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Support for RX11 diskette drives has been added, but is still untested

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This commit is contained in:
Jeff Parsons 2017-02-02 15:14:13 -08:00 • committed by Jeff Parsons
commit cacc2f7dad
32 changed files with 1531 additions and 660 deletions
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83
modules/pdp11/lib/defines.js
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@ -513,6 +513,8 @@ var PDP11 = {
RLMP: 0o174406, // RL11 Multi-Purpose Register
RLBE: 0o174410, // RL11 Bus (Address) Extension Register (RLV12 controller only)
DL11: 0o176500, // DL11 Additional Register Range (ends at 0o176676)
RXCS: 0o177170, // RX11 Command and Status Register
RXDB: 0o177172, // RX11 Data Buffer Register
RKDS: 0o177400, // RK11 Drive Status Register
RKER: 0o177402, // RK11 Error Register
RKCS: 0o177404, // RK11 Control Status Register
@ -738,7 +740,7 @@ var PDP11 = {
SCP: 0x2000, // (020000) Search Complete (R/O)
HE: 0x4000, // (040000) Hard Error (R/O)
ERR: 0x8000, // (100000) Composite Error (R/O) (set when any RKER bit is set)
UNUSED: 0x1200, // (120000) unused
UNUSED: 0x1200, // (011000) unused
RMASK: 0xEFFE, // (167776) bits readable
WMASK: 0x0F7F, // (007577) bits writable
SHIFT: {
@ -772,6 +774,7 @@ var PDP11 = {
PRI: 5,
VEC: 0o160,
DRIVES: 4, // maximum of 4 drives
PREFIX: "DY",
RLCS: { // 174400: Control Status Register
DRDY: 0x0001, // Drive Ready (R/O)
FUNC: 0x000E, // Function Code (F2,F1,F0) (R/W)
@ -865,6 +868,76 @@ var PDP11 = {
RDNC: 0b1110 // Read Data without Header Check
}
},
RX11: { // RX11 Disk Controller
PRI: 5,
VEC: 0o264,
DRIVES: 2, // maximum of 2 drives
PREFIX: "DX",
RXCS: { // 177170: Command and Status Register
GO: 0x0001, // (000001) Go (W/O)
FUNC: 0x000E, // (000016) Function Code (F2,F1,F0) (W/O)
UNIT: 0x0010, // (000020) Unit Select (W/O)
DONE: 0x0020, // (000040) Done (R/O)
IE: 0x0040, // (000100) Interrupt Enable (R/W, cleared on INIT)
TR: 0x0080, // (000400) Transfer Request (R/O)
RXINIT: 0x4000, // (040000) RX11 Initialize (W/O)
ERR: 0x8000, // (100000) Error (R/O, cleared on INIT or command)
UNUSED: 0x3F00, // (037400) unused
RMASK: 0x80E0, // (100340) bits readable
WMASK: 0x405F // (040137) bits writable
},
RXDB: { // 177172: Data Buffer Register
},
RXTA: {
MASK: 0x007F
},
RXSA: {
MASK: 0x001F
},
RXES: {
/*
* The DRDY bit is only valid when retrieved via a Read Status function or at completion of Initialize when it indicates
* status of drive O. It is asserted if the unit currently selected exists, is properly supplied with power, has a diskette
* installed correctly, has its door closed, and has a diskette up to speed.
*
* If the Error bit was set in the RXCS but Error bits are not set in the RXES, then specific error conditions can be accessed via
* a Read Error Register function.
*/
CRC: 0x0001, // CRC error (RXES is moved to the RXDB, and Error and Done are asserted)
PARITY: 0x0002, // parity error (RXES is moved to the RXDB, and Error and Done are asserted)
ID: 0x0004, // Initialize Done (following a programmable or UNIBUS initialization, or a power failure)
DEL: 0x0040, // Deleted Data Detected
DRDY: 0x0080 // Drive Ready
},
FUNC: { // NOTE: These function codes are pre-shifted to read/write directly from/to RXCS.FUNC
FILL: 0b0000, // Fill Buffer
EMPTY: 0b0010, // Empty Buffer
WRITE: 0b0100, // Write Sector
READ: 0b0110, // Read Sector
UNUSED: 0b1000, // UNUSED
RDSTAT: 0b1010, // Read Status
WRDEL: 0b1100, // Write Deleted Data Sector
RDERR: 0b1110 // Read Error Register
},
ERROR: {
HOME0: 0o0010, // Drive 0 failed to see home on Initialize
HOME1: 0o0020, // Drive 1 failed to see home on Initialize
BAD_HOME: 0o0030, // Found home when stepping out 10 tracks for INIT
NO_TRACK: 0o0040, // Tried to access a track greater than 77
FOUND_HOME: 0o0050, // Home was found before desired track was reached
SELF_DIAG: 0o0060, // Self-diagnostic error
NO_SECTOR: 0o0070, // Desired sector could not be found after looking at 52 headers (2 revolutions)
NO_SEP: 0o0110, // More than 40us and no SEP clock seen
NO_PREAM: 0o0120, // A preamble could not be found
NO_IOMARK: 0o0130, // Preamble found but no I/O mark found within allowable time span
CRC_HEADER: 0o0140, // CRC error on what we thought was a header
BAD_TRACK: 0o0150, // The header track address of a good header does not compare with the desired track
NO_ID: 0o0160, // Too many tries for an IDAM (identifies header)
NO_DATA: 0o0170, // Data AM not found in allotted time
CRC_DATA: 0o0200, // CRC error on reading the sector from the disk (No code appears in the ERREG).
BAD_PARITY: 0o0210 // All parity errors
}
},
VECTORS: {
0o060: "DL11R",
0o064: "DL11X",
@ -872,12 +945,14 @@ var PDP11 = {
0o074: "PC11X",
0o100: "KW11",
0o160: "RL11",
0o220: "RK11"
0o220: "RK11",
0o264: "RX11"
}
};
PDP11.RK11.RK05 = [203, 2, 12, 512, PDP11.RK11.RKDS.RK05 | PDP11.RK11.RKDS.SOK | PDP11.RK11.RKDS.RRDY];
PDP11.RL11.RL02K = [512, 2, 40, 256, PDP11.RL11.RLMP.GS_ST.LOCKON | PDP11.RL11.RLMP.GS_BH | PDP11.RL11.RLMP.GS_HO];
PDP11.RX11.RX01 = ["DX", 77, 1, 26, 128, 0];
PDP11.RK11.RK05 = ["RK", 203, 2, 12, 512, PDP11.RK11.RKDS.RK05 | PDP11.RK11.RKDS.SOK | PDP11.RK11.RKDS.RRDY];
PDP11.RL11.RL02K = ["RL", 512, 2, 40, 256, PDP11.RL11.RLMP.GS_ST.LOCKON | PDP11.RL11.RLMP.GS_BH | PDP11.RL11.RLMP.GS_HO];
PDP11.ACCESS.READ_WORD = PDP11.ACCESS.WORD | PDP11.ACCESS.READ; // formerly READ_MODE (2)
PDP11.ACCESS.READ_BYTE = PDP11.ACCESS.BYTE | PDP11.ACCESS.READ; // formerly READ_MODE (2) | BYTE_MODE (1)