -90,7 +91,7 @@ function HDC(parmsHDC) {
try {
/*
* The most likely source of any exception will be right here, where we're parsing
* the JSON-encoded disk data.
* the JSON-encoded drive data.
*/
this.aDriveConfigs = eval("(" + parmsHDC['drives'] + ")");
/*
@ -202,7 +203,7 @@ HDC.aDriveTypes = [
*
* Without the "DUAL" bit set, when it came time later to report the diskette drive type, the "DISK_TYPE" function
* (@F000:273D) would branch to one of two almost-identical blocks of code -- specifically, a block that disallowed
* diskette drive types >= 2 (ChipSet.CMOS.FDRIVE.DSDD) instead of >= 3 (ChipSet.CMOS.FDRIVE.DSHD).
* diskette drive types >= 2 (ChipSet.CMOS.FDRIVE.FD360) instead of >= 3 (ChipSet.CMOS.FDRIVE.FD1200).
*
* In other words, the "Fixed Disk" portion of the HFCOMBO controller has to be present and operational if the user
* wants to use high-capacity (80-track) diskettes with "Diskette Drive" portion of the controller. This may not be