diff --git a/hardware/machinespecific.rst b/hardware/machinespecific.rst index e544c22..2fe395c 100644 --- a/hardware/machinespecific.rst +++ b/hardware/machinespecific.rst @@ -8,18 +8,48 @@ This page contains important notes related to specific machine models emulated b 8088 ---- +.. rubric:: IBM PC + +* The 1981 and 1982 variants correspond to the `earlier 16KB-64KB and later 64KB-256KB revisions of the motherboard `_, with different BIOS versions and memory size limits. + + * Those limits apply to on-board RAM; more can be added through :ref:`ISA memory expansion ` cards. + .. rubric:: IBM PCjr * Some applications may shift the display slightly to one side due to unconventional use of the PCjr video hardware. Unchecking the **Apply overscan deltas** option accessible through the internal video's :ref:`Configure button ` can help bring the display back into position. * Hard disks are not supported, as a PCjr-compatible hard disk controller is not emulated by 86Box. +.. rubric:: IBM XT + +* The 1982 and 1986 variants correspond to the `earlier 64-256KB and later 256-640KB revisions of the motherboard `_, with different BIOS versions and memory size limits. + + * Those limits apply to on-board RAM; more can be added through :ref:`ISA memory expansion ` cards. + 80286 ----- +.. _ibmat: .. rubric:: IBM AT +* On-board RAM is limited to 512 KB; more can be added through :ref:`ISA memory expansion ` cards. * The IBM Personal Computer Diagnostics disks are not Y2K-compliant and will produce a *0152 ERROR - SYSTEM BOARD* code if :ref:`time synchronization ` is enabled. This code can be cleared by disabling time synchronization, then clearing the CMOS by deleting ``ibmat.nvr`` from the machine's ``nvr`` directory. +.. rubric:: IBM XT Model 286 + +* On-board RAM is limited to 640 KB; more can be added through :ref:`ISA memory expansion ` cards. + +.. rubric:: AMI IBM AT + +See: :ref:`ibmat` + +.. rubric:: Phoenix IBM AT + +See: :ref:`ibmat` + +.. rubric:: Quadtel IBM AT + +See: :ref:`ibmat` + i486 ----